/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-11 15:11:59,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-11 15:11:59,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-11 15:11:59,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-11 15:11:59,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-11 15:11:59,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-11 15:11:59,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-11 15:11:59,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-11 15:11:59,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-11 15:11:59,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-11 15:11:59,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-11 15:11:59,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-11 15:11:59,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-11 15:11:59,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-11 15:11:59,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-11 15:11:59,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-11 15:11:59,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-11 15:11:59,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-11 15:11:59,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-11 15:11:59,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-11 15:11:59,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-11 15:11:59,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-11 15:11:59,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-11 15:11:59,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-11 15:11:59,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-11 15:11:59,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-11 15:11:59,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-11 15:11:59,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-11 15:11:59,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-11 15:11:59,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-11 15:11:59,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-11 15:11:59,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-11 15:11:59,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-11 15:11:59,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-11 15:11:59,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-11 15:11:59,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-11 15:11:59,494 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2020-11-11 15:11:59,526 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-11 15:11:59,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-11 15:11:59,529 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-11 15:11:59,530 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-11 15:11:59,530 INFO L138 SettingsManager]: * Use SBE=true [2020-11-11 15:11:59,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-11 15:11:59,530 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-11 15:11:59,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-11 15:11:59,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-11 15:11:59,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-11 15:11:59,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-11 15:11:59,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-11 15:11:59,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-11 15:11:59,532 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-11 15:11:59,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-11 15:11:59,532 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-11 15:11:59,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-11 15:11:59,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-11 15:11:59,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-11 15:11:59,533 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-11 15:11:59,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-11 15:11:59,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 15:11:59,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-11 15:11:59,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-11 15:11:59,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-11 15:11:59,535 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-11 15:11:59,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-11 15:11:59,535 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-11-11 15:11:59,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-11 15:11:59,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-11 15:12:00,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-11 15:12:00,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-11 15:12:00,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-11 15:12:00,136 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-11 15:12:00,136 INFO L275 PluginConnector]: CDTParser initialized [2020-11-11 15:12:00,138 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-11-11 15:12:00,266 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35c67a2da/60e46139219743d784b38ee31961fa06/FLAGa467b6d22 [2020-11-11 15:12:01,080 INFO L306 CDTParser]: Found 1 translation units. [2020-11-11 15:12:01,081 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-11-11 15:12:01,102 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35c67a2da/60e46139219743d784b38ee31961fa06/FLAGa467b6d22 [2020-11-11 15:12:01,284 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35c67a2da/60e46139219743d784b38ee31961fa06 [2020-11-11 15:12:01,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-11 15:12:01,301 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-11 15:12:01,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-11 15:12:01,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-11 15:12:01,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-11 15:12:01,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:12:01" (1/1) ... [2020-11-11 15:12:01,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b3d7d63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:01, skipping insertion in model container [2020-11-11 15:12:01,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:12:01" (1/1) ... [2020-11-11 15:12:01,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-11 15:12:01,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-11 15:12:02,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 15:12:02,071 INFO L203 MainTranslator]: Completed pre-run [2020-11-11 15:12:02,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 15:12:02,287 INFO L208 MainTranslator]: Completed translation [2020-11-11 15:12:02,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:02 WrapperNode [2020-11-11 15:12:02,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-11 15:12:02,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-11 15:12:02,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-11 15:12:02,291 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-11 15:12:02,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:02" (1/1) ... [2020-11-11 15:12:02,349 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:02" (1/1) ... [2020-11-11 15:12:02,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-11 15:12:02,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-11 15:12:02,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-11 15:12:02,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-11 15:12:02,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:02" (1/1) ... [2020-11-11 15:12:02,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:02" (1/1) ... [2020-11-11 15:12:02,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:02" (1/1) ... [2020-11-11 15:12:02,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:02" (1/1) ... [2020-11-11 15:12:02,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:02" (1/1) ... [2020-11-11 15:12:02,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:02" (1/1) ... [2020-11-11 15:12:02,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:02" (1/1) ... [2020-11-11 15:12:02,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-11 15:12:02,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-11 15:12:02,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-11 15:12:02,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-11 15:12:02,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 15:12:02,555 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-11 15:12:02,557 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-11 15:12:02,557 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-11 15:12:02,558 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-11 15:12:02,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-11 15:12:02,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-11 15:12:02,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-11 15:12:02,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-11 15:12:02,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-11 15:12:02,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-11 15:12:02,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-11 15:12:02,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-11 15:12:02,564 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-11 15:12:03,022 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-11 15:12:03,022 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-11 15:12:03,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:12:03 BoogieIcfgContainer [2020-11-11 15:12:03,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-11 15:12:03,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-11 15:12:03,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-11 15:12:03,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-11 15:12:03,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 03:12:01" (1/3) ... [2020-11-11 15:12:03,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a32f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:12:03, skipping insertion in model container [2020-11-11 15:12:03,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:12:02" (2/3) ... [2020-11-11 15:12:03,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a32f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:12:03, skipping insertion in model container [2020-11-11 15:12:03,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:12:03" (3/3) ... [2020-11-11 15:12:03,034 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-11-11 15:12:03,053 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-11 15:12:03,054 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-11 15:12:03,058 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-11 15:12:03,059 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-11 15:12:03,088 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,089 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,089 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,089 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,089 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,090 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,090 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,090 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,090 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,091 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,091 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,091 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,092 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,092 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,092 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,092 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,093 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,093 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,093 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,093 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,094 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,094 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,094 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,094 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,095 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,095 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,095 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,095 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,096 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,096 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,096 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,096 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,097 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,097 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,097 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,097 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,097 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,098 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,098 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,098 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,099 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,099 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,099 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,099 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,100 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,100 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,101 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,101 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,101 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,101 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,101 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,102 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,102 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,102 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,102 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,102 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,105 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,105 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,105 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,105 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,106 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,106 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,111 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,112 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,112 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,112 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,112 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,112 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:12:03,114 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-11 15:12:03,128 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-11 15:12:03,154 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-11 15:12:03,154 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-11 15:12:03,154 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-11 15:12:03,155 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-11 15:12:03,155 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-11 15:12:03,155 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-11 15:12:03,155 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-11 15:12:03,155 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-11 15:12:03,167 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 64 transitions, 138 flow [2020-11-11 15:12:03,296 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:03,306 INFO L276 IsEmpty]: Start isEmpty. Operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:03,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-11 15:12:03,323 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:03,324 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:03,324 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:03,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:03,331 INFO L82 PathProgramCache]: Analyzing trace with hash 27863943, now seen corresponding path program 1 times [2020-11-11 15:12:03,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:03,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477569761] [2020-11-11 15:12:03,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:03,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477569761] [2020-11-11 15:12:03,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:12:03,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-11 15:12:03,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364884639] [2020-11-11 15:12:03,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 15:12:03,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:03,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 15:12:03,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-11 15:12:03,842 INFO L87 Difference]: Start difference. First operand has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:04,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:04,250 INFO L93 Difference]: Finished difference Result 3336 states and 9728 transitions. [2020-11-11 15:12:04,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-11 15:12:04,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2020-11-11 15:12:04,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:04,284 INFO L225 Difference]: With dead ends: 3336 [2020-11-11 15:12:04,284 INFO L226 Difference]: Without dead ends: 1320 [2020-11-11 15:12:04,287 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-11 15:12:04,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2020-11-11 15:12:04,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 808. [2020-11-11 15:12:04,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 2.7732342007434942) internal successors, (2238), 807 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2238 transitions. [2020-11-11 15:12:04,472 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2238 transitions. Word has length 28 [2020-11-11 15:12:04,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:04,473 INFO L481 AbstractCegarLoop]: Abstraction has 808 states and 2238 transitions. [2020-11-11 15:12:04,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:04,474 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2238 transitions. [2020-11-11 15:12:04,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-11 15:12:04,478 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:04,478 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:04,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-11 15:12:04,479 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:04,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:04,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1417635940, now seen corresponding path program 1 times [2020-11-11 15:12:04,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:04,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626319664] [2020-11-11 15:12:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:04,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626319664] [2020-11-11 15:12:04,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:12:04,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-11 15:12:04,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737751774] [2020-11-11 15:12:04,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 15:12:04,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:04,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 15:12:04,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-11 15:12:04,677 INFO L87 Difference]: Start difference. First operand 808 states and 2238 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:04,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:04,824 INFO L93 Difference]: Finished difference Result 2107 states and 5756 transitions. [2020-11-11 15:12:04,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 15:12:04,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2020-11-11 15:12:04,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:04,846 INFO L225 Difference]: With dead ends: 2107 [2020-11-11 15:12:04,846 INFO L226 Difference]: Without dead ends: 1851 [2020-11-11 15:12:04,847 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-11 15:12:04,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2020-11-11 15:12:04,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 982. [2020-11-11 15:12:04,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 2.7533129459734966) internal successors, (2701), 981 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 2701 transitions. [2020-11-11 15:12:04,933 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 2701 transitions. Word has length 32 [2020-11-11 15:12:04,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:04,933 INFO L481 AbstractCegarLoop]: Abstraction has 982 states and 2701 transitions. [2020-11-11 15:12:04,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:04,934 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 2701 transitions. [2020-11-11 15:12:04,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-11 15:12:04,936 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:04,936 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:04,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-11 15:12:04,937 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:04,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:04,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1368897688, now seen corresponding path program 2 times [2020-11-11 15:12:04,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:04,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540786895] [2020-11-11 15:12:04,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:04,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:05,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540786895] [2020-11-11 15:12:05,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:12:05,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-11 15:12:05,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498757419] [2020-11-11 15:12:05,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 15:12:05,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:05,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 15:12:05,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-11 15:12:05,159 INFO L87 Difference]: Start difference. First operand 982 states and 2701 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:05,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:05,298 INFO L93 Difference]: Finished difference Result 1227 states and 3221 transitions. [2020-11-11 15:12:05,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 15:12:05,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2020-11-11 15:12:05,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:05,305 INFO L225 Difference]: With dead ends: 1227 [2020-11-11 15:12:05,305 INFO L226 Difference]: Without dead ends: 902 [2020-11-11 15:12:05,306 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:12:05,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2020-11-11 15:12:05,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 810. [2020-11-11 15:12:05,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 2.7169344870210135) internal successors, (2198), 809 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:05,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2198 transitions. [2020-11-11 15:12:05,339 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2198 transitions. Word has length 32 [2020-11-11 15:12:05,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:05,339 INFO L481 AbstractCegarLoop]: Abstraction has 810 states and 2198 transitions. [2020-11-11 15:12:05,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:05,340 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2198 transitions. [2020-11-11 15:12:05,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-11 15:12:05,342 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:05,342 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:05,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-11 15:12:05,342 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:05,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:05,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1044457191, now seen corresponding path program 1 times [2020-11-11 15:12:05,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:05,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774617901] [2020-11-11 15:12:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:05,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:05,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774617901] [2020-11-11 15:12:05,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:12:05,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-11 15:12:05,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088128682] [2020-11-11 15:12:05,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 15:12:05,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:05,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 15:12:05,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-11 15:12:05,526 INFO L87 Difference]: Start difference. First operand 810 states and 2198 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:05,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:05,689 INFO L93 Difference]: Finished difference Result 1698 states and 4550 transitions. [2020-11-11 15:12:05,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:12:05,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2020-11-11 15:12:05,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:05,717 INFO L225 Difference]: With dead ends: 1698 [2020-11-11 15:12:05,718 INFO L226 Difference]: Without dead ends: 1431 [2020-11-11 15:12:05,718 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:12:05,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2020-11-11 15:12:05,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 855. [2020-11-11 15:12:05,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 2.6814988290398127) internal successors, (2290), 854 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:05,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2290 transitions. [2020-11-11 15:12:05,766 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2290 transitions. Word has length 36 [2020-11-11 15:12:05,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:05,766 INFO L481 AbstractCegarLoop]: Abstraction has 855 states and 2290 transitions. [2020-11-11 15:12:05,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:05,767 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2290 transitions. [2020-11-11 15:12:05,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-11 15:12:05,769 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:05,769 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:05,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-11 15:12:05,769 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:05,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:05,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2125654229, now seen corresponding path program 2 times [2020-11-11 15:12:05,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:05,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139304491] [2020-11-11 15:12:05,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:05,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139304491] [2020-11-11 15:12:05,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:12:05,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 15:12:05,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598033361] [2020-11-11 15:12:05,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 15:12:05,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:05,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 15:12:05,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-11 15:12:05,939 INFO L87 Difference]: Start difference. First operand 855 states and 2290 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:06,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:06,171 INFO L93 Difference]: Finished difference Result 1253 states and 3278 transitions. [2020-11-11 15:12:06,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 15:12:06,172 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2020-11-11 15:12:06,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:06,180 INFO L225 Difference]: With dead ends: 1253 [2020-11-11 15:12:06,180 INFO L226 Difference]: Without dead ends: 1029 [2020-11-11 15:12:06,180 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:06,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2020-11-11 15:12:06,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 899. [2020-11-11 15:12:06,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.714922048997773) internal successors, (2438), 898 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2438 transitions. [2020-11-11 15:12:06,219 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2438 transitions. Word has length 36 [2020-11-11 15:12:06,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:06,220 INFO L481 AbstractCegarLoop]: Abstraction has 899 states and 2438 transitions. [2020-11-11 15:12:06,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:06,220 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2438 transitions. [2020-11-11 15:12:06,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-11 15:12:06,222 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:06,222 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:06,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-11 15:12:06,222 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:06,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:06,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1451531371, now seen corresponding path program 3 times [2020-11-11 15:12:06,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:06,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574262700] [2020-11-11 15:12:06,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:06,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574262700] [2020-11-11 15:12:06,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:12:06,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 15:12:06,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112087015] [2020-11-11 15:12:06,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 15:12:06,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:06,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 15:12:06,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-11 15:12:06,358 INFO L87 Difference]: Start difference. First operand 899 states and 2438 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:06,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:06,517 INFO L93 Difference]: Finished difference Result 2449 states and 6632 transitions. [2020-11-11 15:12:06,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:12:06,518 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2020-11-11 15:12:06,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:06,533 INFO L225 Difference]: With dead ends: 2449 [2020-11-11 15:12:06,533 INFO L226 Difference]: Without dead ends: 2182 [2020-11-11 15:12:06,534 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:12:06,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2020-11-11 15:12:06,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1005. [2020-11-11 15:12:06,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 2.7739043824701195) internal successors, (2785), 1004 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 2785 transitions. [2020-11-11 15:12:06,596 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 2785 transitions. Word has length 36 [2020-11-11 15:12:06,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:06,596 INFO L481 AbstractCegarLoop]: Abstraction has 1005 states and 2785 transitions. [2020-11-11 15:12:06,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:06,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 2785 transitions. [2020-11-11 15:12:06,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-11 15:12:06,599 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:06,599 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:06,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-11 15:12:06,599 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:06,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:06,603 INFO L82 PathProgramCache]: Analyzing trace with hash 259676583, now seen corresponding path program 4 times [2020-11-11 15:12:06,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:06,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481948283] [2020-11-11 15:12:06,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:06,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481948283] [2020-11-11 15:12:06,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:12:06,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 15:12:06,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234388224] [2020-11-11 15:12:06,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 15:12:06,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:06,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 15:12:06,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-11 15:12:06,794 INFO L87 Difference]: Start difference. First operand 1005 states and 2785 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:06,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:06,986 INFO L93 Difference]: Finished difference Result 1373 states and 3633 transitions. [2020-11-11 15:12:06,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:12:06,987 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2020-11-11 15:12:06,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:06,995 INFO L225 Difference]: With dead ends: 1373 [2020-11-11 15:12:06,995 INFO L226 Difference]: Without dead ends: 1037 [2020-11-11 15:12:06,996 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:12:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2020-11-11 15:12:07,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 932. [2020-11-11 15:12:07,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 2.740064446831364) internal successors, (2551), 931 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:07,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 2551 transitions. [2020-11-11 15:12:07,040 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 2551 transitions. Word has length 36 [2020-11-11 15:12:07,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:07,041 INFO L481 AbstractCegarLoop]: Abstraction has 932 states and 2551 transitions. [2020-11-11 15:12:07,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:07,041 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 2551 transitions. [2020-11-11 15:12:07,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:12:07,044 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:07,044 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:07,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-11 15:12:07,044 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:07,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:07,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1144099044, now seen corresponding path program 1 times [2020-11-11 15:12:07,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:07,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13683945] [2020-11-11 15:12:07,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:07,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13683945] [2020-11-11 15:12:07,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895571040] [2020-11-11 15:12:07,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:07,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 15:12:07,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:07,460 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:07,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:07,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-11 15:12:07,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236646941] [2020-11-11 15:12:07,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 15:12:07,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:07,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 15:12:07,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-11 15:12:07,489 INFO L87 Difference]: Start difference. First operand 932 states and 2551 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:07,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:07,655 INFO L93 Difference]: Finished difference Result 1330 states and 3475 transitions. [2020-11-11 15:12:07,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:12:07,656 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2020-11-11 15:12:07,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:07,664 INFO L225 Difference]: With dead ends: 1330 [2020-11-11 15:12:07,664 INFO L226 Difference]: Without dead ends: 1060 [2020-11-11 15:12:07,664 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:12:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2020-11-11 15:12:07,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 977. [2020-11-11 15:12:07,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 2.7059426229508197) internal successors, (2641), 976 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:07,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 2641 transitions. [2020-11-11 15:12:07,707 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 2641 transitions. Word has length 41 [2020-11-11 15:12:07,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:07,707 INFO L481 AbstractCegarLoop]: Abstraction has 977 states and 2641 transitions. [2020-11-11 15:12:07,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:07,708 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 2641 transitions. [2020-11-11 15:12:07,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:12:07,710 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:07,710 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:07,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-11-11 15:12:07,925 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:07,926 INFO L82 PathProgramCache]: Analyzing trace with hash 988054880, now seen corresponding path program 2 times [2020-11-11 15:12:07,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:07,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456756133] [2020-11-11 15:12:07,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:08,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456756133] [2020-11-11 15:12:08,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367107457] [2020-11-11 15:12:08,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:08,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:08,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:08,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 15:12:08,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:08,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:08,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:08,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:08,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-11 15:12:08,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029245395] [2020-11-11 15:12:08,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 15:12:08,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:08,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 15:12:08,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-11 15:12:08,228 INFO L87 Difference]: Start difference. First operand 977 states and 2641 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:08,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:08,460 INFO L93 Difference]: Finished difference Result 1460 states and 3735 transitions. [2020-11-11 15:12:08,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 15:12:08,461 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2020-11-11 15:12:08,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:08,469 INFO L225 Difference]: With dead ends: 1460 [2020-11-11 15:12:08,469 INFO L226 Difference]: Without dead ends: 1190 [2020-11-11 15:12:08,470 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:12:08,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2020-11-11 15:12:08,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 982. [2020-11-11 15:12:08,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 2.7074413863404687) internal successors, (2656), 981 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:08,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 2656 transitions. [2020-11-11 15:12:08,510 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 2656 transitions. Word has length 41 [2020-11-11 15:12:08,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:08,511 INFO L481 AbstractCegarLoop]: Abstraction has 982 states and 2656 transitions. [2020-11-11 15:12:08,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:08,511 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 2656 transitions. [2020-11-11 15:12:08,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:12:08,513 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:08,513 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:08,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:08,728 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:08,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:08,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1616846382, now seen corresponding path program 3 times [2020-11-11 15:12:08,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:08,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284784367] [2020-11-11 15:12:08,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:08,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:08,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284784367] [2020-11-11 15:12:08,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264871139] [2020-11-11 15:12:08,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:08,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 15:12:08,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:08,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 15:12:08,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:09,033 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:09,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:09,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-11 15:12:09,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160060466] [2020-11-11 15:12:09,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 15:12:09,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:09,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 15:12:09,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-11 15:12:09,055 INFO L87 Difference]: Start difference. First operand 982 states and 2656 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:09,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:09,367 INFO L93 Difference]: Finished difference Result 2552 states and 6879 transitions. [2020-11-11 15:12:09,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 15:12:09,367 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2020-11-11 15:12:09,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:09,383 INFO L225 Difference]: With dead ends: 2552 [2020-11-11 15:12:09,383 INFO L226 Difference]: Without dead ends: 2282 [2020-11-11 15:12:09,384 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:12:09,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2020-11-11 15:12:09,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 1077. [2020-11-11 15:12:09,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 2.757434944237918) internal successors, (2967), 1076 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:09,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 2967 transitions. [2020-11-11 15:12:09,441 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 2967 transitions. Word has length 41 [2020-11-11 15:12:09,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:09,441 INFO L481 AbstractCegarLoop]: Abstraction has 1077 states and 2967 transitions. [2020-11-11 15:12:09,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:09,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 2967 transitions. [2020-11-11 15:12:09,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:12:09,444 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:09,444 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:09,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-11 15:12:09,659 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:09,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:09,660 INFO L82 PathProgramCache]: Analyzing trace with hash -966912960, now seen corresponding path program 4 times [2020-11-11 15:12:09,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:09,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563429384] [2020-11-11 15:12:09,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:09,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563429384] [2020-11-11 15:12:09,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648717656] [2020-11-11 15:12:09,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:09,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:09,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:09,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:12:09,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:10,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:10,058 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:10,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:10,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-11-11 15:12:10,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090278322] [2020-11-11 15:12:10,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:12:10,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:10,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:12:10,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:12:10,087 INFO L87 Difference]: Start difference. First operand 1077 states and 2967 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:10,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:10,532 INFO L93 Difference]: Finished difference Result 1892 states and 4965 transitions. [2020-11-11 15:12:10,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:12:10,533 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2020-11-11 15:12:10,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:10,543 INFO L225 Difference]: With dead ends: 1892 [2020-11-11 15:12:10,543 INFO L226 Difference]: Without dead ends: 1365 [2020-11-11 15:12:10,544 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:12:10,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2020-11-11 15:12:10,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1087. [2020-11-11 15:12:10,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.7495395948434624) internal successors, (2986), 1086 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2986 transitions. [2020-11-11 15:12:10,605 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2986 transitions. Word has length 41 [2020-11-11 15:12:10,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:10,606 INFO L481 AbstractCegarLoop]: Abstraction has 1087 states and 2986 transitions. [2020-11-11 15:12:10,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:10,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2986 transitions. [2020-11-11 15:12:10,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:12:10,610 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:10,610 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:10,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:10,823 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:10,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:10,824 INFO L82 PathProgramCache]: Analyzing trace with hash 2116060661, now seen corresponding path program 1 times [2020-11-11 15:12:10,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:10,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26840642] [2020-11-11 15:12:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:10,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26840642] [2020-11-11 15:12:10,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148761709] [2020-11-11 15:12:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:11,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 15:12:11,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:11,074 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:11,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:11,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:11,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:11,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-11 15:12:11,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417575653] [2020-11-11 15:12:11,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 15:12:11,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:11,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 15:12:11,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-11 15:12:11,095 INFO L87 Difference]: Start difference. First operand 1087 states and 2986 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:11,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:11,265 INFO L93 Difference]: Finished difference Result 1520 states and 4049 transitions. [2020-11-11 15:12:11,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:12:11,266 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2020-11-11 15:12:11,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:11,275 INFO L225 Difference]: With dead ends: 1520 [2020-11-11 15:12:11,275 INFO L226 Difference]: Without dead ends: 1290 [2020-11-11 15:12:11,275 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:12:11,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2020-11-11 15:12:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1137. [2020-11-11 15:12:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 2.76056338028169) internal successors, (3136), 1136 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:11,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 3136 transitions. [2020-11-11 15:12:11,314 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 3136 transitions. Word has length 41 [2020-11-11 15:12:11,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:11,314 INFO L481 AbstractCegarLoop]: Abstraction has 1137 states and 3136 transitions. [2020-11-11 15:12:11,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:11,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 3136 transitions. [2020-11-11 15:12:11,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-11 15:12:11,317 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:11,317 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:11,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-11 15:12:11,531 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:11,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:11,532 INFO L82 PathProgramCache]: Analyzing trace with hash -226684744, now seen corresponding path program 1 times [2020-11-11 15:12:11,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:11,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516425479] [2020-11-11 15:12:11,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:11,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516425479] [2020-11-11 15:12:11,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943045497] [2020-11-11 15:12:11,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:11,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:12:11,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:11,845 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:11,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:11,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:11,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2020-11-11 15:12:11,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562027750] [2020-11-11 15:12:11,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:12:11,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:11,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:12:11,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:12:11,901 INFO L87 Difference]: Start difference. First operand 1137 states and 3136 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:12,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:12,214 INFO L93 Difference]: Finished difference Result 2005 states and 5320 transitions. [2020-11-11 15:12:12,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 15:12:12,216 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2020-11-11 15:12:12,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:12,228 INFO L225 Difference]: With dead ends: 2005 [2020-11-11 15:12:12,228 INFO L226 Difference]: Without dead ends: 1671 [2020-11-11 15:12:12,229 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:12:12,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2020-11-11 15:12:12,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1222. [2020-11-11 15:12:12,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 2.7076167076167077) internal successors, (3306), 1221 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:12,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 3306 transitions. [2020-11-11 15:12:12,295 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 3306 transitions. Word has length 46 [2020-11-11 15:12:12,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:12,296 INFO L481 AbstractCegarLoop]: Abstraction has 1222 states and 3306 transitions. [2020-11-11 15:12:12,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:12,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 3306 transitions. [2020-11-11 15:12:12,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-11 15:12:12,300 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:12,300 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:12,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:12,515 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:12,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:12,516 INFO L82 PathProgramCache]: Analyzing trace with hash -359805978, now seen corresponding path program 2 times [2020-11-11 15:12:12,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:12,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73015524] [2020-11-11 15:12:12,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:12,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73015524] [2020-11-11 15:12:12,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928786198] [2020-11-11 15:12:12,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:12,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:12,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:12,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 15:12:12,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:12,816 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:12,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:12,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-11 15:12:12,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667039798] [2020-11-11 15:12:12,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:12:12,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:12,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:12:12,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:12:12,828 INFO L87 Difference]: Start difference. First operand 1222 states and 3306 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:13,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:13,046 INFO L93 Difference]: Finished difference Result 1870 states and 4730 transitions. [2020-11-11 15:12:13,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 15:12:13,047 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2020-11-11 15:12:13,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:13,056 INFO L225 Difference]: With dead ends: 1870 [2020-11-11 15:12:13,056 INFO L226 Difference]: Without dead ends: 1600 [2020-11-11 15:12:13,056 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:13,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2020-11-11 15:12:13,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1237. [2020-11-11 15:12:13,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1236 states have (on average 2.6990291262135924) internal successors, (3336), 1236 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:13,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 3336 transitions. [2020-11-11 15:12:13,097 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 3336 transitions. Word has length 46 [2020-11-11 15:12:13,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:13,097 INFO L481 AbstractCegarLoop]: Abstraction has 1237 states and 3336 transitions. [2020-11-11 15:12:13,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:13,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 3336 transitions. [2020-11-11 15:12:13,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-11 15:12:13,101 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:13,101 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:13,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-11 15:12:13,315 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:13,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:13,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1471726806, now seen corresponding path program 3 times [2020-11-11 15:12:13,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:13,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792399057] [2020-11-11 15:12:13,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:13,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792399057] [2020-11-11 15:12:13,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3926299] [2020-11-11 15:12:13,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:13,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 15:12:13,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:13,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 15:12:13,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:13,542 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:13,574 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:13,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:13,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-11-11 15:12:13,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372489666] [2020-11-11 15:12:13,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:12:13,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:13,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:12:13,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:12:13,587 INFO L87 Difference]: Start difference. First operand 1237 states and 3336 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:13,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:13,936 INFO L93 Difference]: Finished difference Result 1800 states and 4610 transitions. [2020-11-11 15:12:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 15:12:13,937 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2020-11-11 15:12:13,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:13,947 INFO L225 Difference]: With dead ends: 1800 [2020-11-11 15:12:13,947 INFO L226 Difference]: Without dead ends: 1530 [2020-11-11 15:12:13,948 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:12:13,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2020-11-11 15:12:13,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1237. [2020-11-11 15:12:13,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1236 states have (on average 2.703074433656958) internal successors, (3341), 1236 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:13,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 3341 transitions. [2020-11-11 15:12:13,994 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 3341 transitions. Word has length 46 [2020-11-11 15:12:13,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:13,995 INFO L481 AbstractCegarLoop]: Abstraction has 1237 states and 3341 transitions. [2020-11-11 15:12:13,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:13,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 3341 transitions. [2020-11-11 15:12:13,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-11 15:12:13,998 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:13,998 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:14,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-11 15:12:14,212 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:14,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:14,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2100518308, now seen corresponding path program 4 times [2020-11-11 15:12:14,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:14,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850945161] [2020-11-11 15:12:14,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:14,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850945161] [2020-11-11 15:12:14,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153119015] [2020-11-11 15:12:14,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:14,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:14,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:14,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:12:14,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:14,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:14,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:14,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-11 15:12:14,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140281550] [2020-11-11 15:12:14,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:12:14,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:14,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:12:14,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:12:14,459 INFO L87 Difference]: Start difference. First operand 1237 states and 3341 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:14,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:14,738 INFO L93 Difference]: Finished difference Result 2912 states and 7794 transitions. [2020-11-11 15:12:14,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 15:12:14,739 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2020-11-11 15:12:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:14,756 INFO L225 Difference]: With dead ends: 2912 [2020-11-11 15:12:14,756 INFO L226 Difference]: Without dead ends: 2642 [2020-11-11 15:12:14,757 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2020-11-11 15:12:14,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1362. [2020-11-11 15:12:14,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 2.742101396032329) internal successors, (3732), 1361 states have internal predecessors, (3732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:14,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 3732 transitions. [2020-11-11 15:12:14,840 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 3732 transitions. Word has length 46 [2020-11-11 15:12:14,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:14,840 INFO L481 AbstractCegarLoop]: Abstraction has 1362 states and 3732 transitions. [2020-11-11 15:12:14,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:14,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 3732 transitions. [2020-11-11 15:12:14,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-11 15:12:14,843 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:14,843 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:15,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-11 15:12:15,057 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:15,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:15,058 INFO L82 PathProgramCache]: Analyzing trace with hash -483241034, now seen corresponding path program 5 times [2020-11-11 15:12:15,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:15,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209017868] [2020-11-11 15:12:15,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:15,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209017868] [2020-11-11 15:12:15,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675879772] [2020-11-11 15:12:15,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:15,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 15:12:15,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:15,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 15:12:15,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:15,286 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:15,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:15,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:15,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-11 15:12:15,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774356468] [2020-11-11 15:12:15,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:12:15,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:15,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:12:15,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:12:15,331 INFO L87 Difference]: Start difference. First operand 1362 states and 3732 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:15,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:15,735 INFO L93 Difference]: Finished difference Result 1951 states and 5150 transitions. [2020-11-11 15:12:15,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 15:12:15,736 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2020-11-11 15:12:15,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:15,741 INFO L225 Difference]: With dead ends: 1951 [2020-11-11 15:12:15,741 INFO L226 Difference]: Without dead ends: 1480 [2020-11-11 15:12:15,742 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:12:15,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2020-11-11 15:12:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1152. [2020-11-11 15:12:15,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 2.7158992180712422) internal successors, (3126), 1151 states have internal predecessors, (3126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:15,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 3126 transitions. [2020-11-11 15:12:15,780 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 3126 transitions. Word has length 46 [2020-11-11 15:12:15,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:15,780 INFO L481 AbstractCegarLoop]: Abstraction has 1152 states and 3126 transitions. [2020-11-11 15:12:15,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:15,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 3126 transitions. [2020-11-11 15:12:15,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:12:15,783 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:15,784 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:15,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-11 15:12:15,998 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:15,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:15,999 INFO L82 PathProgramCache]: Analyzing trace with hash -935339201, now seen corresponding path program 6 times [2020-11-11 15:12:15,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:16,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301771224] [2020-11-11 15:12:16,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:16,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301771224] [2020-11-11 15:12:16,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763936697] [2020-11-11 15:12:16,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:16,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 15:12:16,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:16,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:12:16,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:16,263 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:16,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:16,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-11 15:12:16,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683145588] [2020-11-11 15:12:16,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:12:16,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:16,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:12:16,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:12:16,277 INFO L87 Difference]: Start difference. First operand 1152 states and 3126 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:16,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:16,545 INFO L93 Difference]: Finished difference Result 1745 states and 4490 transitions. [2020-11-11 15:12:16,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 15:12:16,545 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2020-11-11 15:12:16,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:16,551 INFO L225 Difference]: With dead ends: 1745 [2020-11-11 15:12:16,551 INFO L226 Difference]: Without dead ends: 1475 [2020-11-11 15:12:16,552 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:12:16,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2020-11-11 15:12:16,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 1202. [2020-11-11 15:12:16,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 2.7277268942547876) internal successors, (3276), 1201 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:16,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 3276 transitions. [2020-11-11 15:12:16,587 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 3276 transitions. Word has length 51 [2020-11-11 15:12:16,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:16,587 INFO L481 AbstractCegarLoop]: Abstraction has 1202 states and 3276 transitions. [2020-11-11 15:12:16,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:16,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 3276 transitions. [2020-11-11 15:12:16,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:12:16,590 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:16,590 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:16,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-11 15:12:16,804 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:16,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:16,805 INFO L82 PathProgramCache]: Analyzing trace with hash 896193583, now seen corresponding path program 7 times [2020-11-11 15:12:16,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:16,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440258084] [2020-11-11 15:12:16,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:16,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440258084] [2020-11-11 15:12:16,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883059044] [2020-11-11 15:12:16,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:17,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:12:17,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:17,045 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:17,068 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:17,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:17,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 15:12:17,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831448438] [2020-11-11 15:12:17,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:12:17,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:17,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:12:17,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:12:17,076 INFO L87 Difference]: Start difference. First operand 1202 states and 3276 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:17,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:17,488 INFO L93 Difference]: Finished difference Result 1885 states and 4850 transitions. [2020-11-11 15:12:17,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:12:17,488 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2020-11-11 15:12:17,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:17,493 INFO L225 Difference]: With dead ends: 1885 [2020-11-11 15:12:17,493 INFO L226 Difference]: Without dead ends: 1615 [2020-11-11 15:12:17,494 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:12:17,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2020-11-11 15:12:17,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1252. [2020-11-11 15:12:17,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 2.7505995203836933) internal successors, (3441), 1251 states have internal predecessors, (3441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:17,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 3441 transitions. [2020-11-11 15:12:17,532 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 3441 transitions. Word has length 51 [2020-11-11 15:12:17,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:17,533 INFO L481 AbstractCegarLoop]: Abstraction has 1252 states and 3441 transitions. [2020-11-11 15:12:17,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:17,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 3441 transitions. [2020-11-11 15:12:17,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:12:17,536 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:17,536 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:17,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:17,752 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:17,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:17,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1524985085, now seen corresponding path program 8 times [2020-11-11 15:12:17,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:17,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230206852] [2020-11-11 15:12:17,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:17,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:17,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230206852] [2020-11-11 15:12:17,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039816803] [2020-11-11 15:12:17,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:17,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:17,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:17,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:12:17,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:17,981 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:17,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:17,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-11 15:12:17,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454621276] [2020-11-11 15:12:17,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:12:17,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:17,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:12:17,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:12:17,993 INFO L87 Difference]: Start difference. First operand 1252 states and 3441 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:18,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:18,342 INFO L93 Difference]: Finished difference Result 2952 states and 7944 transitions. [2020-11-11 15:12:18,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:12:18,343 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2020-11-11 15:12:18,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:18,350 INFO L225 Difference]: With dead ends: 2952 [2020-11-11 15:12:18,350 INFO L226 Difference]: Without dead ends: 2682 [2020-11-11 15:12:18,351 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:12:18,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2020-11-11 15:12:18,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1377. [2020-11-11 15:12:18,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1376 states have (on average 2.7848837209302326) internal successors, (3832), 1376 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:18,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 3832 transitions. [2020-11-11 15:12:18,402 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 3832 transitions. Word has length 51 [2020-11-11 15:12:18,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:18,402 INFO L481 AbstractCegarLoop]: Abstraction has 1377 states and 3832 transitions. [2020-11-11 15:12:18,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:18,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 3832 transitions. [2020-11-11 15:12:18,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:12:18,405 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:18,405 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:18,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-11-11 15:12:18,621 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:18,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:18,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1058774257, now seen corresponding path program 9 times [2020-11-11 15:12:18,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:18,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062677538] [2020-11-11 15:12:18,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:18,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062677538] [2020-11-11 15:12:18,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011422076] [2020-11-11 15:12:18,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:18,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 15:12:18,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:18,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:12:18,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:18,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:18,891 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:18,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:18,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 15:12:18,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259820871] [2020-11-11 15:12:18,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:12:18,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:18,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:12:18,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:12:18,901 INFO L87 Difference]: Start difference. First operand 1377 states and 3832 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:19,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:19,352 INFO L93 Difference]: Finished difference Result 1966 states and 5250 transitions. [2020-11-11 15:12:19,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:12:19,352 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2020-11-11 15:12:19,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:19,358 INFO L225 Difference]: With dead ends: 1966 [2020-11-11 15:12:19,358 INFO L226 Difference]: Without dead ends: 1555 [2020-11-11 15:12:19,359 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:12:19,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2020-11-11 15:12:19,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1091. [2020-11-11 15:12:19,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1090 states have (on average 2.7229357798165137) internal successors, (2968), 1090 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 2968 transitions. [2020-11-11 15:12:19,417 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 2968 transitions. Word has length 51 [2020-11-11 15:12:19,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:19,417 INFO L481 AbstractCegarLoop]: Abstraction has 1091 states and 2968 transitions. [2020-11-11 15:12:19,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:19,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 2968 transitions. [2020-11-11 15:12:19,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:12:19,420 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:19,420 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:19,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:19,629 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:19,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:19,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1906333367, now seen corresponding path program 10 times [2020-11-11 15:12:19,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:19,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973507160] [2020-11-11 15:12:19,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:19,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973507160] [2020-11-11 15:12:19,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813898022] [2020-11-11 15:12:19,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:19,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:19,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:19,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:12:19,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:19,944 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:19,989 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:20,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:20,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2020-11-11 15:12:20,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035349748] [2020-11-11 15:12:20,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:12:20,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:20,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:12:20,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:12:20,012 INFO L87 Difference]: Start difference. First operand 1091 states and 2968 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:20,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:20,486 INFO L93 Difference]: Finished difference Result 2009 states and 5252 transitions. [2020-11-11 15:12:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:12:20,487 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-11-11 15:12:20,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:20,493 INFO L225 Difference]: With dead ends: 2009 [2020-11-11 15:12:20,493 INFO L226 Difference]: Without dead ends: 1675 [2020-11-11 15:12:20,494 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:12:20,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2020-11-11 15:12:20,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1176. [2020-11-11 15:12:20,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 2.6706382978723404) internal successors, (3138), 1175 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3138 transitions. [2020-11-11 15:12:20,531 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3138 transitions. Word has length 56 [2020-11-11 15:12:20,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:20,532 INFO L481 AbstractCegarLoop]: Abstraction has 1176 states and 3138 transitions. [2020-11-11 15:12:20,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:20,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3138 transitions. [2020-11-11 15:12:20,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:12:20,534 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:20,534 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:20,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-11 15:12:20,748 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:20,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:20,750 INFO L82 PathProgramCache]: Analyzing trace with hash -2112175369, now seen corresponding path program 11 times [2020-11-11 15:12:20,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:20,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251742178] [2020-11-11 15:12:20,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:20,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251742178] [2020-11-11 15:12:20,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769361643] [2020-11-11 15:12:20,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:21,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 15:12:21,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:21,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:12:21,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:21,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:21,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:21,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-11 15:12:21,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110669623] [2020-11-11 15:12:21,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:12:21,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:21,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:12:21,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:12:21,084 INFO L87 Difference]: Start difference. First operand 1176 states and 3138 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:21,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:21,375 INFO L93 Difference]: Finished difference Result 2060 states and 5120 transitions. [2020-11-11 15:12:21,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 15:12:21,376 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-11-11 15:12:21,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:21,381 INFO L225 Difference]: With dead ends: 2060 [2020-11-11 15:12:21,381 INFO L226 Difference]: Without dead ends: 1790 [2020-11-11 15:12:21,381 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:12:21,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2020-11-11 15:12:21,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1277. [2020-11-11 15:12:21,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1276 states have (on average 2.6849529780564265) internal successors, (3426), 1276 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:21,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 3426 transitions. [2020-11-11 15:12:21,422 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 3426 transitions. Word has length 56 [2020-11-11 15:12:21,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:21,422 INFO L481 AbstractCegarLoop]: Abstraction has 1277 states and 3426 transitions. [2020-11-11 15:12:21,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 3426 transitions. [2020-11-11 15:12:21,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:12:21,424 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:21,424 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:21,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:21,639 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:21,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:21,640 INFO L82 PathProgramCache]: Analyzing trace with hash 643256295, now seen corresponding path program 12 times [2020-11-11 15:12:21,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:21,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307657762] [2020-11-11 15:12:21,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:21,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307657762] [2020-11-11 15:12:21,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325642145] [2020-11-11 15:12:21,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:22,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 15:12:22,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:22,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:12:22,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:22,044 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:22,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:22,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:22,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-11-11 15:12:22,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586617048] [2020-11-11 15:12:22,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:12:22,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:22,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:12:22,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:12:22,149 INFO L87 Difference]: Start difference. First operand 1277 states and 3426 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:22,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:22,608 INFO L93 Difference]: Finished difference Result 1995 states and 5040 transitions. [2020-11-11 15:12:22,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:12:22,609 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-11-11 15:12:22,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:22,614 INFO L225 Difference]: With dead ends: 1995 [2020-11-11 15:12:22,614 INFO L226 Difference]: Without dead ends: 1725 [2020-11-11 15:12:22,615 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:12:22,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2020-11-11 15:12:22,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1327. [2020-11-11 15:12:22,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 2.6968325791855206) internal successors, (3576), 1326 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:22,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 3576 transitions. [2020-11-11 15:12:22,663 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 3576 transitions. Word has length 56 [2020-11-11 15:12:22,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:22,663 INFO L481 AbstractCegarLoop]: Abstraction has 1327 states and 3576 transitions. [2020-11-11 15:12:22,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:22,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 3576 transitions. [2020-11-11 15:12:22,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:12:22,666 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:22,666 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:22,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-11 15:12:22,880 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:22,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:22,880 INFO L82 PathProgramCache]: Analyzing trace with hash -713310411, now seen corresponding path program 13 times [2020-11-11 15:12:22,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:22,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727217691] [2020-11-11 15:12:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:23,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727217691] [2020-11-11 15:12:23,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574806497] [2020-11-11 15:12:23,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:23,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:12:23,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:23,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:23,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:23,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-11 15:12:23,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042188278] [2020-11-11 15:12:23,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:12:23,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:23,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:12:23,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:12:23,189 INFO L87 Difference]: Start difference. First operand 1327 states and 3576 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:23,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:23,506 INFO L93 Difference]: Finished difference Result 2020 states and 5140 transitions. [2020-11-11 15:12:23,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 15:12:23,506 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-11-11 15:12:23,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:23,511 INFO L225 Difference]: With dead ends: 2020 [2020-11-11 15:12:23,511 INFO L226 Difference]: Without dead ends: 1750 [2020-11-11 15:12:23,511 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:12:23,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2020-11-11 15:12:23,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1377. [2020-11-11 15:12:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1376 states have (on average 2.707848837209302) internal successors, (3726), 1376 states have internal predecessors, (3726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:23,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 3726 transitions. [2020-11-11 15:12:23,551 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 3726 transitions. Word has length 56 [2020-11-11 15:12:23,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:23,551 INFO L481 AbstractCegarLoop]: Abstraction has 1377 states and 3726 transitions. [2020-11-11 15:12:23,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:23,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 3726 transitions. [2020-11-11 15:12:23,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:12:23,555 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:23,555 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:23,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-11 15:12:23,769 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:23,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:23,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1118222373, now seen corresponding path program 14 times [2020-11-11 15:12:23,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:23,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849122485] [2020-11-11 15:12:23,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:23,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849122485] [2020-11-11 15:12:23,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524816241] [2020-11-11 15:12:23,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:24,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:24,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:24,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:12:24,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:24,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:24,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:24,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:24,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-11-11 15:12:24,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312921748] [2020-11-11 15:12:24,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:12:24,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:24,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:12:24,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:12:24,113 INFO L87 Difference]: Start difference. First operand 1377 states and 3726 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:24,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:24,626 INFO L93 Difference]: Finished difference Result 2065 states and 5310 transitions. [2020-11-11 15:12:24,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:12:24,626 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-11-11 15:12:24,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:24,631 INFO L225 Difference]: With dead ends: 2065 [2020-11-11 15:12:24,631 INFO L226 Difference]: Without dead ends: 1795 [2020-11-11 15:12:24,632 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:12:24,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2020-11-11 15:12:24,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1427. [2020-11-11 15:12:24,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1426 states have (on average 2.728611500701262) internal successors, (3891), 1426 states have internal predecessors, (3891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:24,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 3891 transitions. [2020-11-11 15:12:24,671 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 3891 transitions. Word has length 56 [2020-11-11 15:12:24,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:24,671 INFO L481 AbstractCegarLoop]: Abstraction has 1427 states and 3891 transitions. [2020-11-11 15:12:24,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:24,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 3891 transitions. [2020-11-11 15:12:24,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:12:24,674 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:24,674 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:24,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-11 15:12:24,887 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:24,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:24,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1747013875, now seen corresponding path program 15 times [2020-11-11 15:12:24,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:24,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902017638] [2020-11-11 15:12:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:25,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902017638] [2020-11-11 15:12:25,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061869823] [2020-11-11 15:12:25,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:25,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 15:12:25,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:25,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:12:25,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:25,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:25,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:25,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-11 15:12:25,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460761554] [2020-11-11 15:12:25,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:12:25,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:25,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:12:25,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:12:25,192 INFO L87 Difference]: Start difference. First operand 1427 states and 3891 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:25,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:25,605 INFO L93 Difference]: Finished difference Result 3152 states and 8444 transitions. [2020-11-11 15:12:25,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:12:25,606 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-11-11 15:12:25,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:25,613 INFO L225 Difference]: With dead ends: 3152 [2020-11-11 15:12:25,613 INFO L226 Difference]: Without dead ends: 2882 [2020-11-11 15:12:25,614 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:12:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2020-11-11 15:12:25,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 1552. [2020-11-11 15:12:25,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 2.7607994842037393) internal successors, (4282), 1551 states have internal predecessors, (4282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:25,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 4282 transitions. [2020-11-11 15:12:25,667 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 4282 transitions. Word has length 56 [2020-11-11 15:12:25,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:25,667 INFO L481 AbstractCegarLoop]: Abstraction has 1552 states and 4282 transitions. [2020-11-11 15:12:25,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:25,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 4282 transitions. [2020-11-11 15:12:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:12:25,670 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:25,670 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:25,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-11 15:12:25,885 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:25,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:25,885 INFO L82 PathProgramCache]: Analyzing trace with hash -836745467, now seen corresponding path program 16 times [2020-11-11 15:12:25,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:25,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223968503] [2020-11-11 15:12:25,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:26,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223968503] [2020-11-11 15:12:26,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578687323] [2020-11-11 15:12:26,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:26,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:26,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:26,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:12:26,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:26,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:26,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:26,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:26,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-11-11 15:12:26,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868609912] [2020-11-11 15:12:26,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:12:26,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:26,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:12:26,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:12:26,157 INFO L87 Difference]: Start difference. First operand 1552 states and 4282 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:26,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:26,807 INFO L93 Difference]: Finished difference Result 2607 states and 6840 transitions. [2020-11-11 15:12:26,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:12:26,807 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-11-11 15:12:26,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:26,811 INFO L225 Difference]: With dead ends: 2607 [2020-11-11 15:12:26,811 INFO L226 Difference]: Without dead ends: 2080 [2020-11-11 15:12:26,812 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2020-11-11 15:12:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2020-11-11 15:12:26,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1562. [2020-11-11 15:12:26,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 2.7456758488148623) internal successors, (4286), 1561 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:26,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4286 transitions. [2020-11-11 15:12:26,846 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4286 transitions. Word has length 56 [2020-11-11 15:12:26,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:26,846 INFO L481 AbstractCegarLoop]: Abstraction has 1562 states and 4286 transitions. [2020-11-11 15:12:26,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:26,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4286 transitions. [2020-11-11 15:12:26,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:12:26,849 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:26,850 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:27,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-11 15:12:27,066 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:27,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:27,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1823983856, now seen corresponding path program 17 times [2020-11-11 15:12:27,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:27,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965525222] [2020-11-11 15:12:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:27,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965525222] [2020-11-11 15:12:27,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359848333] [2020-11-11 15:12:27,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:27,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 15:12:27,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:27,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:12:27,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:27,329 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:27,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:27,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-11 15:12:27,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984511114] [2020-11-11 15:12:27,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:12:27,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:27,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:12:27,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:12:27,348 INFO L87 Difference]: Start difference. First operand 1562 states and 4286 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:27,670 INFO L93 Difference]: Finished difference Result 2205 states and 5700 transitions. [2020-11-11 15:12:27,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:12:27,671 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2020-11-11 15:12:27,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:27,675 INFO L225 Difference]: With dead ends: 2205 [2020-11-11 15:12:27,675 INFO L226 Difference]: Without dead ends: 1935 [2020-11-11 15:12:27,676 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:12:27,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2020-11-11 15:12:27,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1562. [2020-11-11 15:12:27,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 2.7456758488148623) internal successors, (4286), 1561 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:27,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4286 transitions. [2020-11-11 15:12:27,715 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4286 transitions. Word has length 61 [2020-11-11 15:12:27,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:27,716 INFO L481 AbstractCegarLoop]: Abstraction has 1562 states and 4286 transitions. [2020-11-11 15:12:27,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:27,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4286 transitions. [2020-11-11 15:12:27,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:12:27,721 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:27,721 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:27,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:27,936 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:27,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:27,936 INFO L82 PathProgramCache]: Analyzing trace with hash 931447808, now seen corresponding path program 18 times [2020-11-11 15:12:27,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:27,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422335609] [2020-11-11 15:12:27,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:28,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422335609] [2020-11-11 15:12:28,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740584692] [2020-11-11 15:12:28,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:28,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 15:12:28,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:28,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:12:28,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:28,209 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:28,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:28,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:28,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-11 15:12:28,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921592047] [2020-11-11 15:12:28,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:12:28,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:28,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:12:28,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:12:28,234 INFO L87 Difference]: Start difference. First operand 1562 states and 4286 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:28,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:28,684 INFO L93 Difference]: Finished difference Result 2300 states and 5890 transitions. [2020-11-11 15:12:28,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:12:28,685 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2020-11-11 15:12:28,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:28,689 INFO L225 Difference]: With dead ends: 2300 [2020-11-11 15:12:28,689 INFO L226 Difference]: Without dead ends: 2030 [2020-11-11 15:12:28,690 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:12:28,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2020-11-11 15:12:28,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 1562. [2020-11-11 15:12:28,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 2.7456758488148623) internal successors, (4286), 1561 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:28,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4286 transitions. [2020-11-11 15:12:28,733 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4286 transitions. Word has length 61 [2020-11-11 15:12:28,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:28,733 INFO L481 AbstractCegarLoop]: Abstraction has 1562 states and 4286 transitions. [2020-11-11 15:12:28,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:28,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4286 transitions. [2020-11-11 15:12:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:12:28,737 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:28,737 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:28,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:28,952 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:28,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:28,953 INFO L82 PathProgramCache]: Analyzing trace with hash -425118898, now seen corresponding path program 19 times [2020-11-11 15:12:28,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:28,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859746234] [2020-11-11 15:12:28,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:29,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859746234] [2020-11-11 15:12:29,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48063883] [2020-11-11 15:12:29,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:29,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:12:29,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:29,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:29,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:29,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-11 15:12:29,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758492526] [2020-11-11 15:12:29,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:12:29,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:29,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:12:29,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:12:29,229 INFO L87 Difference]: Start difference. First operand 1562 states and 4286 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:29,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:29,626 INFO L93 Difference]: Finished difference Result 2255 states and 5800 transitions. [2020-11-11 15:12:29,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 15:12:29,627 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2020-11-11 15:12:29,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:29,631 INFO L225 Difference]: With dead ends: 2255 [2020-11-11 15:12:29,631 INFO L226 Difference]: Without dead ends: 1985 [2020-11-11 15:12:29,632 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:12:29,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2020-11-11 15:12:29,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1562. [2020-11-11 15:12:29,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 2.7456758488148623) internal successors, (4286), 1561 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:29,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4286 transitions. [2020-11-11 15:12:29,674 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4286 transitions. Word has length 61 [2020-11-11 15:12:29,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:29,675 INFO L481 AbstractCegarLoop]: Abstraction has 1562 states and 4286 transitions. [2020-11-11 15:12:29,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:29,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4286 transitions. [2020-11-11 15:12:29,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:12:29,678 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:29,678 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:29,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:29,894 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:29,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:29,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1406413886, now seen corresponding path program 20 times [2020-11-11 15:12:29,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:29,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426516389] [2020-11-11 15:12:29,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:30,091 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:30,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426516389] [2020-11-11 15:12:30,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036896976] [2020-11-11 15:12:30,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:30,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:30,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:30,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:12:30,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:30,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:30,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:30,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:30,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-11 15:12:30,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376931636] [2020-11-11 15:12:30,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:12:30,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:30,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:12:30,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:12:30,212 INFO L87 Difference]: Start difference. First operand 1562 states and 4286 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:30,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:30,772 INFO L93 Difference]: Finished difference Result 2250 states and 5810 transitions. [2020-11-11 15:12:30,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:12:30,772 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2020-11-11 15:12:30,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:30,775 INFO L225 Difference]: With dead ends: 2250 [2020-11-11 15:12:30,776 INFO L226 Difference]: Without dead ends: 1980 [2020-11-11 15:12:30,776 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:12:30,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2020-11-11 15:12:30,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1562. [2020-11-11 15:12:30,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 2.7488789237668163) internal successors, (4291), 1561 states have internal predecessors, (4291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:30,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4291 transitions. [2020-11-11 15:12:30,814 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4291 transitions. Word has length 61 [2020-11-11 15:12:30,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:30,814 INFO L481 AbstractCegarLoop]: Abstraction has 1562 states and 4291 transitions. [2020-11-11 15:12:30,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:30,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4291 transitions. [2020-11-11 15:12:30,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:12:30,817 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:30,818 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:31,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-11 15:12:31,033 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:31,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:31,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2035205388, now seen corresponding path program 21 times [2020-11-11 15:12:31,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:31,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393315235] [2020-11-11 15:12:31,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:31,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393315235] [2020-11-11 15:12:31,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595618184] [2020-11-11 15:12:31,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:31,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 15:12:31,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:31,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:12:31,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:31,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:31,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:31,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-11 15:12:31,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852360696] [2020-11-11 15:12:31,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:12:31,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:31,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:12:31,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:12:31,293 INFO L87 Difference]: Start difference. First operand 1562 states and 4291 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:31,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:31,745 INFO L93 Difference]: Finished difference Result 3312 states and 8894 transitions. [2020-11-11 15:12:31,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:12:31,746 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2020-11-11 15:12:31,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:31,750 INFO L225 Difference]: With dead ends: 3312 [2020-11-11 15:12:31,750 INFO L226 Difference]: Without dead ends: 3042 [2020-11-11 15:12:31,751 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:12:31,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2020-11-11 15:12:31,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 1687. [2020-11-11 15:12:31,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 2.7769869513641754) internal successors, (4682), 1686 states have internal predecessors, (4682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:31,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 4682 transitions. [2020-11-11 15:12:31,797 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 4682 transitions. Word has length 61 [2020-11-11 15:12:31,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:31,798 INFO L481 AbstractCegarLoop]: Abstraction has 1687 states and 4682 transitions. [2020-11-11 15:12:31,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:31,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 4682 transitions. [2020-11-11 15:12:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:12:31,801 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:31,801 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:32,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:32,016 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:32,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:32,017 INFO L82 PathProgramCache]: Analyzing trace with hash -548553954, now seen corresponding path program 22 times [2020-11-11 15:12:32,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:32,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822896899] [2020-11-11 15:12:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:32,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822896899] [2020-11-11 15:12:32,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434922838] [2020-11-11 15:12:32,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:32,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:32,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:32,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:12:32,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:32,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:32,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:32,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:32,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-11 15:12:32,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951235264] [2020-11-11 15:12:32,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:12:32,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:32,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:12:32,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:12:32,283 INFO L87 Difference]: Start difference. First operand 1687 states and 4682 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:32,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:32,932 INFO L93 Difference]: Finished difference Result 2326 states and 6200 transitions. [2020-11-11 15:12:32,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:12:32,932 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2020-11-11 15:12:32,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:32,936 INFO L225 Difference]: With dead ends: 2326 [2020-11-11 15:12:32,936 INFO L226 Difference]: Without dead ends: 1915 [2020-11-11 15:12:32,937 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:12:32,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2020-11-11 15:12:32,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1637. [2020-11-11 15:12:32,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 2.772616136919315) internal successors, (4536), 1636 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:32,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 4536 transitions. [2020-11-11 15:12:32,984 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 4536 transitions. Word has length 61 [2020-11-11 15:12:32,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:32,985 INFO L481 AbstractCegarLoop]: Abstraction has 1637 states and 4536 transitions. [2020-11-11 15:12:32,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:32,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 4536 transitions. [2020-11-11 15:12:32,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:12:32,989 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:32,989 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:33,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-11 15:12:33,204 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:33,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:33,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1466794138, now seen corresponding path program 23 times [2020-11-11 15:12:33,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:33,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685174457] [2020-11-11 15:12:33,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:33,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685174457] [2020-11-11 15:12:33,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547546659] [2020-11-11 15:12:33,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:33,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 15:12:33,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:33,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:12:33,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:33,572 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:33,613 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:33,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:33,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2020-11-11 15:12:33,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698636515] [2020-11-11 15:12:33,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:12:33,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:33,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:12:33,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:33,625 INFO L87 Difference]: Start difference. First operand 1637 states and 4536 transitions. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:34,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:34,090 INFO L93 Difference]: Finished difference Result 2605 states and 6920 transitions. [2020-11-11 15:12:34,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:12:34,090 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-11 15:12:34,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:34,094 INFO L225 Difference]: With dead ends: 2605 [2020-11-11 15:12:34,094 INFO L226 Difference]: Without dead ends: 2271 [2020-11-11 15:12:34,094 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:12:34,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2020-11-11 15:12:34,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 1722. [2020-11-11 15:12:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1721 states have (on average 2.7344567112144103) internal successors, (4706), 1721 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:34,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 4706 transitions. [2020-11-11 15:12:34,134 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 4706 transitions. Word has length 66 [2020-11-11 15:12:34,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:34,134 INFO L481 AbstractCegarLoop]: Abstraction has 1722 states and 4706 transitions. [2020-11-11 15:12:34,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:34,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 4706 transitions. [2020-11-11 15:12:34,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:12:34,137 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:34,138 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:34,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:34,348 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:34,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:34,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1504782136, now seen corresponding path program 24 times [2020-11-11 15:12:34,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:34,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761034619] [2020-11-11 15:12:34,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:34,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761034619] [2020-11-11 15:12:34,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458981440] [2020-11-11 15:12:34,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:34,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 15:12:34,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:34,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:12:34,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:34,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:34,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:34,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:12:34,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944213113] [2020-11-11 15:12:34,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:12:34,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:34,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:12:34,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:34,699 INFO L87 Difference]: Start difference. First operand 1722 states and 4706 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:35,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:35,039 INFO L93 Difference]: Finished difference Result 2670 states and 6730 transitions. [2020-11-11 15:12:35,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 15:12:35,040 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-11 15:12:35,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:35,044 INFO L225 Difference]: With dead ends: 2670 [2020-11-11 15:12:35,044 INFO L226 Difference]: Without dead ends: 2400 [2020-11-11 15:12:35,045 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:12:35,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2020-11-11 15:12:35,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1737. [2020-11-11 15:12:35,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 2.728110599078341) internal successors, (4736), 1736 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:35,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 4736 transitions. [2020-11-11 15:12:35,085 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 4736 transitions. Word has length 66 [2020-11-11 15:12:35,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:35,085 INFO L481 AbstractCegarLoop]: Abstraction has 1737 states and 4736 transitions. [2020-11-11 15:12:35,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:35,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 4736 transitions. [2020-11-11 15:12:35,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:12:35,090 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:35,090 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:35,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-11 15:12:35,304 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:35,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:35,305 INFO L82 PathProgramCache]: Analyzing trace with hash -676070984, now seen corresponding path program 25 times [2020-11-11 15:12:35,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:35,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184998787] [2020-11-11 15:12:35,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:35,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184998787] [2020-11-11 15:12:35,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136387729] [2020-11-11 15:12:35,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:35,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:12:35,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:35,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:35,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:35,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:35,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-11 15:12:35,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118236754] [2020-11-11 15:12:35,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:12:35,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:35,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:12:35,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:12:35,660 INFO L87 Difference]: Start difference. First operand 1737 states and 4736 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:36,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:36,098 INFO L93 Difference]: Finished difference Result 2555 states and 6500 transitions. [2020-11-11 15:12:36,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:12:36,101 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-11 15:12:36,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:36,104 INFO L225 Difference]: With dead ends: 2555 [2020-11-11 15:12:36,104 INFO L226 Difference]: Without dead ends: 2285 [2020-11-11 15:12:36,104 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:12:36,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2020-11-11 15:12:36,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 1737. [2020-11-11 15:12:36,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 2.728110599078341) internal successors, (4736), 1736 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:36,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 4736 transitions. [2020-11-11 15:12:36,141 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 4736 transitions. Word has length 66 [2020-11-11 15:12:36,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:36,142 INFO L481 AbstractCegarLoop]: Abstraction has 1737 states and 4736 transitions. [2020-11-11 15:12:36,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:36,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 4736 transitions. [2020-11-11 15:12:36,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:12:36,144 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:36,144 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:36,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:36,357 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:36,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:36,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1896357766, now seen corresponding path program 26 times [2020-11-11 15:12:36,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:36,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370682449] [2020-11-11 15:12:36,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:36,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370682449] [2020-11-11 15:12:36,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131201385] [2020-11-11 15:12:36,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:36,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:36,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:36,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:12:36,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:36,654 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:36,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:36,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:12:36,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134892681] [2020-11-11 15:12:36,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:12:36,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:36,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:12:36,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:36,663 INFO L87 Difference]: Start difference. First operand 1737 states and 4736 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:37,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:37,052 INFO L93 Difference]: Finished difference Result 2530 states and 6450 transitions. [2020-11-11 15:12:37,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:12:37,053 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-11 15:12:37,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:37,058 INFO L225 Difference]: With dead ends: 2530 [2020-11-11 15:12:37,058 INFO L226 Difference]: Without dead ends: 2260 [2020-11-11 15:12:37,059 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:12:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2020-11-11 15:12:37,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 1737. [2020-11-11 15:12:37,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 2.728110599078341) internal successors, (4736), 1736 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:37,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 4736 transitions. [2020-11-11 15:12:37,102 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 4736 transitions. Word has length 66 [2020-11-11 15:12:37,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:37,103 INFO L481 AbstractCegarLoop]: Abstraction has 1737 states and 4736 transitions. [2020-11-11 15:12:37,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:37,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 4736 transitions. [2020-11-11 15:12:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:12:37,106 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:37,106 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:37,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-11 15:12:37,320 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:37,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:37,321 INFO L82 PathProgramCache]: Analyzing trace with hash 356822134, now seen corresponding path program 27 times [2020-11-11 15:12:37,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:37,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105699920] [2020-11-11 15:12:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:37,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105699920] [2020-11-11 15:12:37,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467446029] [2020-11-11 15:12:37,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:37,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 15:12:37,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:37,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:12:37,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:37,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:37,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:37,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:37,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-11 15:12:37,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325376914] [2020-11-11 15:12:37,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:12:37,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:37,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:12:37,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:12:37,761 INFO L87 Difference]: Start difference. First operand 1737 states and 4736 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:38,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:38,346 INFO L93 Difference]: Finished difference Result 2480 states and 6350 transitions. [2020-11-11 15:12:38,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:12:38,346 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-11 15:12:38,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:38,349 INFO L225 Difference]: With dead ends: 2480 [2020-11-11 15:12:38,350 INFO L226 Difference]: Without dead ends: 2210 [2020-11-11 15:12:38,350 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:12:38,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2020-11-11 15:12:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1737. [2020-11-11 15:12:38,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 2.728110599078341) internal successors, (4736), 1736 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:38,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 4736 transitions. [2020-11-11 15:12:38,387 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 4736 transitions. Word has length 66 [2020-11-11 15:12:38,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:38,387 INFO L481 AbstractCegarLoop]: Abstraction has 1737 states and 4736 transitions. [2020-11-11 15:12:38,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:38,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 4736 transitions. [2020-11-11 15:12:38,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:12:38,389 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:38,390 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:38,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-11 15:12:38,590 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:38,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:38,591 INFO L82 PathProgramCache]: Analyzing trace with hash -999744572, now seen corresponding path program 28 times [2020-11-11 15:12:38,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:38,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951028857] [2020-11-11 15:12:38,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:38,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951028857] [2020-11-11 15:12:38,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823755421] [2020-11-11 15:12:38,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:38,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:38,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:38,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:12:38,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:38,897 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:38,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:38,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:12:38,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293821175] [2020-11-11 15:12:38,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:12:38,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:38,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:12:38,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:38,906 INFO L87 Difference]: Start difference. First operand 1737 states and 4736 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:39,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:39,364 INFO L93 Difference]: Finished difference Result 2430 states and 6250 transitions. [2020-11-11 15:12:39,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 15:12:39,365 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-11 15:12:39,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:39,369 INFO L225 Difference]: With dead ends: 2430 [2020-11-11 15:12:39,369 INFO L226 Difference]: Without dead ends: 2160 [2020-11-11 15:12:39,370 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:12:39,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2020-11-11 15:12:39,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1737. [2020-11-11 15:12:39,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 2.728110599078341) internal successors, (4736), 1736 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:39,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 4736 transitions. [2020-11-11 15:12:39,407 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 4736 transitions. Word has length 66 [2020-11-11 15:12:39,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:39,408 INFO L481 AbstractCegarLoop]: Abstraction has 1737 states and 4736 transitions. [2020-11-11 15:12:39,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:39,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 4736 transitions. [2020-11-11 15:12:39,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:12:39,411 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:39,411 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:39,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-11 15:12:39,626 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:39,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:39,626 INFO L82 PathProgramCache]: Analyzing trace with hash 831788212, now seen corresponding path program 29 times [2020-11-11 15:12:39,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:39,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022931582] [2020-11-11 15:12:39,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:39,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:39,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022931582] [2020-11-11 15:12:39,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405298340] [2020-11-11 15:12:39,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:39,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 15:12:39,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:39,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:12:39,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:39,956 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:39,991 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:40,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:40,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-11 15:12:40,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444382050] [2020-11-11 15:12:40,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:12:40,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:40,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:12:40,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:12:40,020 INFO L87 Difference]: Start difference. First operand 1737 states and 4736 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:40,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:40,817 INFO L93 Difference]: Finished difference Result 2809 states and 7284 transitions. [2020-11-11 15:12:40,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:12:40,818 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-11 15:12:40,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:40,822 INFO L225 Difference]: With dead ends: 2809 [2020-11-11 15:12:40,823 INFO L226 Difference]: Without dead ends: 2240 [2020-11-11 15:12:40,824 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:12:40,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2240 states. [2020-11-11 15:12:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2240 to 1677. [2020-11-11 15:12:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 2.7392601431980905) internal successors, (4591), 1676 states have internal predecessors, (4591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 4591 transitions. [2020-11-11 15:12:40,866 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 4591 transitions. Word has length 66 [2020-11-11 15:12:40,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:40,867 INFO L481 AbstractCegarLoop]: Abstraction has 1677 states and 4591 transitions. [2020-11-11 15:12:40,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:40,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 4591 transitions. [2020-11-11 15:12:40,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:12:40,870 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:40,870 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:41,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-11 15:12:41,086 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:41,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:41,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1460579714, now seen corresponding path program 30 times [2020-11-11 15:12:41,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:41,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556058493] [2020-11-11 15:12:41,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:41,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556058493] [2020-11-11 15:12:41,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111080701] [2020-11-11 15:12:41,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:41,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 15:12:41,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:41,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:12:41,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:41,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:41,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:41,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:12:41,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665803188] [2020-11-11 15:12:41,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:12:41,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:41,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:12:41,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:41,381 INFO L87 Difference]: Start difference. First operand 1677 states and 4591 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:41,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:41,915 INFO L93 Difference]: Finished difference Result 3452 states and 9244 transitions. [2020-11-11 15:12:41,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:12:41,916 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-11 15:12:41,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:41,922 INFO L225 Difference]: With dead ends: 3452 [2020-11-11 15:12:41,922 INFO L226 Difference]: Without dead ends: 3182 [2020-11-11 15:12:41,923 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:12:41,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2020-11-11 15:12:41,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 1802. [2020-11-11 15:12:41,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1801 states have (on average 2.7662409772348697) internal successors, (4982), 1801 states have internal predecessors, (4982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:41,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 4982 transitions. [2020-11-11 15:12:41,987 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 4982 transitions. Word has length 66 [2020-11-11 15:12:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:41,988 INFO L481 AbstractCegarLoop]: Abstraction has 1802 states and 4982 transitions. [2020-11-11 15:12:41,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:41,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 4982 transitions. [2020-11-11 15:12:41,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:12:41,993 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:41,993 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:42,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:42,206 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:42,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:42,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1123179628, now seen corresponding path program 31 times [2020-11-11 15:12:42,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:42,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010270868] [2020-11-11 15:12:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:42,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010270868] [2020-11-11 15:12:42,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630552514] [2020-11-11 15:12:42,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:42,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:12:42,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:42,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:42,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:42,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:42,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:12:42,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428956844] [2020-11-11 15:12:42,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:12:42,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:42,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:12:42,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:42,509 INFO L87 Difference]: Start difference. First operand 1802 states and 4982 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:43,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:43,275 INFO L93 Difference]: Finished difference Result 2491 states and 6600 transitions. [2020-11-11 15:12:43,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:12:43,276 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-11 15:12:43,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:43,280 INFO L225 Difference]: With dead ends: 2491 [2020-11-11 15:12:43,281 INFO L226 Difference]: Without dead ends: 2080 [2020-11-11 15:12:43,281 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 15:12:43,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2020-11-11 15:12:43,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1452. [2020-11-11 15:12:43,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 2.7057201929703654) internal successors, (3926), 1451 states have internal predecessors, (3926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:43,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 3926 transitions. [2020-11-11 15:12:43,310 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 3926 transitions. Word has length 66 [2020-11-11 15:12:43,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:43,310 INFO L481 AbstractCegarLoop]: Abstraction has 1452 states and 3926 transitions. [2020-11-11 15:12:43,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:43,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 3926 transitions. [2020-11-11 15:12:43,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:12:43,313 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:43,313 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:43,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-11-11 15:12:43,514 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:43,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:43,515 INFO L82 PathProgramCache]: Analyzing trace with hash 244367777, now seen corresponding path program 32 times [2020-11-11 15:12:43,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:43,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142607421] [2020-11-11 15:12:43,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:43,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142607421] [2020-11-11 15:12:43,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517935955] [2020-11-11 15:12:43,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:43,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:43,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:43,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:12:43,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:43,828 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:43,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:43,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 15:12:43,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352119920] [2020-11-11 15:12:43,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:12:43,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:43,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:12:43,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:43,838 INFO L87 Difference]: Start difference. First operand 1452 states and 3926 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:44,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:44,256 INFO L93 Difference]: Finished difference Result 2245 states and 5690 transitions. [2020-11-11 15:12:44,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:12:44,256 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-11-11 15:12:44,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:44,260 INFO L225 Difference]: With dead ends: 2245 [2020-11-11 15:12:44,260 INFO L226 Difference]: Without dead ends: 1975 [2020-11-11 15:12:44,261 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:12:44,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2020-11-11 15:12:44,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1502. [2020-11-11 15:12:44,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 2.7155229846768822) internal successors, (4076), 1501 states have internal predecessors, (4076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:44,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 4076 transitions. [2020-11-11 15:12:44,298 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 4076 transitions. Word has length 71 [2020-11-11 15:12:44,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:44,299 INFO L481 AbstractCegarLoop]: Abstraction has 1502 states and 4076 transitions. [2020-11-11 15:12:44,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:44,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 4076 transitions. [2020-11-11 15:12:44,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:12:44,301 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:44,302 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:44,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-11 15:12:44,515 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:44,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:44,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1073078929, now seen corresponding path program 33 times [2020-11-11 15:12:44,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:44,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527160980] [2020-11-11 15:12:44,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:44,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527160980] [2020-11-11 15:12:44,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291720519] [2020-11-11 15:12:44,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:44,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 15:12:44,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:44,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:12:44,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:44,858 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:44,879 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:44,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:44,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 15:12:44,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374271635] [2020-11-11 15:12:44,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:12:44,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:44,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:12:44,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:12:44,899 INFO L87 Difference]: Start difference. First operand 1502 states and 4076 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:45,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:45,443 INFO L93 Difference]: Finished difference Result 2440 states and 6130 transitions. [2020-11-11 15:12:45,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:12:45,444 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-11-11 15:12:45,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:45,448 INFO L225 Difference]: With dead ends: 2440 [2020-11-11 15:12:45,448 INFO L226 Difference]: Without dead ends: 2170 [2020-11-11 15:12:45,449 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:12:45,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2020-11-11 15:12:45,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1552. [2020-11-11 15:12:45,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 2.7246937459703418) internal successors, (4226), 1551 states have internal predecessors, (4226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:45,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 4226 transitions. [2020-11-11 15:12:45,476 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 4226 transitions. Word has length 71 [2020-11-11 15:12:45,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:45,476 INFO L481 AbstractCegarLoop]: Abstraction has 1552 states and 4226 transitions. [2020-11-11 15:12:45,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:45,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 4226 transitions. [2020-11-11 15:12:45,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:12:45,478 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:45,478 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:45,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:45,679 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:45,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:45,680 INFO L82 PathProgramCache]: Analyzing trace with hash -649459617, now seen corresponding path program 34 times [2020-11-11 15:12:45,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:45,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095257957] [2020-11-11 15:12:45,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:45,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095257957] [2020-11-11 15:12:45,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950762260] [2020-11-11 15:12:45,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:45,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:45,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:45,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:12:45,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:45,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:45,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:45,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 15:12:45,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509269157] [2020-11-11 15:12:45,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:12:45,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:45,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:12:45,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:45,999 INFO L87 Difference]: Start difference. First operand 1552 states and 4226 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:46,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:46,478 INFO L93 Difference]: Finished difference Result 2445 states and 6190 transitions. [2020-11-11 15:12:46,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:12:46,479 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-11-11 15:12:46,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:46,482 INFO L225 Difference]: With dead ends: 2445 [2020-11-11 15:12:46,482 INFO L226 Difference]: Without dead ends: 2175 [2020-11-11 15:12:46,483 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:12:46,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2020-11-11 15:12:46,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1602. [2020-11-11 15:12:46,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1601 states have (on average 2.7332916926920676) internal successors, (4376), 1601 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 4376 transitions. [2020-11-11 15:12:46,519 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 4376 transitions. Word has length 71 [2020-11-11 15:12:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:46,519 INFO L481 AbstractCegarLoop]: Abstraction has 1602 states and 4376 transitions. [2020-11-11 15:12:46,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:46,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 4376 transitions. [2020-11-11 15:12:46,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:12:46,522 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:46,522 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:46,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-11 15:12:46,738 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:46,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:46,738 INFO L82 PathProgramCache]: Analyzing trace with hash 2105972047, now seen corresponding path program 35 times [2020-11-11 15:12:46,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:46,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569385949] [2020-11-11 15:12:46,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:46,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569385949] [2020-11-11 15:12:46,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5312799] [2020-11-11 15:12:46,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:47,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 15:12:47,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:47,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:12:47,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:47,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:47,104 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:47,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:47,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 15:12:47,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484560482] [2020-11-11 15:12:47,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:12:47,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:47,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:12:47,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:12:47,116 INFO L87 Difference]: Start difference. First operand 1602 states and 4376 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:47,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:47,716 INFO L93 Difference]: Finished difference Result 2445 states and 6240 transitions. [2020-11-11 15:12:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:12:47,716 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-11-11 15:12:47,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:47,720 INFO L225 Difference]: With dead ends: 2445 [2020-11-11 15:12:47,720 INFO L226 Difference]: Without dead ends: 2175 [2020-11-11 15:12:47,721 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:12:47,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2020-11-11 15:12:47,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1652. [2020-11-11 15:12:47,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1651 states have (on average 2.741368867353119) internal successors, (4526), 1651 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:47,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 4526 transitions. [2020-11-11 15:12:47,767 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 4526 transitions. Word has length 71 [2020-11-11 15:12:47,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:47,767 INFO L481 AbstractCegarLoop]: Abstraction has 1652 states and 4526 transitions. [2020-11-11 15:12:47,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:47,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 4526 transitions. [2020-11-11 15:12:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:12:47,770 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:47,771 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:47,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:47,984 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:47,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:47,984 INFO L82 PathProgramCache]: Analyzing trace with hash 749405341, now seen corresponding path program 36 times [2020-11-11 15:12:47,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:47,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847637884] [2020-11-11 15:12:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:48,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847637884] [2020-11-11 15:12:48,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237745537] [2020-11-11 15:12:48,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:48,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 15:12:48,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:48,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:12:48,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:48,286 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:48,296 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:48,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:48,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 15:12:48,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997547233] [2020-11-11 15:12:48,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:12:48,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:48,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:12:48,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:48,298 INFO L87 Difference]: Start difference. First operand 1652 states and 4526 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:48,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:48,849 INFO L93 Difference]: Finished difference Result 2445 states and 6290 transitions. [2020-11-11 15:12:48,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:12:48,849 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-11-11 15:12:48,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:48,854 INFO L225 Difference]: With dead ends: 2445 [2020-11-11 15:12:48,854 INFO L226 Difference]: Without dead ends: 2175 [2020-11-11 15:12:48,855 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:12:48,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2020-11-11 15:12:48,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1702. [2020-11-11 15:12:48,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 2.748971193415638) internal successors, (4676), 1701 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:48,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 4676 transitions. [2020-11-11 15:12:48,921 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 4676 transitions. Word has length 71 [2020-11-11 15:12:48,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:48,921 INFO L481 AbstractCegarLoop]: Abstraction has 1702 states and 4676 transitions. [2020-11-11 15:12:48,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:48,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 4676 transitions. [2020-11-11 15:12:48,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:12:48,925 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:48,925 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:49,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-11 15:12:49,141 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:49,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:49,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1714029171, now seen corresponding path program 37 times [2020-11-11 15:12:49,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:49,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504981801] [2020-11-11 15:12:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:49,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504981801] [2020-11-11 15:12:49,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155839749] [2020-11-11 15:12:49,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:49,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:12:49,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:49,450 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:49,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:49,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:49,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 15:12:49,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660192530] [2020-11-11 15:12:49,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:12:49,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:49,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:12:49,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:12:49,474 INFO L87 Difference]: Start difference. First operand 1702 states and 4676 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:50,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:50,203 INFO L93 Difference]: Finished difference Result 2490 states and 6460 transitions. [2020-11-11 15:12:50,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:12:50,203 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-11-11 15:12:50,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:50,206 INFO L225 Difference]: With dead ends: 2490 [2020-11-11 15:12:50,206 INFO L226 Difference]: Without dead ends: 2220 [2020-11-11 15:12:50,207 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=301, Invalid=889, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:12:50,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2020-11-11 15:12:50,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1752. [2020-11-11 15:12:50,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.764705882352941) internal successors, (4841), 1751 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 4841 transitions. [2020-11-11 15:12:50,239 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 4841 transitions. Word has length 71 [2020-11-11 15:12:50,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:50,239 INFO L481 AbstractCegarLoop]: Abstraction has 1752 states and 4841 transitions. [2020-11-11 15:12:50,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:50,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 4841 transitions. [2020-11-11 15:12:50,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:12:50,243 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:50,243 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:50,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-11 15:12:50,459 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:50,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:50,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1085237669, now seen corresponding path program 38 times [2020-11-11 15:12:50,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:50,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200473580] [2020-11-11 15:12:50,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:50,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200473580] [2020-11-11 15:12:50,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573535578] [2020-11-11 15:12:50,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:50,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:50,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:50,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:12:50,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:50,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:50,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:50,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 15:12:50,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855741055] [2020-11-11 15:12:50,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:12:50,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:50,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:12:50,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:12:50,794 INFO L87 Difference]: Start difference. First operand 1752 states and 4841 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:51,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:51,404 INFO L93 Difference]: Finished difference Result 3552 states and 9544 transitions. [2020-11-11 15:12:51,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:12:51,405 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-11-11 15:12:51,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:51,409 INFO L225 Difference]: With dead ends: 3552 [2020-11-11 15:12:51,410 INFO L226 Difference]: Without dead ends: 3282 [2020-11-11 15:12:51,410 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:12:51,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2020-11-11 15:12:51,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 1877. [2020-11-11 15:12:51,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 2.788912579957356) internal successors, (5232), 1876 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:51,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 5232 transitions. [2020-11-11 15:12:51,447 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 5232 transitions. Word has length 71 [2020-11-11 15:12:51,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:51,447 INFO L481 AbstractCegarLoop]: Abstraction has 1877 states and 5232 transitions. [2020-11-11 15:12:51,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:51,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 5232 transitions. [2020-11-11 15:12:51,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:12:51,449 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:51,449 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:51,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-11 15:12:51,650 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:51,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:51,651 INFO L82 PathProgramCache]: Analyzing trace with hash 625970285, now seen corresponding path program 39 times [2020-11-11 15:12:51,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:51,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936617239] [2020-11-11 15:12:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:51,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936617239] [2020-11-11 15:12:51,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628635212] [2020-11-11 15:12:51,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:51,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 15:12:51,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:51,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:12:51,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:51,976 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:51,992 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:52,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:52,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 15:12:52,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082337031] [2020-11-11 15:12:52,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:12:52,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:52,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:12:52,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:12:52,003 INFO L87 Difference]: Start difference. First operand 1877 states and 5232 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:52,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:52,743 INFO L93 Difference]: Finished difference Result 2566 states and 6850 transitions. [2020-11-11 15:12:52,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:12:52,744 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-11-11 15:12:52,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:52,748 INFO L225 Difference]: With dead ends: 2566 [2020-11-11 15:12:52,748 INFO L226 Difference]: Without dead ends: 2155 [2020-11-11 15:12:52,748 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:12:52,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2020-11-11 15:12:52,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1391. [2020-11-11 15:12:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 2.710791366906475) internal successors, (3768), 1390 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:52,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 3768 transitions. [2020-11-11 15:12:52,771 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 3768 transitions. Word has length 71 [2020-11-11 15:12:52,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:52,772 INFO L481 AbstractCegarLoop]: Abstraction has 1391 states and 3768 transitions. [2020-11-11 15:12:52,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:52,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 3768 transitions. [2020-11-11 15:12:52,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:12:52,774 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:52,774 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:52,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-11-11 15:12:52,975 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:52,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:52,976 INFO L82 PathProgramCache]: Analyzing trace with hash 582428331, now seen corresponding path program 40 times [2020-11-11 15:12:52,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:52,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34204233] [2020-11-11 15:12:52,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:53,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34204233] [2020-11-11 15:12:53,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905579275] [2020-11-11 15:12:53,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:53,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:53,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:53,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:12:53,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:53,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:53,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:53,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:53,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2020-11-11 15:12:53,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447562553] [2020-11-11 15:12:53,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:53,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:53,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:53,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:53,430 INFO L87 Difference]: Start difference. First operand 1391 states and 3768 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:53,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:53,983 INFO L93 Difference]: Finished difference Result 2409 states and 6252 transitions. [2020-11-11 15:12:53,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:12:53,984 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:12:53,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:53,988 INFO L225 Difference]: With dead ends: 2409 [2020-11-11 15:12:53,988 INFO L226 Difference]: Without dead ends: 2075 [2020-11-11 15:12:53,988 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:12:53,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2020-11-11 15:12:54,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1476. [2020-11-11 15:12:54,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 2.6698305084745764) internal successors, (3938), 1475 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:54,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 3938 transitions. [2020-11-11 15:12:54,017 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 3938 transitions. Word has length 76 [2020-11-11 15:12:54,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:54,017 INFO L481 AbstractCegarLoop]: Abstraction has 1476 states and 3938 transitions. [2020-11-11 15:12:54,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:54,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 3938 transitions. [2020-11-11 15:12:54,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:12:54,019 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:54,020 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:54,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:54,221 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:54,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:54,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1793236313, now seen corresponding path program 41 times [2020-11-11 15:12:54,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:54,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957768492] [2020-11-11 15:12:54,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:54,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957768492] [2020-11-11 15:12:54,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223527439] [2020-11-11 15:12:54,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:54,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 15:12:54,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:54,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:12:54,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:54,581 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:54,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:54,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:12:54,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486737708] [2020-11-11 15:12:54,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:12:54,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:54,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:12:54,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:12:54,600 INFO L87 Difference]: Start difference. First operand 1476 states and 3938 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:55,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:55,005 INFO L93 Difference]: Finished difference Result 2660 states and 6520 transitions. [2020-11-11 15:12:55,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:12:55,006 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:12:55,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:55,010 INFO L225 Difference]: With dead ends: 2660 [2020-11-11 15:12:55,010 INFO L226 Difference]: Without dead ends: 2390 [2020-11-11 15:12:55,011 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:12:55,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2020-11-11 15:12:55,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 1577. [2020-11-11 15:12:55,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1576 states have (on average 2.681472081218274) internal successors, (4226), 1576 states have internal predecessors, (4226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:55,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 4226 transitions. [2020-11-11 15:12:55,045 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 4226 transitions. Word has length 76 [2020-11-11 15:12:55,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:55,045 INFO L481 AbstractCegarLoop]: Abstraction has 1577 states and 4226 transitions. [2020-11-11 15:12:55,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:55,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 4226 transitions. [2020-11-11 15:12:55,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:12:55,047 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:55,047 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:55,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-11-11 15:12:55,248 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:55,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:55,249 INFO L82 PathProgramCache]: Analyzing trace with hash 247943753, now seen corresponding path program 42 times [2020-11-11 15:12:55,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:55,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616886527] [2020-11-11 15:12:55,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:55,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616886527] [2020-11-11 15:12:55,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192382767] [2020-11-11 15:12:55,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:55,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-11 15:12:55,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:55,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:12:55,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:55,632 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:55,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:55,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:55,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 15:12:55,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408155712] [2020-11-11 15:12:55,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:12:55,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:55,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:12:55,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:55,689 INFO L87 Difference]: Start difference. First operand 1577 states and 4226 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:56,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:56,230 INFO L93 Difference]: Finished difference Result 2595 states and 6440 transitions. [2020-11-11 15:12:56,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:12:56,230 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:12:56,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:56,234 INFO L225 Difference]: With dead ends: 2595 [2020-11-11 15:12:56,234 INFO L226 Difference]: Without dead ends: 2325 [2020-11-11 15:12:56,235 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:12:56,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2020-11-11 15:12:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 1627. [2020-11-11 15:12:56,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.6912669126691267) internal successors, (4376), 1626 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:56,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 4376 transitions. [2020-11-11 15:12:56,267 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 4376 transitions. Word has length 76 [2020-11-11 15:12:56,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:56,267 INFO L481 AbstractCegarLoop]: Abstraction has 1627 states and 4376 transitions. [2020-11-11 15:12:56,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:56,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 4376 transitions. [2020-11-11 15:12:56,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:12:56,271 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:56,271 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:56,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:56,486 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:56,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:56,486 INFO L82 PathProgramCache]: Analyzing trace with hash -319222121, now seen corresponding path program 43 times [2020-11-11 15:12:56,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:56,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314190003] [2020-11-11 15:12:56,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:56,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314190003] [2020-11-11 15:12:56,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530497136] [2020-11-11 15:12:56,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:56,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:12:56,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:56,845 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:56,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:56,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:12:56,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157747963] [2020-11-11 15:12:56,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:12:56,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:56,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:12:56,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:12:56,859 INFO L87 Difference]: Start difference. First operand 1627 states and 4376 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:57,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:57,361 INFO L93 Difference]: Finished difference Result 2620 states and 6540 transitions. [2020-11-11 15:12:57,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 15:12:57,361 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:12:57,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:57,365 INFO L225 Difference]: With dead ends: 2620 [2020-11-11 15:12:57,365 INFO L226 Difference]: Without dead ends: 2350 [2020-11-11 15:12:57,366 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:12:57,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-11-11 15:12:57,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1677. [2020-11-11 15:12:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 2.700477326968974) internal successors, (4526), 1676 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:57,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 4526 transitions. [2020-11-11 15:12:57,404 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 4526 transitions. Word has length 76 [2020-11-11 15:12:57,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:57,404 INFO L481 AbstractCegarLoop]: Abstraction has 1677 states and 4526 transitions. [2020-11-11 15:12:57,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:57,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 4526 transitions. [2020-11-11 15:12:57,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:12:57,406 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:57,406 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:57,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-11-11 15:12:57,622 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:57,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:57,622 INFO L82 PathProgramCache]: Analyzing trace with hash 509489031, now seen corresponding path program 44 times [2020-11-11 15:12:57,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:57,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278565147] [2020-11-11 15:12:57,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:57,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278565147] [2020-11-11 15:12:57,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182361805] [2020-11-11 15:12:57,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:57,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:57,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:57,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:12:57,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:57,978 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:58,024 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:58,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:58,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 15:12:58,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252820183] [2020-11-11 15:12:58,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:12:58,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:58,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:12:58,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:58,043 INFO L87 Difference]: Start difference. First operand 1677 states and 4526 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:58,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:58,702 INFO L93 Difference]: Finished difference Result 2620 states and 6590 transitions. [2020-11-11 15:12:58,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:12:58,702 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:12:58,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:58,707 INFO L225 Difference]: With dead ends: 2620 [2020-11-11 15:12:58,707 INFO L226 Difference]: Without dead ends: 2350 [2020-11-11 15:12:58,708 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:12:58,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-11-11 15:12:58,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1727. [2020-11-11 15:12:58,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 2.709154113557358) internal successors, (4676), 1726 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:58,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 4676 transitions. [2020-11-11 15:12:58,751 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 4676 transitions. Word has length 76 [2020-11-11 15:12:58,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:58,752 INFO L481 AbstractCegarLoop]: Abstraction has 1727 states and 4676 transitions. [2020-11-11 15:12:58,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:58,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 4676 transitions. [2020-11-11 15:12:58,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:12:58,756 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:58,756 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:12:58,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-11 15:12:58,971 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:58,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:58,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1213049515, now seen corresponding path program 45 times [2020-11-11 15:12:58,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:58,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21682879] [2020-11-11 15:12:58,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:59,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21682879] [2020-11-11 15:12:59,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582849362] [2020-11-11 15:12:59,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:59,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-11 15:12:59,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:59,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:12:59,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:59,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:12:59,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:59,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:12:59,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808914654] [2020-11-11 15:12:59,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:12:59,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:59,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:12:59,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:12:59,427 INFO L87 Difference]: Start difference. First operand 1727 states and 4676 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:59,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:59,995 INFO L93 Difference]: Finished difference Result 2620 states and 6640 transitions. [2020-11-11 15:12:59,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:12:59,996 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:12:59,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:00,000 INFO L225 Difference]: With dead ends: 2620 [2020-11-11 15:13:00,000 INFO L226 Difference]: Without dead ends: 2350 [2020-11-11 15:13:00,001 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:13:00,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-11-11 15:13:00,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1777. [2020-11-11 15:13:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1776 states have (on average 2.7173423423423424) internal successors, (4826), 1776 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:00,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 4826 transitions. [2020-11-11 15:13:00,044 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 4826 transitions. Word has length 76 [2020-11-11 15:13:00,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:00,045 INFO L481 AbstractCegarLoop]: Abstraction has 1777 states and 4826 transitions. [2020-11-11 15:13:00,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 4826 transitions. [2020-11-11 15:13:00,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:13:00,047 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:00,047 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:00,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:00,248 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:00,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:00,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1542382149, now seen corresponding path program 46 times [2020-11-11 15:13:00,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:00,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616669877] [2020-11-11 15:13:00,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:00,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616669877] [2020-11-11 15:13:00,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899110863] [2020-11-11 15:13:00,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:00,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:00,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:00,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:13:00,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:00,573 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:00,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:00,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:00,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 15:13:00,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026008854] [2020-11-11 15:13:00,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:13:00,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:00,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:13:00,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:13:00,640 INFO L87 Difference]: Start difference. First operand 1777 states and 4826 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:01,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:01,406 INFO L93 Difference]: Finished difference Result 2620 states and 6690 transitions. [2020-11-11 15:13:01,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:13:01,407 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:13:01,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:01,410 INFO L225 Difference]: With dead ends: 2620 [2020-11-11 15:13:01,410 INFO L226 Difference]: Without dead ends: 2350 [2020-11-11 15:13:01,411 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:13:01,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-11-11 15:13:01,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1827. [2020-11-11 15:13:01,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 2.725082146768894) internal successors, (4976), 1826 states have internal predecessors, (4976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 4976 transitions. [2020-11-11 15:13:01,443 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 4976 transitions. Word has length 76 [2020-11-11 15:13:01,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:01,444 INFO L481 AbstractCegarLoop]: Abstraction has 1827 states and 4976 transitions. [2020-11-11 15:13:01,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:01,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 4976 transitions. [2020-11-11 15:13:01,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:13:01,447 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:01,447 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:01,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-11 15:13:01,648 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:01,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:01,648 INFO L82 PathProgramCache]: Analyzing trace with hash 185815443, now seen corresponding path program 47 times [2020-11-11 15:13:01,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:01,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740546764] [2020-11-11 15:13:01,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:01,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740546764] [2020-11-11 15:13:01,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631661089] [2020-11-11 15:13:01,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:01,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 15:13:01,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:01,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:13:01,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:01,971 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:01,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:01,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:13:01,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63258301] [2020-11-11 15:13:01,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:13:01,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:01,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:13:01,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:13:01,981 INFO L87 Difference]: Start difference. First operand 1827 states and 4976 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:02,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:02,597 INFO L93 Difference]: Finished difference Result 2620 states and 6740 transitions. [2020-11-11 15:13:02,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:13:02,598 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:13:02,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:02,602 INFO L225 Difference]: With dead ends: 2620 [2020-11-11 15:13:02,602 INFO L226 Difference]: Without dead ends: 2350 [2020-11-11 15:13:02,603 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:13:02,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-11-11 15:13:02,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1877. [2020-11-11 15:13:02,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 2.732409381663113) internal successors, (5126), 1876 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 5126 transitions. [2020-11-11 15:13:02,634 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 5126 transitions. Word has length 76 [2020-11-11 15:13:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:02,634 INFO L481 AbstractCegarLoop]: Abstraction has 1877 states and 5126 transitions. [2020-11-11 15:13:02,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:02,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 5126 transitions. [2020-11-11 15:13:02,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:13:02,637 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:02,637 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:02,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-11 15:13:02,838 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:02,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:02,838 INFO L82 PathProgramCache]: Analyzing trace with hash 2017348227, now seen corresponding path program 48 times [2020-11-11 15:13:02,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:02,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560939567] [2020-11-11 15:13:02,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:03,045 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:03,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560939567] [2020-11-11 15:13:03,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710080656] [2020-11-11 15:13:03,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:03,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-11 15:13:03,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:03,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:13:03,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:03,164 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:03,204 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:03,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:03,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 15:13:03,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911188408] [2020-11-11 15:13:03,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:13:03,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:03,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:13:03,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:13:03,213 INFO L87 Difference]: Start difference. First operand 1877 states and 5126 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:04,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:04,098 INFO L93 Difference]: Finished difference Result 2665 states and 6910 transitions. [2020-11-11 15:13:04,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:13:04,099 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:13:04,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:04,103 INFO L225 Difference]: With dead ends: 2665 [2020-11-11 15:13:04,103 INFO L226 Difference]: Without dead ends: 2395 [2020-11-11 15:13:04,104 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=1104, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 15:13:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2020-11-11 15:13:04,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 1927. [2020-11-11 15:13:04,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1926 states have (on average 2.7471443406022846) internal successors, (5291), 1926 states have internal predecessors, (5291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:04,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 5291 transitions. [2020-11-11 15:13:04,137 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 5291 transitions. Word has length 76 [2020-11-11 15:13:04,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:04,137 INFO L481 AbstractCegarLoop]: Abstraction has 1927 states and 5291 transitions. [2020-11-11 15:13:04,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:04,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 5291 transitions. [2020-11-11 15:13:04,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:13:04,140 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:04,140 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:04,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-11 15:13:04,341 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:04,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:04,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1648827567, now seen corresponding path program 49 times [2020-11-11 15:13:04,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:04,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728874079] [2020-11-11 15:13:04,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:04,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728874079] [2020-11-11 15:13:04,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459491197] [2020-11-11 15:13:04,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:04,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:13:04,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:04,648 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:04,655 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:04,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:04,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:13:04,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509792851] [2020-11-11 15:13:04,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:13:04,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:04,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:13:04,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:13:04,657 INFO L87 Difference]: Start difference. First operand 1927 states and 5291 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:05,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:05,352 INFO L93 Difference]: Finished difference Result 3752 states and 10044 transitions. [2020-11-11 15:13:05,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:13:05,353 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:13:05,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:05,360 INFO L225 Difference]: With dead ends: 3752 [2020-11-11 15:13:05,360 INFO L226 Difference]: Without dead ends: 3482 [2020-11-11 15:13:05,361 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:13:05,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3482 states. [2020-11-11 15:13:05,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3482 to 2052. [2020-11-11 15:13:05,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 2.7703559239395417) internal successors, (5682), 2051 states have internal predecessors, (5682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:05,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 5682 transitions. [2020-11-11 15:13:05,405 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 5682 transitions. Word has length 76 [2020-11-11 15:13:05,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:05,405 INFO L481 AbstractCegarLoop]: Abstraction has 2052 states and 5682 transitions. [2020-11-11 15:13:05,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:05,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 5682 transitions. [2020-11-11 15:13:05,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:13:05,410 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:05,410 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:05,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:05,611 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:05,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:05,612 INFO L82 PathProgramCache]: Analyzing trace with hash 62380387, now seen corresponding path program 50 times [2020-11-11 15:13:05,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:05,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936094256] [2020-11-11 15:13:05,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:05,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936094256] [2020-11-11 15:13:05,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074029582] [2020-11-11 15:13:05,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:05,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:05,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:05,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:13:05,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:05,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:05,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:05,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:05,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 15:13:05,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107297961] [2020-11-11 15:13:05,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:13:05,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:05,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:13:05,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:13:05,952 INFO L87 Difference]: Start difference. First operand 2052 states and 5682 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:06,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:06,974 INFO L93 Difference]: Finished difference Result 3207 states and 8440 transitions. [2020-11-11 15:13:06,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:13:06,975 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-11 15:13:06,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:06,979 INFO L225 Difference]: With dead ends: 3207 [2020-11-11 15:13:06,979 INFO L226 Difference]: Without dead ends: 2680 [2020-11-11 15:13:06,979 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:13:06,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2020-11-11 15:13:07,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2062. [2020-11-11 15:13:07,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:07,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:13:07,010 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 76 [2020-11-11 15:13:07,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:07,010 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:13:07,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:07,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:13:07,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:13:07,013 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:07,013 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:07,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:07,218 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:07,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:07,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1380054286, now seen corresponding path program 51 times [2020-11-11 15:13:07,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:07,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992015482] [2020-11-11 15:13:07,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:07,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992015482] [2020-11-11 15:13:07,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67764804] [2020-11-11 15:13:07,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:07,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-11 15:13:07,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:07,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:13:07,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:07,639 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:07,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:07,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 15:13:07,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168163611] [2020-11-11 15:13:07,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:13:07,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:07,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:13:07,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:13:07,660 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:08,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:08,300 INFO L93 Difference]: Finished difference Result 2905 states and 7500 transitions. [2020-11-11 15:13:08,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:13:08,301 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-11-11 15:13:08,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:08,308 INFO L225 Difference]: With dead ends: 2905 [2020-11-11 15:13:08,308 INFO L226 Difference]: Without dead ends: 2635 [2020-11-11 15:13:08,308 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:13:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2020-11-11 15:13:08,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2062. [2020-11-11 15:13:08,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:08,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:13:08,359 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:13:08,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:08,359 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:13:08,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:08,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:13:08,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:13:08,363 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:08,363 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:08,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:08,577 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:08,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:08,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1369620450, now seen corresponding path program 52 times [2020-11-11 15:13:08,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:08,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328730535] [2020-11-11 15:13:08,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:08,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328730535] [2020-11-11 15:13:08,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306898331] [2020-11-11 15:13:08,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:08,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:08,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:08,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:08,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:08,949 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:08,995 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:09,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:09,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:13:09,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512628042] [2020-11-11 15:13:09,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:09,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:09,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:09,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:09,007 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:09,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:09,684 INFO L93 Difference]: Finished difference Result 3100 states and 7890 transitions. [2020-11-11 15:13:09,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:13:09,685 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-11-11 15:13:09,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:09,690 INFO L225 Difference]: With dead ends: 3100 [2020-11-11 15:13:09,690 INFO L226 Difference]: Without dead ends: 2830 [2020-11-11 15:13:09,691 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 15:13:09,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2020-11-11 15:13:09,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 2062. [2020-11-11 15:13:09,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:09,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:13:09,731 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:13:09,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:09,731 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:13:09,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:09,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:13:09,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:13:09,734 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:09,734 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:09,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:09,936 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:09,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:09,937 INFO L82 PathProgramCache]: Analyzing trace with hash 802454576, now seen corresponding path program 53 times [2020-11-11 15:13:09,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:09,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641412931] [2020-11-11 15:13:09,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:10,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641412931] [2020-11-11 15:13:10,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419791848] [2020-11-11 15:13:10,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:10,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 15:13:10,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:10,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:13:10,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:10,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:10,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:10,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 15:13:10,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508554258] [2020-11-11 15:13:10,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:13:10,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:10,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:13:10,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:13:10,345 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:10,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:10,939 INFO L93 Difference]: Finished difference Result 3055 states and 7800 transitions. [2020-11-11 15:13:10,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:13:10,939 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-11-11 15:13:10,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:10,945 INFO L225 Difference]: With dead ends: 3055 [2020-11-11 15:13:10,946 INFO L226 Difference]: Without dead ends: 2785 [2020-11-11 15:13:10,946 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 15:13:10,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2020-11-11 15:13:10,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2062. [2020-11-11 15:13:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:10,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:13:10,993 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:13:10,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:10,993 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:13:10,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:10,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:13:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:13:10,996 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:10,996 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:11,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-11-11 15:13:11,208 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:11,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:11,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1631165728, now seen corresponding path program 54 times [2020-11-11 15:13:11,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:11,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477561089] [2020-11-11 15:13:11,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:11,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477561089] [2020-11-11 15:13:11,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413712044] [2020-11-11 15:13:11,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:11,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-11 15:13:11,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:11,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:13:11,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:11,590 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:11,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:11,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:11,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:13:11,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504573271] [2020-11-11 15:13:11,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:11,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:11,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:11,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:11,664 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:12,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:12,453 INFO L93 Difference]: Finished difference Result 3005 states and 7700 transitions. [2020-11-11 15:13:12,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:13:12,454 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-11-11 15:13:12,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:12,458 INFO L225 Difference]: With dead ends: 3005 [2020-11-11 15:13:12,458 INFO L226 Difference]: Without dead ends: 2735 [2020-11-11 15:13:12,458 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 15:13:12,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2020-11-11 15:13:12,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 2062. [2020-11-11 15:13:12,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:12,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:13:12,491 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:13:12,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:12,491 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:13:12,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:12,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:13:12,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:13:12,494 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:12,494 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:12,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:12,695 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:12,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:12,696 INFO L82 PathProgramCache]: Analyzing trace with hash -91372818, now seen corresponding path program 55 times [2020-11-11 15:13:12,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:12,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808206445] [2020-11-11 15:13:12,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:12,949 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:12,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808206445] [2020-11-11 15:13:12,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354446551] [2020-11-11 15:13:12,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:13,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:13:13,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:13,101 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:13,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:13,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 15:13:13,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269299060] [2020-11-11 15:13:13,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:13:13,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:13,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:13:13,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:13:13,116 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:13,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:13,765 INFO L93 Difference]: Finished difference Result 2955 states and 7600 transitions. [2020-11-11 15:13:13,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:13:13,766 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-11-11 15:13:13,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:13,770 INFO L225 Difference]: With dead ends: 2955 [2020-11-11 15:13:13,771 INFO L226 Difference]: Without dead ends: 2685 [2020-11-11 15:13:13,771 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 15:13:13,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2020-11-11 15:13:13,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 2062. [2020-11-11 15:13:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:13:13,807 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:13:13,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:13,807 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:13:13,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:13,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:13:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:13:13,809 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:13,809 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:14,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-11-11 15:13:14,010 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:14,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:14,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1630908450, now seen corresponding path program 56 times [2020-11-11 15:13:14,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:14,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574971997] [2020-11-11 15:13:14,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:14,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574971997] [2020-11-11 15:13:14,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470897933] [2020-11-11 15:13:14,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:14,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:14,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:14,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:13:14,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:14,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:14,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:14,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:14,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:13:14,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701784145] [2020-11-11 15:13:14,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:14,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:14,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:14,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:14,428 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:15,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:15,299 INFO L93 Difference]: Finished difference Result 2905 states and 7500 transitions. [2020-11-11 15:13:15,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:13:15,300 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-11-11 15:13:15,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:15,304 INFO L225 Difference]: With dead ends: 2905 [2020-11-11 15:13:15,304 INFO L226 Difference]: Without dead ends: 2635 [2020-11-11 15:13:15,304 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:13:15,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2020-11-11 15:13:15,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2062. [2020-11-11 15:13:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:15,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:13:15,341 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:13:15,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:15,341 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:13:15,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:15,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:13:15,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:13:15,344 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:15,345 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:15,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:15,560 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:15,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:15,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1307492140, now seen corresponding path program 57 times [2020-11-11 15:13:15,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:15,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075309389] [2020-11-11 15:13:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:15,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075309389] [2020-11-11 15:13:15,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510918408] [2020-11-11 15:13:15,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:15,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-11 15:13:15,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:15,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:13:15,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:15,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:15,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:15,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 15:13:15,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84744032] [2020-11-11 15:13:15,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:13:15,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:15,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:13:15,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:13:15,965 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:16,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:16,727 INFO L93 Difference]: Finished difference Result 2855 states and 7400 transitions. [2020-11-11 15:13:16,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:13:16,728 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-11-11 15:13:16,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:16,733 INFO L225 Difference]: With dead ends: 2855 [2020-11-11 15:13:16,733 INFO L226 Difference]: Without dead ends: 2585 [2020-11-11 15:13:16,733 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:13:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2020-11-11 15:13:16,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2062. [2020-11-11 15:13:16,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7588549247937895) internal successors, (5686), 2061 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:16,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:13:16,775 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:13:16,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:16,775 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:13:16,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:16,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:13:16,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:13:16,778 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:16,778 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:16,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-11-11 15:13:16,979 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:16,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:16,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1155942372, now seen corresponding path program 58 times [2020-11-11 15:13:16,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:16,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336058552] [2020-11-11 15:13:16,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:17,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336058552] [2020-11-11 15:13:17,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339563630] [2020-11-11 15:13:17,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:17,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:17,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:17,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:17,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:17,319 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:17,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:17,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:17,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:13:17,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616527622] [2020-11-11 15:13:17,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:17,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:17,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:17,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:17,379 INFO L87 Difference]: Start difference. First operand 2062 states and 5686 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:18,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:18,302 INFO L93 Difference]: Finished difference Result 2850 states and 7410 transitions. [2020-11-11 15:13:18,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:13:18,303 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-11-11 15:13:18,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:18,306 INFO L225 Difference]: With dead ends: 2850 [2020-11-11 15:13:18,306 INFO L226 Difference]: Without dead ends: 2580 [2020-11-11 15:13:18,306 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=440, Invalid=1282, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:13:18,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2580 states. [2020-11-11 15:13:18,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2580 to 2062. [2020-11-11 15:13:18,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7612809315866085) internal successors, (5691), 2061 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5691 transitions. [2020-11-11 15:13:18,338 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5691 transitions. Word has length 81 [2020-11-11 15:13:18,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:18,338 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5691 transitions. [2020-11-11 15:13:18,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:18,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5691 transitions. [2020-11-11 15:13:18,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:13:18,340 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:18,341 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:18,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:18,542 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:18,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:18,542 INFO L82 PathProgramCache]: Analyzing trace with hash -527150870, now seen corresponding path program 59 times [2020-11-11 15:13:18,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:18,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502359220] [2020-11-11 15:13:18,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:18,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502359220] [2020-11-11 15:13:18,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210434387] [2020-11-11 15:13:18,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:18,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 15:13:18,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:18,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:13:18,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:18,945 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:18,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:18,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 15:13:18,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584775340] [2020-11-11 15:13:18,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:13:18,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:18,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:13:18,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:13:18,961 INFO L87 Difference]: Start difference. First operand 2062 states and 5691 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:19,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:19,765 INFO L93 Difference]: Finished difference Result 3912 states and 10494 transitions. [2020-11-11 15:13:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:13:19,766 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-11-11 15:13:19,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:19,773 INFO L225 Difference]: With dead ends: 3912 [2020-11-11 15:13:19,773 INFO L226 Difference]: Without dead ends: 3642 [2020-11-11 15:13:19,773 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:13:19,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3642 states. [2020-11-11 15:13:19,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3642 to 2187. [2020-11-11 15:13:19,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2186 states have (on average 2.7822506861848124) internal successors, (6082), 2186 states have internal predecessors, (6082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:19,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 6082 transitions. [2020-11-11 15:13:19,821 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 6082 transitions. Word has length 81 [2020-11-11 15:13:19,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:19,821 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 6082 transitions. [2020-11-11 15:13:19,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:19,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 6082 transitions. [2020-11-11 15:13:19,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:13:19,823 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:19,823 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:20,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:20,025 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:20,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:20,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1184057084, now seen corresponding path program 60 times [2020-11-11 15:13:20,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:20,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587832602] [2020-11-11 15:13:20,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:20,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587832602] [2020-11-11 15:13:20,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469888633] [2020-11-11 15:13:20,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:20,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-11 15:13:20,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:20,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:13:20,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:20,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:20,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:20,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:20,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:13:20,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742992052] [2020-11-11 15:13:20,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:20,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:20,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:20,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:20,413 INFO L87 Difference]: Start difference. First operand 2187 states and 6082 transitions. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:21,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:21,573 INFO L93 Difference]: Finished difference Result 3307 states and 8740 transitions. [2020-11-11 15:13:21,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:13:21,574 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-11-11 15:13:21,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:21,578 INFO L225 Difference]: With dead ends: 3307 [2020-11-11 15:13:21,578 INFO L226 Difference]: Without dead ends: 2780 [2020-11-11 15:13:21,579 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=554, Invalid=1608, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:13:21,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2020-11-11 15:13:21,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 1601. [2020-11-11 15:13:21,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 2.69875) internal successors, (4318), 1600 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:21,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 4318 transitions. [2020-11-11 15:13:21,611 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 4318 transitions. Word has length 81 [2020-11-11 15:13:21,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:21,612 INFO L481 AbstractCegarLoop]: Abstraction has 1601 states and 4318 transitions. [2020-11-11 15:13:21,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:21,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 4318 transitions. [2020-11-11 15:13:21,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:21,614 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:21,614 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:21,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-11-11 15:13:21,829 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:21,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:21,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1440295804, now seen corresponding path program 61 times [2020-11-11 15:13:21,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:21,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708215181] [2020-11-11 15:13:21,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:22,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708215181] [2020-11-11 15:13:22,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523895623] [2020-11-11 15:13:22,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:22,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:22,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:22,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:22,310 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:22,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:22,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 21 [2020-11-11 15:13:22,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003693158] [2020-11-11 15:13:22,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:22,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:22,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:22,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:22,325 INFO L87 Difference]: Start difference. First operand 1601 states and 4318 transitions. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:22,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:22,992 INFO L93 Difference]: Finished difference Result 2669 states and 6902 transitions. [2020-11-11 15:13:22,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:13:22,993 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-11 15:13:22,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:22,997 INFO L225 Difference]: With dead ends: 2669 [2020-11-11 15:13:22,997 INFO L226 Difference]: Without dead ends: 2335 [2020-11-11 15:13:22,998 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=386, Invalid=1096, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 15:13:23,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2020-11-11 15:13:23,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 1686. [2020-11-11 15:13:23,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 2.6635014836795254) internal successors, (4488), 1685 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:23,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 4488 transitions. [2020-11-11 15:13:23,032 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 4488 transitions. Word has length 86 [2020-11-11 15:13:23,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:23,032 INFO L481 AbstractCegarLoop]: Abstraction has 1686 states and 4488 transitions. [2020-11-11 15:13:23,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:23,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 4488 transitions. [2020-11-11 15:13:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:23,034 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:23,035 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:23,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:23,244 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:23,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:23,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1109041322, now seen corresponding path program 62 times [2020-11-11 15:13:23,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:23,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738848523] [2020-11-11 15:13:23,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:23,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738848523] [2020-11-11 15:13:23,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366527746] [2020-11-11 15:13:23,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:23,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:23,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:23,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:13:23,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:23,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:23,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:23,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:13:23,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922320780] [2020-11-11 15:13:23,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:23,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:23,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:23,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:23,687 INFO L87 Difference]: Start difference. First operand 1686 states and 4488 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:24,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:24,237 INFO L93 Difference]: Finished difference Result 3020 states and 7370 transitions. [2020-11-11 15:13:24,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:13:24,238 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-11 15:13:24,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:24,242 INFO L225 Difference]: With dead ends: 3020 [2020-11-11 15:13:24,242 INFO L226 Difference]: Without dead ends: 2750 [2020-11-11 15:13:24,242 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:13:24,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2020-11-11 15:13:24,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 1787. [2020-11-11 15:13:24,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.674132138857783) internal successors, (4776), 1786 states have internal predecessors, (4776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:24,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 4776 transitions. [2020-11-11 15:13:24,285 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 4776 transitions. Word has length 86 [2020-11-11 15:13:24,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:24,286 INFO L481 AbstractCegarLoop]: Abstraction has 1787 states and 4776 transitions. [2020-11-11 15:13:24,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:24,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 4776 transitions. [2020-11-11 15:13:24,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:24,289 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:24,289 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:24,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:24,502 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:24,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:24,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1122637414, now seen corresponding path program 63 times [2020-11-11 15:13:24,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:24,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890175093] [2020-11-11 15:13:24,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:24,829 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:24,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890175093] [2020-11-11 15:13:24,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957032047] [2020-11-11 15:13:24,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:24,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-11 15:13:24,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:24,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:13:24,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:24,970 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:25,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:25,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:25,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:13:25,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378647425] [2020-11-11 15:13:25,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:25,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:25,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:25,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:25,040 INFO L87 Difference]: Start difference. First operand 1787 states and 4776 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:25,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:25,719 INFO L93 Difference]: Finished difference Result 2955 states and 7290 transitions. [2020-11-11 15:13:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:13:25,719 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-11 15:13:25,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:25,724 INFO L225 Difference]: With dead ends: 2955 [2020-11-11 15:13:25,724 INFO L226 Difference]: Without dead ends: 2685 [2020-11-11 15:13:25,725 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:13:25,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2020-11-11 15:13:25,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1837. [2020-11-11 15:13:25,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 2.683006535947712) internal successors, (4926), 1836 states have internal predecessors, (4926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:25,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 4926 transitions. [2020-11-11 15:13:25,759 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 4926 transitions. Word has length 86 [2020-11-11 15:13:25,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:25,759 INFO L481 AbstractCegarLoop]: Abstraction has 1837 states and 4926 transitions. [2020-11-11 15:13:25,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:25,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 4926 transitions. [2020-11-11 15:13:25,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:25,761 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:25,761 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:25,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-11-11 15:13:25,962 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:25,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:25,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1560601496, now seen corresponding path program 64 times [2020-11-11 15:13:25,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:25,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192456652] [2020-11-11 15:13:25,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:26,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192456652] [2020-11-11 15:13:26,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670937392] [2020-11-11 15:13:26,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:26,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:26,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:26,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:13:26,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:26,381 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:26,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:26,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:13:26,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883777879] [2020-11-11 15:13:26,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:26,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:26,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:26,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:26,399 INFO L87 Difference]: Start difference. First operand 1837 states and 4926 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:26,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:26,978 INFO L93 Difference]: Finished difference Result 2980 states and 7390 transitions. [2020-11-11 15:13:26,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:13:26,978 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-11 15:13:26,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:26,983 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:13:26,984 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:13:26,984 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:13:26,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:13:27,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 1887. [2020-11-11 15:13:27,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 2.6914103923647934) internal successors, (5076), 1886 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:27,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 5076 transitions. [2020-11-11 15:13:27,031 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 5076 transitions. Word has length 86 [2020-11-11 15:13:27,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:27,031 INFO L481 AbstractCegarLoop]: Abstraction has 1887 states and 5076 transitions. [2020-11-11 15:13:27,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:27,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 5076 transitions. [2020-11-11 15:13:27,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:27,034 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:27,034 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:27,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:27,248 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:27,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:27,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1189073240, now seen corresponding path program 65 times [2020-11-11 15:13:27,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:27,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695887156] [2020-11-11 15:13:27,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:27,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695887156] [2020-11-11 15:13:27,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049244831] [2020-11-11 15:13:27,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:27,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-11 15:13:27,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:27,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:13:27,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:27,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:27,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:27,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:27,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:13:27,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560269888] [2020-11-11 15:13:27,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:27,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:27,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:27,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:27,716 INFO L87 Difference]: Start difference. First operand 1887 states and 5076 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:28,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:28,503 INFO L93 Difference]: Finished difference Result 2980 states and 7440 transitions. [2020-11-11 15:13:28,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:13:28,504 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-11 15:13:28,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:28,507 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:13:28,507 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:13:28,508 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 15:13:28,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:13:28,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 1937. [2020-11-11 15:13:28,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 2.699380165289256) internal successors, (5226), 1936 states have internal predecessors, (5226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:28,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 5226 transitions. [2020-11-11 15:13:28,540 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 5226 transitions. Word has length 86 [2020-11-11 15:13:28,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:28,541 INFO L481 AbstractCegarLoop]: Abstraction has 1937 states and 5226 transitions. [2020-11-11 15:13:28,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:28,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 5226 transitions. [2020-11-11 15:13:28,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:28,543 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:28,544 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:28,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-11-11 15:13:28,744 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:28,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:28,745 INFO L82 PathProgramCache]: Analyzing trace with hash 621907366, now seen corresponding path program 66 times [2020-11-11 15:13:28,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:28,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145764631] [2020-11-11 15:13:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:29,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145764631] [2020-11-11 15:13:29,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471519980] [2020-11-11 15:13:29,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:29,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-11 15:13:29,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:29,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:13:29,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:29,170 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:29,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:29,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:13:29,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500536820] [2020-11-11 15:13:29,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:29,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:29,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:29,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:29,187 INFO L87 Difference]: Start difference. First operand 1937 states and 5226 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:29,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:29,860 INFO L93 Difference]: Finished difference Result 2980 states and 7490 transitions. [2020-11-11 15:13:29,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:13:29,860 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-11 15:13:29,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:29,864 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:13:29,864 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:13:29,864 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:13:29,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:13:29,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 1987. [2020-11-11 15:13:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 2.706948640483384) internal successors, (5376), 1986 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 5376 transitions. [2020-11-11 15:13:29,895 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 5376 transitions. Word has length 86 [2020-11-11 15:13:29,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:29,896 INFO L481 AbstractCegarLoop]: Abstraction has 1987 states and 5376 transitions. [2020-11-11 15:13:29,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:29,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 5376 transitions. [2020-11-11 15:13:29,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:29,897 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:29,898 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:30,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-11-11 15:13:30,099 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:30,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:30,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1450618518, now seen corresponding path program 67 times [2020-11-11 15:13:30,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:30,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885507828] [2020-11-11 15:13:30,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:30,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885507828] [2020-11-11 15:13:30,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254162810] [2020-11-11 15:13:30,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:30,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:13:30,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:30,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:30,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:30,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:30,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:13:30,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605772533] [2020-11-11 15:13:30,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:30,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:30,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:30,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:30,512 INFO L87 Difference]: Start difference. First operand 1987 states and 5376 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:31,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:31,471 INFO L93 Difference]: Finished difference Result 2980 states and 7540 transitions. [2020-11-11 15:13:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:13:31,472 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-11 15:13:31,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:31,478 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:13:31,478 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:13:31,479 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 15:13:31,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:13:31,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 2037. [2020-11-11 15:13:31,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2037 states, 2036 states have (on average 2.7141453831041256) internal successors, (5526), 2036 states have internal predecessors, (5526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:31,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2037 states to 2037 states and 5526 transitions. [2020-11-11 15:13:31,520 INFO L78 Accepts]: Start accepts. Automaton has 2037 states and 5526 transitions. Word has length 86 [2020-11-11 15:13:31,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:31,520 INFO L481 AbstractCegarLoop]: Abstraction has 2037 states and 5526 transitions. [2020-11-11 15:13:31,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:31,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2037 states and 5526 transitions. [2020-11-11 15:13:31,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:31,523 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:31,523 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:31,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-11-11 15:13:31,725 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:31,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:31,725 INFO L82 PathProgramCache]: Analyzing trace with hash -271920028, now seen corresponding path program 68 times [2020-11-11 15:13:31,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:31,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333872171] [2020-11-11 15:13:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:32,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333872171] [2020-11-11 15:13:32,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192337671] [2020-11-11 15:13:32,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:32,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:32,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:32,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:13:32,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:32,185 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:32,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:32,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:13:32,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402559136] [2020-11-11 15:13:32,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:32,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:32,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:32,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:32,205 INFO L87 Difference]: Start difference. First operand 2037 states and 5526 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:33,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:33,044 INFO L93 Difference]: Finished difference Result 2980 states and 7590 transitions. [2020-11-11 15:13:33,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:13:33,045 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-11 15:13:33,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:33,049 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:13:33,049 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:13:33,050 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=366, Invalid=1116, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 15:13:33,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:13:33,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 2087. [2020-11-11 15:13:33,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 2.7209971236816872) internal successors, (5676), 2086 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:33,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 5676 transitions. [2020-11-11 15:13:33,095 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 5676 transitions. Word has length 86 [2020-11-11 15:13:33,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:33,096 INFO L481 AbstractCegarLoop]: Abstraction has 2087 states and 5676 transitions. [2020-11-11 15:13:33,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:33,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 5676 transitions. [2020-11-11 15:13:33,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:33,099 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:33,099 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:33,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:33,300 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:33,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:33,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1811455660, now seen corresponding path program 69 times [2020-11-11 15:13:33,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:33,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669751478] [2020-11-11 15:13:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:33,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669751478] [2020-11-11 15:13:33,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297242447] [2020-11-11 15:13:33,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:33,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-11 15:13:33,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:33,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:13:33,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:33,708 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:33,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:33,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:33,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:13:33,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140361004] [2020-11-11 15:13:33,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:33,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:33,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:33,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:33,769 INFO L87 Difference]: Start difference. First operand 2087 states and 5676 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:34,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:34,894 INFO L93 Difference]: Finished difference Result 2980 states and 7640 transitions. [2020-11-11 15:13:34,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:13:34,895 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-11 15:13:34,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:34,900 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:13:34,900 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:13:34,901 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=443, Invalid=1363, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 15:13:34,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:13:34,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 2137. [2020-11-11 15:13:34,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 2.7275280898876404) internal successors, (5826), 2136 states have internal predecessors, (5826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:34,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 5826 transitions. [2020-11-11 15:13:34,955 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 5826 transitions. Word has length 86 [2020-11-11 15:13:34,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:34,955 INFO L481 AbstractCegarLoop]: Abstraction has 2137 states and 5826 transitions. [2020-11-11 15:13:34,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:34,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 5826 transitions. [2020-11-11 15:13:34,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:34,958 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:34,959 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:35,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:35,159 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:35,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:35,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1126944930, now seen corresponding path program 70 times [2020-11-11 15:13:35,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:35,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454631922] [2020-11-11 15:13:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:35,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454631922] [2020-11-11 15:13:35,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886140930] [2020-11-11 15:13:35,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:35,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:35,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:35,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:13:35,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:35,553 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:35,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:35,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:13:35,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446434799] [2020-11-11 15:13:35,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:35,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:35,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:35,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:35,567 INFO L87 Difference]: Start difference. First operand 2137 states and 5826 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:36,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:36,384 INFO L93 Difference]: Finished difference Result 3010 states and 7765 transitions. [2020-11-11 15:13:36,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:13:36,385 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-11 15:13:36,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:36,390 INFO L225 Difference]: With dead ends: 3010 [2020-11-11 15:13:36,390 INFO L226 Difference]: Without dead ends: 2740 [2020-11-11 15:13:36,390 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=426, Invalid=1214, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 15:13:36,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2020-11-11 15:13:36,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 2187. [2020-11-11 15:13:36,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2186 states have (on average 2.738334858188472) internal successors, (5986), 2186 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 5986 transitions. [2020-11-11 15:13:36,427 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 5986 transitions. Word has length 86 [2020-11-11 15:13:36,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:36,428 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 5986 transitions. [2020-11-11 15:13:36,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:36,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 5986 transitions. [2020-11-11 15:13:36,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:36,430 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:36,430 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:36,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:36,631 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:36,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:36,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1336489582, now seen corresponding path program 71 times [2020-11-11 15:13:36,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:36,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116338240] [2020-11-11 15:13:36,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:36,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116338240] [2020-11-11 15:13:36,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930177224] [2020-11-11 15:13:36,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:36,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-11 15:13:36,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:36,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:13:36,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:36,999 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:37,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:37,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:37,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:13:37,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236776569] [2020-11-11 15:13:37,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:37,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:37,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:37,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:37,053 INFO L87 Difference]: Start difference. First operand 2187 states and 5986 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:38,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:38,291 INFO L93 Difference]: Finished difference Result 3469 states and 9034 transitions. [2020-11-11 15:13:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:13:38,292 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-11 15:13:38,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:38,296 INFO L225 Difference]: With dead ends: 3469 [2020-11-11 15:13:38,296 INFO L226 Difference]: Without dead ends: 2900 [2020-11-11 15:13:38,297 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=534, Invalid=1628, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:13:38,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2020-11-11 15:13:38,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 2237. [2020-11-11 15:13:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 2.7464221824686943) internal successors, (6141), 2236 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:38,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 6141 transitions. [2020-11-11 15:13:38,332 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 6141 transitions. Word has length 86 [2020-11-11 15:13:38,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:38,332 INFO L481 AbstractCegarLoop]: Abstraction has 2237 states and 6141 transitions. [2020-11-11 15:13:38,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:38,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 6141 transitions. [2020-11-11 15:13:38,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:38,335 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:38,335 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:38,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:38,537 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:38,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:38,538 INFO L82 PathProgramCache]: Analyzing trace with hash -707698080, now seen corresponding path program 72 times [2020-11-11 15:13:38,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:38,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145341913] [2020-11-11 15:13:38,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:38,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145341913] [2020-11-11 15:13:38,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112516062] [2020-11-11 15:13:38,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:38,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-11 15:13:38,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:38,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:13:38,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:38,936 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:38,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:38,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:13:38,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647274407] [2020-11-11 15:13:38,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:13:38,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:38,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:13:38,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:13:38,948 INFO L87 Difference]: Start difference. First operand 2237 states and 6141 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:39,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:39,850 INFO L93 Difference]: Finished difference Result 4112 states and 10994 transitions. [2020-11-11 15:13:39,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:13:39,851 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-11 15:13:39,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:39,856 INFO L225 Difference]: With dead ends: 4112 [2020-11-11 15:13:39,857 INFO L226 Difference]: Without dead ends: 3842 [2020-11-11 15:13:39,857 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=503, Invalid=1303, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 15:13:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3842 states. [2020-11-11 15:13:39,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3842 to 2362. [2020-11-11 15:13:39,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2361 states have (on average 2.7666243117323166) internal successors, (6532), 2361 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 6532 transitions. [2020-11-11 15:13:39,903 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 6532 transitions. Word has length 86 [2020-11-11 15:13:39,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:39,903 INFO L481 AbstractCegarLoop]: Abstraction has 2362 states and 6532 transitions. [2020-11-11 15:13:39,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:39,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 6532 transitions. [2020-11-11 15:13:39,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:13:39,906 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:39,906 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:40,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-11-11 15:13:40,107 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:40,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:40,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1003509874, now seen corresponding path program 73 times [2020-11-11 15:13:40,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:40,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092776399] [2020-11-11 15:13:40,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:40,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092776399] [2020-11-11 15:13:40,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309387606] [2020-11-11 15:13:40,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:40,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:13:40,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:40,473 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:40,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:40,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:40,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:13:40,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845731728] [2020-11-11 15:13:40,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:40,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:40,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:40,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:40,517 INFO L87 Difference]: Start difference. First operand 2362 states and 6532 transitions. Second operand has 19 states, 19 states have (on average 4.684210526315789) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:41,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:41,841 INFO L93 Difference]: Finished difference Result 3487 states and 9150 transitions. [2020-11-11 15:13:41,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:13:41,842 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.684210526315789) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-11 15:13:41,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:41,846 INFO L225 Difference]: With dead ends: 3487 [2020-11-11 15:13:41,846 INFO L226 Difference]: Without dead ends: 2960 [2020-11-11 15:13:41,847 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=633, Invalid=1817, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:13:41,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2020-11-11 15:13:41,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 1812. [2020-11-11 15:13:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1811 states have (on average 2.6924351187189397) internal successors, (4876), 1811 states have internal predecessors, (4876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:41,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 4876 transitions. [2020-11-11 15:13:41,882 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 4876 transitions. Word has length 86 [2020-11-11 15:13:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:41,882 INFO L481 AbstractCegarLoop]: Abstraction has 1812 states and 4876 transitions. [2020-11-11 15:13:41,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.684210526315789) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 4876 transitions. [2020-11-11 15:13:41,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:41,885 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:41,885 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:42,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:42,086 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:42,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:42,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1275110147, now seen corresponding path program 74 times [2020-11-11 15:13:42,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:42,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695135841] [2020-11-11 15:13:42,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:42,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695135841] [2020-11-11 15:13:42,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774526279] [2020-11-11 15:13:42,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:42,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:42,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:42,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:42,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:42,548 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:42,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:42,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:13:42,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779307067] [2020-11-11 15:13:42,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:42,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:42,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:42,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:42,567 INFO L87 Difference]: Start difference. First operand 1812 states and 4876 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:43,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:43,193 INFO L93 Difference]: Finished difference Result 2805 states and 7040 transitions. [2020-11-11 15:13:43,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:13:43,194 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2020-11-11 15:13:43,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:43,199 INFO L225 Difference]: With dead ends: 2805 [2020-11-11 15:13:43,199 INFO L226 Difference]: Without dead ends: 2535 [2020-11-11 15:13:43,200 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=334, Invalid=998, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:13:43,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2020-11-11 15:13:43,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 1862. [2020-11-11 15:13:43,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1861 states have (on average 2.7006985491671145) internal successors, (5026), 1861 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:43,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 5026 transitions. [2020-11-11 15:13:43,238 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 5026 transitions. Word has length 91 [2020-11-11 15:13:43,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:43,239 INFO L481 AbstractCegarLoop]: Abstraction has 1862 states and 5026 transitions. [2020-11-11 15:13:43,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:43,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 5026 transitions. [2020-11-11 15:13:43,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:43,242 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:43,242 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:43,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:43,457 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:43,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:43,457 INFO L82 PathProgramCache]: Analyzing trace with hash -956568589, now seen corresponding path program 75 times [2020-11-11 15:13:43,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:43,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101860824] [2020-11-11 15:13:43,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:43,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101860824] [2020-11-11 15:13:43,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067162718] [2020-11-11 15:13:43,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:43,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-11 15:13:43,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:43,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:43,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:44,000 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:44,051 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:44,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:44,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:13:44,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747007667] [2020-11-11 15:13:44,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:44,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:44,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:44,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:44,073 INFO L87 Difference]: Start difference. First operand 1862 states and 5026 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:44,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:44,810 INFO L93 Difference]: Finished difference Result 3100 states and 7680 transitions. [2020-11-11 15:13:44,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:13:44,811 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2020-11-11 15:13:44,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:44,815 INFO L225 Difference]: With dead ends: 3100 [2020-11-11 15:13:44,816 INFO L226 Difference]: Without dead ends: 2830 [2020-11-11 15:13:44,816 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:13:44,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2020-11-11 15:13:44,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 1912. [2020-11-11 15:13:44,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 2.7085295656724226) internal successors, (5176), 1911 states have internal predecessors, (5176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:44,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 5176 transitions. [2020-11-11 15:13:44,849 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 5176 transitions. Word has length 91 [2020-11-11 15:13:44,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:44,849 INFO L481 AbstractCegarLoop]: Abstraction has 1912 states and 5176 transitions. [2020-11-11 15:13:44,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:44,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 5176 transitions. [2020-11-11 15:13:44,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:44,851 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:44,852 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:45,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:45,053 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:45,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:45,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1394532671, now seen corresponding path program 76 times [2020-11-11 15:13:45,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:45,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398512899] [2020-11-11 15:13:45,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:45,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398512899] [2020-11-11 15:13:45,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718777905] [2020-11-11 15:13:45,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:45,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:45,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:45,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:45,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:45,492 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:45,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:45,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:13:45,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850009975] [2020-11-11 15:13:45,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:45,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:45,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:45,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:45,511 INFO L87 Difference]: Start difference. First operand 1912 states and 5176 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:46,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:46,227 INFO L93 Difference]: Finished difference Result 3105 states and 7740 transitions. [2020-11-11 15:13:46,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:13:46,227 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2020-11-11 15:13:46,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:46,231 INFO L225 Difference]: With dead ends: 3105 [2020-11-11 15:13:46,232 INFO L226 Difference]: Without dead ends: 2835 [2020-11-11 15:13:46,232 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=384, Invalid=1176, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:13:46,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2020-11-11 15:13:46,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 1962. [2020-11-11 15:13:46,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 2.715961244263131) internal successors, (5326), 1961 states have internal predecessors, (5326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:46,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 5326 transitions. [2020-11-11 15:13:46,265 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 5326 transitions. Word has length 91 [2020-11-11 15:13:46,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:46,265 INFO L481 AbstractCegarLoop]: Abstraction has 1962 states and 5326 transitions. [2020-11-11 15:13:46,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:46,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 5326 transitions. [2020-11-11 15:13:46,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:46,270 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:46,270 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:46,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:46,479 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:46,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:46,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1355142065, now seen corresponding path program 77 times [2020-11-11 15:13:46,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:46,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374209291] [2020-11-11 15:13:46,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:46,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374209291] [2020-11-11 15:13:46,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239733092] [2020-11-11 15:13:46,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:46,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-11 15:13:46,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:46,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:46,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:46,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:46,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:46,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:46,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:13:46,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680800175] [2020-11-11 15:13:46,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:46,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:46,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:46,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:46,954 INFO L87 Difference]: Start difference. First operand 1962 states and 5326 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:47,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:47,879 INFO L93 Difference]: Finished difference Result 3105 states and 7790 transitions. [2020-11-11 15:13:47,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:13:47,880 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2020-11-11 15:13:47,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:47,884 INFO L225 Difference]: With dead ends: 3105 [2020-11-11 15:13:47,884 INFO L226 Difference]: Without dead ends: 2835 [2020-11-11 15:13:47,885 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=407, Invalid=1315, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:13:47,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2020-11-11 15:13:47,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2012. [2020-11-11 15:13:47,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 2011 states have (on average 2.7230233714569865) internal successors, (5476), 2011 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:47,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 5476 transitions. [2020-11-11 15:13:47,921 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 5476 transitions. Word has length 91 [2020-11-11 15:13:47,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:47,921 INFO L481 AbstractCegarLoop]: Abstraction has 2012 states and 5476 transitions. [2020-11-11 15:13:47,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:47,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 5476 transitions. [2020-11-11 15:13:47,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:47,923 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:47,923 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:48,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-11-11 15:13:48,124 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:48,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:48,125 INFO L82 PathProgramCache]: Analyzing trace with hash 787976191, now seen corresponding path program 78 times [2020-11-11 15:13:48,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:48,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091226151] [2020-11-11 15:13:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:48,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091226151] [2020-11-11 15:13:48,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917311254] [2020-11-11 15:13:48,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:48,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-11 15:13:48,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:48,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:48,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:48,553 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:48,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:48,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:13:48,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917076027] [2020-11-11 15:13:48,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:48,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:48,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:48,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:48,573 INFO L87 Difference]: Start difference. First operand 2012 states and 5476 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:49,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:49,376 INFO L93 Difference]: Finished difference Result 3105 states and 7840 transitions. [2020-11-11 15:13:49,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:13:49,377 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2020-11-11 15:13:49,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:49,382 INFO L225 Difference]: With dead ends: 3105 [2020-11-11 15:13:49,382 INFO L226 Difference]: Without dead ends: 2835 [2020-11-11 15:13:49,382 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=425, Invalid=1297, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:13:49,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2020-11-11 15:13:49,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2062. [2020-11-11 15:13:49,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.7297428432799613) internal successors, (5626), 2061 states have internal predecessors, (5626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:49,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5626 transitions. [2020-11-11 15:13:49,425 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5626 transitions. Word has length 91 [2020-11-11 15:13:49,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:49,425 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5626 transitions. [2020-11-11 15:13:49,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:49,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5626 transitions. [2020-11-11 15:13:49,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:49,428 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:49,428 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:49,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-11-11 15:13:49,629 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:49,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:49,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1616687343, now seen corresponding path program 79 times [2020-11-11 15:13:49,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:49,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113335217] [2020-11-11 15:13:49,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:49,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113335217] [2020-11-11 15:13:49,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966376913] [2020-11-11 15:13:49,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:50,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:50,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:50,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:50,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:50,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:50,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:13:50,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579522664] [2020-11-11 15:13:50,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:50,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:50,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:50,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:50,199 INFO L87 Difference]: Start difference. First operand 2062 states and 5626 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:51,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:51,187 INFO L93 Difference]: Finished difference Result 3105 states and 7890 transitions. [2020-11-11 15:13:51,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:13:51,188 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2020-11-11 15:13:51,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:51,192 INFO L225 Difference]: With dead ends: 3105 [2020-11-11 15:13:51,192 INFO L226 Difference]: Without dead ends: 2835 [2020-11-11 15:13:51,193 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=450, Invalid=1442, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:13:51,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2020-11-11 15:13:51,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2112. [2020-11-11 15:13:51,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 2.7361440075793464) internal successors, (5776), 2111 states have internal predecessors, (5776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:51,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 5776 transitions. [2020-11-11 15:13:51,229 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 5776 transitions. Word has length 91 [2020-11-11 15:13:51,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:51,229 INFO L481 AbstractCegarLoop]: Abstraction has 2112 states and 5776 transitions. [2020-11-11 15:13:51,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:51,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 5776 transitions. [2020-11-11 15:13:51,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:51,232 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:51,232 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:51,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:51,447 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:51,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:51,447 INFO L82 PathProgramCache]: Analyzing trace with hash -105851203, now seen corresponding path program 80 times [2020-11-11 15:13:51,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:51,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669729932] [2020-11-11 15:13:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:51,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669729932] [2020-11-11 15:13:51,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680565427] [2020-11-11 15:13:51,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:51,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:51,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:51,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:51,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:51,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:51,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:51,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:13:51,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465761184] [2020-11-11 15:13:51,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:51,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:51,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:51,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:51,856 INFO L87 Difference]: Start difference. First operand 2112 states and 5776 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:52,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:52,731 INFO L93 Difference]: Finished difference Result 3105 states and 7940 transitions. [2020-11-11 15:13:52,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:13:52,732 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2020-11-11 15:13:52,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:52,737 INFO L225 Difference]: With dead ends: 3105 [2020-11-11 15:13:52,737 INFO L226 Difference]: Without dead ends: 2835 [2020-11-11 15:13:52,738 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=482, Invalid=1410, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:13:52,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2020-11-11 15:13:52,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2162. [2020-11-11 15:13:52,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2161 states have (on average 2.742248958815363) internal successors, (5926), 2161 states have internal predecessors, (5926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 5926 transitions. [2020-11-11 15:13:52,777 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 5926 transitions. Word has length 91 [2020-11-11 15:13:52,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:52,777 INFO L481 AbstractCegarLoop]: Abstraction has 2162 states and 5926 transitions. [2020-11-11 15:13:52,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:52,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 5926 transitions. [2020-11-11 15:13:52,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:52,779 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:52,780 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:52,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:52,980 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:52,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:52,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1645386835, now seen corresponding path program 81 times [2020-11-11 15:13:52,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:52,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455261973] [2020-11-11 15:13:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:53,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455261973] [2020-11-11 15:13:53,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027422588] [2020-11-11 15:13:53,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:53,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-11 15:13:53,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:53,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:53,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:53,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:53,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:53,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:53,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:13:53,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755436483] [2020-11-11 15:13:53,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:53,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:53,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:53,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:53,474 INFO L87 Difference]: Start difference. First operand 2162 states and 5926 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:54,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:54,551 INFO L93 Difference]: Finished difference Result 3105 states and 7990 transitions. [2020-11-11 15:13:54,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:13:54,552 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2020-11-11 15:13:54,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:54,555 INFO L225 Difference]: With dead ends: 3105 [2020-11-11 15:13:54,555 INFO L226 Difference]: Without dead ends: 2835 [2020-11-11 15:13:54,556 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=509, Invalid=1561, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:13:54,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2020-11-11 15:13:54,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2212. [2020-11-11 15:13:54,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2211 states have (on average 2.748077792853912) internal successors, (6076), 2211 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:54,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 6076 transitions. [2020-11-11 15:13:54,593 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 6076 transitions. Word has length 91 [2020-11-11 15:13:54,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:54,593 INFO L481 AbstractCegarLoop]: Abstraction has 2212 states and 6076 transitions. [2020-11-11 15:13:54,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:54,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 6076 transitions. [2020-11-11 15:13:54,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:54,598 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:54,598 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:54,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:54,799 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:54,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:54,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1293013755, now seen corresponding path program 82 times [2020-11-11 15:13:54,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:54,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933000985] [2020-11-11 15:13:54,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:55,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933000985] [2020-11-11 15:13:55,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304118134] [2020-11-11 15:13:55,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:55,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:55,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:55,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:55,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:55,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:55,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:55,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:13:55,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142440383] [2020-11-11 15:13:55,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:55,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:55,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:55,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:55,255 INFO L87 Difference]: Start difference. First operand 2212 states and 6076 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:56,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:56,228 INFO L93 Difference]: Finished difference Result 3135 states and 8115 transitions. [2020-11-11 15:13:56,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:13:56,229 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2020-11-11 15:13:56,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:56,233 INFO L225 Difference]: With dead ends: 3135 [2020-11-11 15:13:56,233 INFO L226 Difference]: Without dead ends: 2865 [2020-11-11 15:13:56,233 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=555, Invalid=1515, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:13:56,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2020-11-11 15:13:56,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2262. [2020-11-11 15:13:56,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 2261 states have (on average 2.7580716497125164) internal successors, (6236), 2261 states have internal predecessors, (6236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:56,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 6236 transitions. [2020-11-11 15:13:56,271 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 6236 transitions. Word has length 91 [2020-11-11 15:13:56,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:56,272 INFO L481 AbstractCegarLoop]: Abstraction has 2262 states and 6236 transitions. [2020-11-11 15:13:56,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:56,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 6236 transitions. [2020-11-11 15:13:56,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:56,274 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:56,274 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:56,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:56,475 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:56,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:56,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1170420757, now seen corresponding path program 83 times [2020-11-11 15:13:56,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:56,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767292275] [2020-11-11 15:13:56,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:56,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767292275] [2020-11-11 15:13:56,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105993922] [2020-11-11 15:13:56,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:56,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-11 15:13:56,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:56,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:56,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:56,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:56,920 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:56,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:56,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:13:56,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718699394] [2020-11-11 15:13:56,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:56,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:56,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:56,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:56,931 INFO L87 Difference]: Start difference. First operand 2262 states and 6236 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:58,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:58,340 INFO L93 Difference]: Finished difference Result 3594 states and 9384 transitions. [2020-11-11 15:13:58,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:13:58,341 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2020-11-11 15:13:58,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:58,345 INFO L225 Difference]: With dead ends: 3594 [2020-11-11 15:13:58,345 INFO L226 Difference]: Without dead ends: 3025 [2020-11-11 15:13:58,345 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=607, Invalid=1843, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:13:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2020-11-11 15:13:58,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 2312. [2020-11-11 15:13:58,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2311 states have (on average 2.76546949372566) internal successors, (6391), 2311 states have internal predecessors, (6391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:58,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 6391 transitions. [2020-11-11 15:13:58,381 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 6391 transitions. Word has length 91 [2020-11-11 15:13:58,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:58,381 INFO L481 AbstractCegarLoop]: Abstraction has 2312 states and 6391 transitions. [2020-11-11 15:13:58,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:58,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 6391 transitions. [2020-11-11 15:13:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:13:58,383 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:58,384 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:13:58,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:58,584 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:58,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:58,585 INFO L82 PathProgramCache]: Analyzing trace with hash -541629255, now seen corresponding path program 84 times [2020-11-11 15:13:58,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:58,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333537303] [2020-11-11 15:13:58,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:58,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333537303] [2020-11-11 15:13:58,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849777515] [2020-11-11 15:13:58,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:58,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-11 15:13:58,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:58,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:13:58,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:58,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:13:59,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:59,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:13:59,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492706422] [2020-11-11 15:13:59,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:59,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:59,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:59,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:59,045 INFO L87 Difference]: Start difference. First operand 2312 states and 6391 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:00,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:00,033 INFO L93 Difference]: Finished difference Result 4212 states and 11294 transitions. [2020-11-11 15:14:00,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:14:00,034 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2020-11-11 15:14:00,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:00,040 INFO L225 Difference]: With dead ends: 4212 [2020-11-11 15:14:00,040 INFO L226 Difference]: Without dead ends: 3942 [2020-11-11 15:14:00,041 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=645, Invalid=1611, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:14:00,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3942 states. [2020-11-11 15:14:00,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3942 to 2437. [2020-11-11 15:14:00,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2437 states, 2436 states have (on average 2.784072249589491) internal successors, (6782), 2436 states have internal predecessors, (6782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:00,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 6782 transitions. [2020-11-11 15:14:00,088 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 6782 transitions. Word has length 91 [2020-11-11 15:14:00,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:00,088 INFO L481 AbstractCegarLoop]: Abstraction has 2437 states and 6782 transitions. [2020-11-11 15:14:00,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:00,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 6782 transitions. [2020-11-11 15:14:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:14:00,092 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:00,092 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:00,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:00,293 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:00,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:00,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1169578699, now seen corresponding path program 85 times [2020-11-11 15:14:00,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:00,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343755865] [2020-11-11 15:14:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:00,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343755865] [2020-11-11 15:14:00,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363147519] [2020-11-11 15:14:00,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:00,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:14:00,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:00,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:00,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:00,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:00,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:14:00,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122464120] [2020-11-11 15:14:00,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:14:00,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:00,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:14:00,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:14:00,697 INFO L87 Difference]: Start difference. First operand 2437 states and 6782 transitions. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:01,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:01,935 INFO L93 Difference]: Finished difference Result 3226 states and 8600 transitions. [2020-11-11 15:14:01,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:14:01,936 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2020-11-11 15:14:01,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:01,942 INFO L225 Difference]: With dead ends: 3226 [2020-11-11 15:14:01,943 INFO L226 Difference]: Without dead ends: 2815 [2020-11-11 15:14:01,943 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:14:01,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2815 states. [2020-11-11 15:14:02,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2815 to 2387. [2020-11-11 15:14:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 2.7812238055322718) internal successors, (6636), 2386 states have internal predecessors, (6636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:02,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 6636 transitions. [2020-11-11 15:14:02,013 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 6636 transitions. Word has length 91 [2020-11-11 15:14:02,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:02,013 INFO L481 AbstractCegarLoop]: Abstraction has 2387 states and 6636 transitions. [2020-11-11 15:14:02,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:02,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 6636 transitions. [2020-11-11 15:14:02,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:02,016 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:02,016 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:02,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:02,217 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:02,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:02,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1476649203, now seen corresponding path program 86 times [2020-11-11 15:14:02,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:02,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55968285] [2020-11-11 15:14:02,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:02,623 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:02,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55968285] [2020-11-11 15:14:02,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069478194] [2020-11-11 15:14:02,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:02,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:02,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:02,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:02,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:02,765 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:02,777 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:02,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:02,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:14:02,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344047641] [2020-11-11 15:14:02,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:02,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:02,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:02,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:02,809 INFO L87 Difference]: Start difference. First operand 2387 states and 6636 transitions. Second operand has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:03,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:03,585 INFO L93 Difference]: Finished difference Result 3505 states and 9320 transitions. [2020-11-11 15:14:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:14:03,586 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-11 15:14:03,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:03,592 INFO L225 Difference]: With dead ends: 3505 [2020-11-11 15:14:03,592 INFO L226 Difference]: Without dead ends: 3171 [2020-11-11 15:14:03,592 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:14:03,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2020-11-11 15:14:03,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 2472. [2020-11-11 15:14:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.754350465398624) internal successors, (6806), 2471 states have internal predecessors, (6806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 6806 transitions. [2020-11-11 15:14:03,634 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 6806 transitions. Word has length 96 [2020-11-11 15:14:03,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:03,634 INFO L481 AbstractCegarLoop]: Abstraction has 2472 states and 6806 transitions. [2020-11-11 15:14:03,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:03,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 6806 transitions. [2020-11-11 15:14:03,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:03,637 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:03,637 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:03,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-11-11 15:14:03,837 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:03,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:03,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1036481211, now seen corresponding path program 87 times [2020-11-11 15:14:03,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:03,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703759938] [2020-11-11 15:14:03,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:04,186 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:04,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703759938] [2020-11-11 15:14:04,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072248136] [2020-11-11 15:14:04,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:04,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 15:14:04,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:04,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:14:04,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:04,311 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:04,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:04,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:14:04,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224830253] [2020-11-11 15:14:04,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:14:04,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:04,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:14:04,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:14:04,336 INFO L87 Difference]: Start difference. First operand 2472 states and 6806 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:04,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:04,943 INFO L93 Difference]: Finished difference Result 3870 states and 9730 transitions. [2020-11-11 15:14:04,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:14:04,944 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-11 15:14:04,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:04,950 INFO L225 Difference]: With dead ends: 3870 [2020-11-11 15:14:04,950 INFO L226 Difference]: Without dead ends: 3600 [2020-11-11 15:14:04,950 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 15:14:04,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2020-11-11 15:14:04,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 2487. [2020-11-11 15:14:04,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:04,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:04,990 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:04,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:04,990 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:04,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:04,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:04,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:04,993 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:04,993 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:05,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:05,194 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:05,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:05,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1672499115, now seen corresponding path program 88 times [2020-11-11 15:14:05,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:05,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941925909] [2020-11-11 15:14:05,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:05,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:05,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941925909] [2020-11-11 15:14:05,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335144645] [2020-11-11 15:14:05,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:05,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:14:05,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:05,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:14:05,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:05,702 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:05,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:05,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:05,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:14:05,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269243819] [2020-11-11 15:14:05,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:14:05,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:05,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:14:05,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:14:05,742 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:06,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:06,517 INFO L93 Difference]: Finished difference Result 3755 states and 9500 transitions. [2020-11-11 15:14:06,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:14:06,518 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-11 15:14:06,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:06,525 INFO L225 Difference]: With dead ends: 3755 [2020-11-11 15:14:06,526 INFO L226 Difference]: Without dead ends: 3485 [2020-11-11 15:14:06,526 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:14:06,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2020-11-11 15:14:06,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 2487. [2020-11-11 15:14:06,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:06,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:06,572 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:06,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:06,572 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:06,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:06,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:06,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:06,575 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:06,575 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:06,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-11-11 15:14:06,776 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:06,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:06,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1783027961, now seen corresponding path program 89 times [2020-11-11 15:14:06,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:06,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498383693] [2020-11-11 15:14:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:07,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498383693] [2020-11-11 15:14:07,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663655731] [2020-11-11 15:14:07,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:07,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 15:14:07,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:07,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:14:07,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:07,222 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:07,238 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:07,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:07,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:14:07,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504715166] [2020-11-11 15:14:07,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:14:07,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:07,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:14:07,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:14:07,241 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:07,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:07,954 INFO L93 Difference]: Finished difference Result 3730 states and 9450 transitions. [2020-11-11 15:14:07,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:14:07,955 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-11 15:14:07,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:07,960 INFO L225 Difference]: With dead ends: 3730 [2020-11-11 15:14:07,960 INFO L226 Difference]: Without dead ends: 3460 [2020-11-11 15:14:07,961 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 15:14:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2020-11-11 15:14:07,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 2487. [2020-11-11 15:14:07,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:07,999 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:07,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:07,999 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:07,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:08,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:08,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:08,002 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:08,003 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:08,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:08,203 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:08,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:08,204 INFO L82 PathProgramCache]: Analyzing trace with hash -448650775, now seen corresponding path program 90 times [2020-11-11 15:14:08,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:08,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941053635] [2020-11-11 15:14:08,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:08,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941053635] [2020-11-11 15:14:08,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796618705] [2020-11-11 15:14:08,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:08,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 15:14:08,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:08,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:14:08,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:08,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:08,705 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:08,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:08,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:14:08,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52462483] [2020-11-11 15:14:08,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:14:08,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:08,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:14:08,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:14:08,721 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:09,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:09,639 INFO L93 Difference]: Finished difference Result 3680 states and 9350 transitions. [2020-11-11 15:14:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:14:09,640 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-11 15:14:09,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:09,645 INFO L225 Difference]: With dead ends: 3680 [2020-11-11 15:14:09,645 INFO L226 Difference]: Without dead ends: 3410 [2020-11-11 15:14:09,645 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:14:09,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2020-11-11 15:14:09,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 2487. [2020-11-11 15:14:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:09,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:09,684 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:09,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:09,684 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:09,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:09,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:09,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:09,686 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:09,686 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:09,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-11-11 15:14:09,897 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:09,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:09,898 INFO L82 PathProgramCache]: Analyzing trace with hash -886614857, now seen corresponding path program 91 times [2020-11-11 15:14:09,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:09,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414257743] [2020-11-11 15:14:09,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:10,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414257743] [2020-11-11 15:14:10,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678795172] [2020-11-11 15:14:10,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:10,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:14:10,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:10,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:10,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:10,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:14:10,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878625517] [2020-11-11 15:14:10,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:14:10,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:10,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:14:10,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:14:10,355 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:11,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:11,186 INFO L93 Difference]: Finished difference Result 3630 states and 9250 transitions. [2020-11-11 15:14:11,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:14:11,187 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-11 15:14:11,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:11,191 INFO L225 Difference]: With dead ends: 3630 [2020-11-11 15:14:11,192 INFO L226 Difference]: Without dead ends: 3360 [2020-11-11 15:14:11,192 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:14:11,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2020-11-11 15:14:11,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2487. [2020-11-11 15:14:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:11,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:11,231 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:11,231 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:11,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:11,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:11,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:11,233 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:11,234 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:11,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-11-11 15:14:11,436 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:11,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:11,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1863059879, now seen corresponding path program 92 times [2020-11-11 15:14:11,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:11,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870059002] [2020-11-11 15:14:11,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:11,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870059002] [2020-11-11 15:14:11,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356941505] [2020-11-11 15:14:11,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:11,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:11,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:11,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:14:11,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:11,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:11,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:11,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:11,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:14:11,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826561356] [2020-11-11 15:14:11,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:14:11,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:11,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:14:11,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:14:11,917 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:12,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:12,951 INFO L93 Difference]: Finished difference Result 3580 states and 9150 transitions. [2020-11-11 15:14:12,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:14:12,951 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-11 15:14:12,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:12,957 INFO L225 Difference]: With dead ends: 3580 [2020-11-11 15:14:12,957 INFO L226 Difference]: Without dead ends: 3310 [2020-11-11 15:14:12,957 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:14:12,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2020-11-11 15:14:13,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 2487. [2020-11-11 15:14:13,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:13,015 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:13,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:13,015 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:13,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:13,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:13,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:13,018 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:13,018 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:13,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-11-11 15:14:13,219 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:13,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:13,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1295894005, now seen corresponding path program 93 times [2020-11-11 15:14:13,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:13,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257888023] [2020-11-11 15:14:13,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:13,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257888023] [2020-11-11 15:14:13,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925264437] [2020-11-11 15:14:13,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:13,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 15:14:13,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:13,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:14:13,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:13,648 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:13,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:13,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:14:13,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380011803] [2020-11-11 15:14:13,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:14:13,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:13,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:14:13,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:14:13,662 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:14,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:14,513 INFO L93 Difference]: Finished difference Result 3530 states and 9050 transitions. [2020-11-11 15:14:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:14:14,514 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-11 15:14:14,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:14,519 INFO L225 Difference]: With dead ends: 3530 [2020-11-11 15:14:14,519 INFO L226 Difference]: Without dead ends: 3260 [2020-11-11 15:14:14,520 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:14:14,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2020-11-11 15:14:14,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 2487. [2020-11-11 15:14:14,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:14,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:14,568 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:14,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:14,568 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:14,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:14,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:14,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:14,571 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:14,571 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:14,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:14,772 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:14,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:14,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2124605157, now seen corresponding path program 94 times [2020-11-11 15:14:14,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:14,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809780194] [2020-11-11 15:14:14,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:15,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809780194] [2020-11-11 15:14:15,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057348241] [2020-11-11 15:14:15,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:15,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:14:15,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:15,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:14:15,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:15,228 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:15,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:15,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:15,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:14:15,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161711778] [2020-11-11 15:14:15,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:14:15,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:15,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:14:15,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:14:15,259 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:16,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:16,476 INFO L93 Difference]: Finished difference Result 3480 states and 8950 transitions. [2020-11-11 15:14:16,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:14:16,476 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-11 15:14:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:16,482 INFO L225 Difference]: With dead ends: 3480 [2020-11-11 15:14:16,482 INFO L226 Difference]: Without dead ends: 3210 [2020-11-11 15:14:16,482 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:14:16,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2020-11-11 15:14:16,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 2487. [2020-11-11 15:14:16,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:16,518 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:16,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:16,519 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:16,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:16,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:16,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:16,521 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:16,521 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:16,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-11-11 15:14:16,722 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:16,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:16,722 INFO L82 PathProgramCache]: Analyzing trace with hash 402066611, now seen corresponding path program 95 times [2020-11-11 15:14:16,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:16,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995987915] [2020-11-11 15:14:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:17,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995987915] [2020-11-11 15:14:17,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786637163] [2020-11-11 15:14:17,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:17,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 15:14:17,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:17,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:14:17,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:17,143 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:17,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:17,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:14:17,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345454473] [2020-11-11 15:14:17,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:14:17,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:17,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:14:17,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:14:17,156 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:18,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:18,121 INFO L93 Difference]: Finished difference Result 3430 states and 8850 transitions. [2020-11-11 15:14:18,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:14:18,122 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-11 15:14:18,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:18,127 INFO L225 Difference]: With dead ends: 3430 [2020-11-11 15:14:18,128 INFO L226 Difference]: Without dead ends: 3160 [2020-11-11 15:14:18,128 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=474, Invalid=1418, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:14:18,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3160 states. [2020-11-11 15:14:18,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3160 to 2487. [2020-11-11 15:14:18,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:18,170 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:18,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:18,170 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:18,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:18,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:18,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:18,172 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:18,172 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:18,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:18,381 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:18,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:18,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1137469021, now seen corresponding path program 96 times [2020-11-11 15:14:18,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:18,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602803760] [2020-11-11 15:14:18,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:18,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602803760] [2020-11-11 15:14:18,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657617265] [2020-11-11 15:14:18,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:18,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 15:14:18,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:18,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:14:18,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:18,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:18,873 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:18,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:18,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:14:18,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039573507] [2020-11-11 15:14:18,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:14:18,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:18,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:14:18,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:14:18,886 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:20,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:20,198 INFO L93 Difference]: Finished difference Result 3380 states and 8750 transitions. [2020-11-11 15:14:20,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:14:20,199 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-11 15:14:20,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:20,204 INFO L225 Difference]: With dead ends: 3380 [2020-11-11 15:14:20,204 INFO L226 Difference]: Without dead ends: 3110 [2020-11-11 15:14:20,204 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:14:20,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2020-11-11 15:14:20,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 2487. [2020-11-11 15:14:20,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:20,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:20,245 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:20,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:20,245 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:20,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:20,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:20,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:20,248 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:20,248 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:20,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-11-11 15:14:20,449 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:20,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:20,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1800931569, now seen corresponding path program 97 times [2020-11-11 15:14:20,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:20,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936678993] [2020-11-11 15:14:20,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:20,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936678993] [2020-11-11 15:14:20,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895295021] [2020-11-11 15:14:20,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:20,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:14:20,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:20,869 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:20,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:20,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:14:20,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285958610] [2020-11-11 15:14:20,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:14:20,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:20,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:14:20,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:14:20,881 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:21,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:21,981 INFO L93 Difference]: Finished difference Result 3330 states and 8650 transitions. [2020-11-11 15:14:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:14:21,982 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-11 15:14:21,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:21,987 INFO L225 Difference]: With dead ends: 3330 [2020-11-11 15:14:21,987 INFO L226 Difference]: Without dead ends: 3060 [2020-11-11 15:14:21,987 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:14:21,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3060 states. [2020-11-11 15:14:22,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3060 to 2487. [2020-11-11 15:14:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.749798873692679) internal successors, (6836), 2486 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:22,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6836 transitions. [2020-11-11 15:14:22,024 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6836 transitions. Word has length 96 [2020-11-11 15:14:22,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:22,024 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6836 transitions. [2020-11-11 15:14:22,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:22,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6836 transitions. [2020-11-11 15:14:22,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:22,027 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:22,027 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:22,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:22,227 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:22,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:22,228 INFO L82 PathProgramCache]: Analyzing trace with hash -662502943, now seen corresponding path program 98 times [2020-11-11 15:14:22,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:22,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031191904] [2020-11-11 15:14:22,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:22,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031191904] [2020-11-11 15:14:22,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471275388] [2020-11-11 15:14:22,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:22,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:22,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:22,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:14:22,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:22,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:22,659 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:22,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:22,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:14:22,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116524030] [2020-11-11 15:14:22,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:14:22,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:22,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:14:22,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:14:22,670 INFO L87 Difference]: Start difference. First operand 2487 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:24,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:24,278 INFO L93 Difference]: Finished difference Result 3709 states and 9684 transitions. [2020-11-11 15:14:24,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:14:24,279 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-11 15:14:24,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:24,284 INFO L225 Difference]: With dead ends: 3709 [2020-11-11 15:14:24,284 INFO L226 Difference]: Without dead ends: 3140 [2020-11-11 15:14:24,285 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=665, Invalid=1987, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:14:24,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2020-11-11 15:14:24,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 2427. [2020-11-11 15:14:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2426 states have (on average 2.758037922506183) internal successors, (6691), 2426 states have internal predecessors, (6691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 6691 transitions. [2020-11-11 15:14:24,329 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 6691 transitions. Word has length 96 [2020-11-11 15:14:24,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:24,329 INFO L481 AbstractCegarLoop]: Abstraction has 2427 states and 6691 transitions. [2020-11-11 15:14:24,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:24,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 6691 transitions. [2020-11-11 15:14:24,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:24,332 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:24,332 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:24,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:24,532 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:24,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:24,533 INFO L82 PathProgramCache]: Analyzing trace with hash -33711441, now seen corresponding path program 99 times [2020-11-11 15:14:24,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:24,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833776038] [2020-11-11 15:14:24,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:24,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833776038] [2020-11-11 15:14:24,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343486422] [2020-11-11 15:14:24,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:24,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 15:14:24,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:24,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:14:24,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:24,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:24,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:24,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:14:24,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026440368] [2020-11-11 15:14:24,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:14:24,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:24,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:14:24,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:14:24,979 INFO L87 Difference]: Start difference. First operand 2427 states and 6691 transitions. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:26,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:26,126 INFO L93 Difference]: Finished difference Result 4352 states and 11644 transitions. [2020-11-11 15:14:26,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:14:26,127 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-11 15:14:26,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:26,136 INFO L225 Difference]: With dead ends: 4352 [2020-11-11 15:14:26,137 INFO L226 Difference]: Without dead ends: 4082 [2020-11-11 15:14:26,137 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=641, Invalid=1615, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:14:26,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2020-11-11 15:14:26,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 2552. [2020-11-11 15:14:26,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.776166209329675) internal successors, (7082), 2551 states have internal predecessors, (7082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:26,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 7082 transitions. [2020-11-11 15:14:26,192 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 7082 transitions. Word has length 96 [2020-11-11 15:14:26,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:26,193 INFO L481 AbstractCegarLoop]: Abstraction has 2552 states and 7082 transitions. [2020-11-11 15:14:26,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:26,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 7082 transitions. [2020-11-11 15:14:26,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:14:26,196 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:26,196 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:26,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2020-11-11 15:14:26,398 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:26,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:26,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1677496513, now seen corresponding path program 100 times [2020-11-11 15:14:26,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:26,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760165675] [2020-11-11 15:14:26,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:26,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760165675] [2020-11-11 15:14:26,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980591429] [2020-11-11 15:14:26,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:26,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:14:26,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:26,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:14:26,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:26,823 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:26,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:26,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:26,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:14:26,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334477956] [2020-11-11 15:14:26,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:14:26,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:26,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:14:26,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:14:26,856 INFO L87 Difference]: Start difference. First operand 2552 states and 7082 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:28,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:28,388 INFO L93 Difference]: Finished difference Result 3391 states and 9000 transitions. [2020-11-11 15:14:28,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:14:28,389 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-11 15:14:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:28,395 INFO L225 Difference]: With dead ends: 3391 [2020-11-11 15:14:28,395 INFO L226 Difference]: Without dead ends: 2980 [2020-11-11 15:14:28,395 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:14:28,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2980 states. [2020-11-11 15:14:28,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2980 to 1902. [2020-11-11 15:14:28,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 2.6964755391899002) internal successors, (5126), 1901 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:28,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 5126 transitions. [2020-11-11 15:14:28,435 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 5126 transitions. Word has length 96 [2020-11-11 15:14:28,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:28,435 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 5126 transitions. [2020-11-11 15:14:28,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:28,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 5126 transitions. [2020-11-11 15:14:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:28,438 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:28,438 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:28,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-11-11 15:14:28,638 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:28,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:28,639 INFO L82 PathProgramCache]: Analyzing trace with hash 756357588, now seen corresponding path program 101 times [2020-11-11 15:14:28,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:28,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041176357] [2020-11-11 15:14:28,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:29,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041176357] [2020-11-11 15:14:29,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597022344] [2020-11-11 15:14:29,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:29,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 15:14:29,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:29,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:29,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:29,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:29,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:29,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:14:29,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854546643] [2020-11-11 15:14:29,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:14:29,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:29,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:14:29,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:14:29,264 INFO L87 Difference]: Start difference. First operand 1902 states and 5126 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:30,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:30,054 INFO L93 Difference]: Finished difference Result 2995 states and 7490 transitions. [2020-11-11 15:14:30,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:14:30,055 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-11 15:14:30,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:30,060 INFO L225 Difference]: With dead ends: 2995 [2020-11-11 15:14:30,060 INFO L226 Difference]: Without dead ends: 2725 [2020-11-11 15:14:30,060 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 15:14:30,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2020-11-11 15:14:30,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1952. [2020-11-11 15:14:30,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1951 states have (on average 2.7042542286007176) internal successors, (5276), 1951 states have internal predecessors, (5276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:30,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 5276 transitions. [2020-11-11 15:14:30,092 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 5276 transitions. Word has length 101 [2020-11-11 15:14:30,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:30,092 INFO L481 AbstractCegarLoop]: Abstraction has 1952 states and 5276 transitions. [2020-11-11 15:14:30,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:30,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 5276 transitions. [2020-11-11 15:14:30,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:30,094 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:30,094 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:30,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:30,296 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:30,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:30,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1392375492, now seen corresponding path program 102 times [2020-11-11 15:14:30,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:30,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260259716] [2020-11-11 15:14:30,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:30,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260259716] [2020-11-11 15:14:30,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447025106] [2020-11-11 15:14:30,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:30,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 15:14:30,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:30,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:30,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:30,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:30,988 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:31,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:31,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:14:31,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398608935] [2020-11-11 15:14:31,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:31,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:31,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:31,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:31,006 INFO L87 Difference]: Start difference. First operand 1952 states and 5276 transitions. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:32,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:32,005 INFO L93 Difference]: Finished difference Result 3340 states and 8230 transitions. [2020-11-11 15:14:32,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:14:32,006 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-11 15:14:32,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:32,010 INFO L225 Difference]: With dead ends: 3340 [2020-11-11 15:14:32,011 INFO L226 Difference]: Without dead ends: 3070 [2020-11-11 15:14:32,011 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:14:32,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2020-11-11 15:14:32,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 2002. [2020-11-11 15:14:32,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 2.7116441779110443) internal successors, (5426), 2001 states have internal predecessors, (5426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 5426 transitions. [2020-11-11 15:14:32,051 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 5426 transitions. Word has length 101 [2020-11-11 15:14:32,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:32,051 INFO L481 AbstractCegarLoop]: Abstraction has 2002 states and 5426 transitions. [2020-11-11 15:14:32,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:32,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 5426 transitions. [2020-11-11 15:14:32,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:32,053 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:32,054 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:32,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-11-11 15:14:32,254 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:32,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:32,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1502904338, now seen corresponding path program 103 times [2020-11-11 15:14:32,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:32,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215363868] [2020-11-11 15:14:32,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:32,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215363868] [2020-11-11 15:14:32,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092415394] [2020-11-11 15:14:32,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:32,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:32,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:32,831 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:32,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:32,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:14:32,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879812804] [2020-11-11 15:14:32,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:14:32,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:32,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:14:32,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:14:32,849 INFO L87 Difference]: Start difference. First operand 2002 states and 5426 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:33,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:33,812 INFO L93 Difference]: Finished difference Result 3345 states and 8290 transitions. [2020-11-11 15:14:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:14:33,813 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-11 15:14:33,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:33,818 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:14:33,818 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:14:33,818 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:14:33,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:14:33,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2052. [2020-11-11 15:14:33,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 2.7186738176499268) internal successors, (5576), 2051 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 5576 transitions. [2020-11-11 15:14:33,851 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 5576 transitions. Word has length 101 [2020-11-11 15:14:33,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:33,851 INFO L481 AbstractCegarLoop]: Abstraction has 2052 states and 5576 transitions. [2020-11-11 15:14:33,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:33,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 5576 transitions. [2020-11-11 15:14:33,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:33,853 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:33,853 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:34,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-11-11 15:14:34,054 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:34,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:34,054 INFO L82 PathProgramCache]: Analyzing trace with hash -728774398, now seen corresponding path program 104 times [2020-11-11 15:14:34,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:34,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925824900] [2020-11-11 15:14:34,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:34,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925824900] [2020-11-11 15:14:34,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471210416] [2020-11-11 15:14:34,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:34,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:34,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:34,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:34,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:34,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:34,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:34,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:34,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:14:34,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457524818] [2020-11-11 15:14:34,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:34,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:34,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:34,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:34,694 INFO L87 Difference]: Start difference. First operand 2052 states and 5576 transitions. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:35,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:35,720 INFO L93 Difference]: Finished difference Result 3345 states and 8340 transitions. [2020-11-11 15:14:35,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:14:35,720 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-11 15:14:35,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:35,725 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:14:35,725 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:14:35,726 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:14:35,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:14:35,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2102. [2020-11-11 15:14:35,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 2101 states have (on average 2.7253688719657307) internal successors, (5726), 2101 states have internal predecessors, (5726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:35,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 5726 transitions. [2020-11-11 15:14:35,761 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 5726 transitions. Word has length 101 [2020-11-11 15:14:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:35,761 INFO L481 AbstractCegarLoop]: Abstraction has 2102 states and 5726 transitions. [2020-11-11 15:14:35,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 5726 transitions. [2020-11-11 15:14:35,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:35,763 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:35,763 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:35,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-11-11 15:14:35,964 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:35,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:35,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1166738480, now seen corresponding path program 105 times [2020-11-11 15:14:35,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:35,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997414056] [2020-11-11 15:14:35,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:36,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997414056] [2020-11-11 15:14:36,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537071747] [2020-11-11 15:14:36,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:36,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 15:14:36,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:36,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:36,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:36,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:36,518 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:36,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:36,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:14:36,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185716450] [2020-11-11 15:14:36,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:14:36,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:36,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:14:36,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:14:36,520 INFO L87 Difference]: Start difference. First operand 2102 states and 5726 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:37,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:37,462 INFO L93 Difference]: Finished difference Result 3345 states and 8390 transitions. [2020-11-11 15:14:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:14:37,463 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-11 15:14:37,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:37,467 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:14:37,468 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:14:37,468 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:14:37,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:14:37,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2152. [2020-11-11 15:14:37,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 2.7317526731752673) internal successors, (5876), 2151 states have internal predecessors, (5876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 5876 transitions. [2020-11-11 15:14:37,505 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 5876 transitions. Word has length 101 [2020-11-11 15:14:37,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:37,506 INFO L481 AbstractCegarLoop]: Abstraction has 2152 states and 5876 transitions. [2020-11-11 15:14:37,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:37,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 5876 transitions. [2020-11-11 15:14:37,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:37,508 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:37,508 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:37,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:37,709 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:37,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:37,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1582936256, now seen corresponding path program 106 times [2020-11-11 15:14:37,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:37,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678192362] [2020-11-11 15:14:37,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:38,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678192362] [2020-11-11 15:14:38,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112561608] [2020-11-11 15:14:38,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:38,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:14:38,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:38,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:38,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:38,224 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:38,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:38,290 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:38,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:38,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:14:38,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403527888] [2020-11-11 15:14:38,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:38,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:38,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:38,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:38,292 INFO L87 Difference]: Start difference. First operand 2152 states and 5876 transitions. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:39,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:39,487 INFO L93 Difference]: Finished difference Result 3345 states and 8440 transitions. [2020-11-11 15:14:39,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:14:39,488 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-11 15:14:39,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:39,492 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:14:39,492 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:14:39,493 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:14:39,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:14:39,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2202. [2020-11-11 15:14:39,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 2.737846433439346) internal successors, (6026), 2201 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 6026 transitions. [2020-11-11 15:14:39,537 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 6026 transitions. Word has length 101 [2020-11-11 15:14:39,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:39,537 INFO L481 AbstractCegarLoop]: Abstraction has 2202 states and 6026 transitions. [2020-11-11 15:14:39,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:39,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 6026 transitions. [2020-11-11 15:14:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:39,540 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:39,541 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:39,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-11-11 15:14:39,754 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:39,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:39,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1015770382, now seen corresponding path program 107 times [2020-11-11 15:14:39,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:39,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35086839] [2020-11-11 15:14:39,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:40,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35086839] [2020-11-11 15:14:40,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577833581] [2020-11-11 15:14:40,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:40,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 15:14:40,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:40,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:40,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:40,294 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:40,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:40,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:14:40,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941218843] [2020-11-11 15:14:40,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:14:40,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:40,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:14:40,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:14:40,309 INFO L87 Difference]: Start difference. First operand 2202 states and 6026 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:41,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:41,334 INFO L93 Difference]: Finished difference Result 3345 states and 8490 transitions. [2020-11-11 15:14:41,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:14:41,335 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-11 15:14:41,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:41,340 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:14:41,340 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:14:41,341 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:14:41,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:14:41,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2252. [2020-11-11 15:14:41,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 2251 states have (on average 2.7436694802310084) internal successors, (6176), 2251 states have internal predecessors, (6176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:41,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 6176 transitions. [2020-11-11 15:14:41,380 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 6176 transitions. Word has length 101 [2020-11-11 15:14:41,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:41,380 INFO L481 AbstractCegarLoop]: Abstraction has 2252 states and 6176 transitions. [2020-11-11 15:14:41,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 6176 transitions. [2020-11-11 15:14:41,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:41,382 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:41,382 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:41,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-11-11 15:14:41,583 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:41,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:41,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1844481534, now seen corresponding path program 108 times [2020-11-11 15:14:41,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:41,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795558167] [2020-11-11 15:14:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:41,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795558167] [2020-11-11 15:14:41,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765081463] [2020-11-11 15:14:41,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:42,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 15:14:42,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:42,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:42,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:42,043 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:42,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:42,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:42,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:14:42,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728557700] [2020-11-11 15:14:42,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:42,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:42,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:42,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:42,105 INFO L87 Difference]: Start difference. First operand 2252 states and 6176 transitions. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:43,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:43,497 INFO L93 Difference]: Finished difference Result 3345 states and 8540 transitions. [2020-11-11 15:14:43,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:14:43,497 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-11 15:14:43,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:43,502 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:14:43,502 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:14:43,503 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=588, Invalid=1862, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:14:43,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:14:43,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2302. [2020-11-11 15:14:43,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2301 states have (on average 2.7492394611038677) internal successors, (6326), 2301 states have internal predecessors, (6326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:43,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 6326 transitions. [2020-11-11 15:14:43,544 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 6326 transitions. Word has length 101 [2020-11-11 15:14:43,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:43,544 INFO L481 AbstractCegarLoop]: Abstraction has 2302 states and 6326 transitions. [2020-11-11 15:14:43,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:43,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 6326 transitions. [2020-11-11 15:14:43,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:43,547 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:43,547 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:43,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:43,748 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:43,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:43,748 INFO L82 PathProgramCache]: Analyzing trace with hash 121942988, now seen corresponding path program 109 times [2020-11-11 15:14:43,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:43,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632795822] [2020-11-11 15:14:43,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:44,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632795822] [2020-11-11 15:14:44,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48797005] [2020-11-11 15:14:44,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:44,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:44,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:44,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:44,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:44,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:14:44,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919242458] [2020-11-11 15:14:44,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:14:44,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:44,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:14:44,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:14:44,235 INFO L87 Difference]: Start difference. First operand 2302 states and 6326 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:45,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:45,402 INFO L93 Difference]: Finished difference Result 3345 states and 8590 transitions. [2020-11-11 15:14:45,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:14:45,403 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-11 15:14:45,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:45,410 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:14:45,410 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:14:45,411 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:14:45,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:14:45,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2352. [2020-11-11 15:14:45,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.754572522330923) internal successors, (6476), 2351 states have internal predecessors, (6476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:45,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 6476 transitions. [2020-11-11 15:14:45,455 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 6476 transitions. Word has length 101 [2020-11-11 15:14:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:45,455 INFO L481 AbstractCegarLoop]: Abstraction has 2352 states and 6476 transitions. [2020-11-11 15:14:45,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:45,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 6476 transitions. [2020-11-11 15:14:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:45,458 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:45,458 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:45,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:45,659 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:45,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:45,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1417592644, now seen corresponding path program 110 times [2020-11-11 15:14:45,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:45,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843585585] [2020-11-11 15:14:45,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:46,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843585585] [2020-11-11 15:14:46,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779890292] [2020-11-11 15:14:46,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:46,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:46,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:46,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:46,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:46,156 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:46,210 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:46,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:46,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:14:46,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672077408] [2020-11-11 15:14:46,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:46,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:46,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:46,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:46,228 INFO L87 Difference]: Start difference. First operand 2352 states and 6476 transitions. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:47,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:47,663 INFO L93 Difference]: Finished difference Result 3345 states and 8640 transitions. [2020-11-11 15:14:47,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:14:47,664 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-11 15:14:47,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:47,671 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:14:47,671 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:14:47,672 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:14:47,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:14:47,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2402. [2020-11-11 15:14:47,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 2.7596834652228237) internal successors, (6626), 2401 states have internal predecessors, (6626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:47,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 6626 transitions. [2020-11-11 15:14:47,723 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 6626 transitions. Word has length 101 [2020-11-11 15:14:47,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:47,723 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 6626 transitions. [2020-11-11 15:14:47,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 6626 transitions. [2020-11-11 15:14:47,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:47,725 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:47,725 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:47,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:47,926 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:47,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:47,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1520807946, now seen corresponding path program 111 times [2020-11-11 15:14:47,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:47,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773772129] [2020-11-11 15:14:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:48,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773772129] [2020-11-11 15:14:48,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150944503] [2020-11-11 15:14:48,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:48,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 15:14:48,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:48,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:48,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:48,418 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:48,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:48,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:14:48,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588250998] [2020-11-11 15:14:48,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:14:48,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:48,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:14:48,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:14:48,431 INFO L87 Difference]: Start difference. First operand 2402 states and 6626 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:49,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:49,622 INFO L93 Difference]: Finished difference Result 3345 states and 8690 transitions. [2020-11-11 15:14:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:14:49,623 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-11 15:14:49,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:49,627 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:14:49,627 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:14:49,627 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:14:49,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:14:49,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2452. [2020-11-11 15:14:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 2.7645858833129333) internal successors, (6776), 2451 states have internal predecessors, (6776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:49,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 6776 transitions. [2020-11-11 15:14:49,666 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 6776 transitions. Word has length 101 [2020-11-11 15:14:49,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:49,666 INFO L481 AbstractCegarLoop]: Abstraction has 2452 states and 6776 transitions. [2020-11-11 15:14:49,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:49,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 6776 transitions. [2020-11-11 15:14:49,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:49,669 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:49,670 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:49,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:49,871 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:49,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:49,871 INFO L82 PathProgramCache]: Analyzing trace with hash -942626566, now seen corresponding path program 112 times [2020-11-11 15:14:49,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:49,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697957297] [2020-11-11 15:14:49,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:50,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697957297] [2020-11-11 15:14:50,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956536908] [2020-11-11 15:14:50,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:50,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:14:50,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:50,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:50,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:50,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:50,444 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:50,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:50,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:14:50,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563933796] [2020-11-11 15:14:50,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:50,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:50,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:50,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:50,460 INFO L87 Difference]: Start difference. First operand 2452 states and 6776 transitions. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:52,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:52,015 INFO L93 Difference]: Finished difference Result 3390 states and 8860 transitions. [2020-11-11 15:14:52,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:14:52,016 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-11 15:14:52,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:52,021 INFO L225 Difference]: With dead ends: 3390 [2020-11-11 15:14:52,021 INFO L226 Difference]: Without dead ends: 3120 [2020-11-11 15:14:52,021 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:14:52,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2020-11-11 15:14:52,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 2502. [2020-11-11 15:14:52,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2501 states have (on average 2.7752898840463813) internal successors, (6941), 2501 states have internal predecessors, (6941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:52,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 6941 transitions. [2020-11-11 15:14:52,080 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 6941 transitions. Word has length 101 [2020-11-11 15:14:52,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:52,080 INFO L481 AbstractCegarLoop]: Abstraction has 2502 states and 6941 transitions. [2020-11-11 15:14:52,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:52,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 6941 transitions. [2020-11-11 15:14:52,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:52,083 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:52,083 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:52,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-11-11 15:14:52,284 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:52,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:52,285 INFO L82 PathProgramCache]: Analyzing trace with hash -313835064, now seen corresponding path program 113 times [2020-11-11 15:14:52,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:52,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561618041] [2020-11-11 15:14:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:52,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561618041] [2020-11-11 15:14:52,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79226629] [2020-11-11 15:14:52,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:52,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 15:14:52,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:52,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:52,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:52,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:52,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:52,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:14:52,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786077075] [2020-11-11 15:14:52,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:14:52,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:52,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:14:52,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:14:52,764 INFO L87 Difference]: Start difference. First operand 2502 states and 6941 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:54,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:54,052 INFO L93 Difference]: Finished difference Result 4452 states and 11944 transitions. [2020-11-11 15:14:54,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:14:54,053 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-11 15:14:54,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:54,060 INFO L225 Difference]: With dead ends: 4452 [2020-11-11 15:14:54,060 INFO L226 Difference]: Without dead ends: 4182 [2020-11-11 15:14:54,061 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:14:54,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4182 states. [2020-11-11 15:14:54,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4182 to 2627. [2020-11-11 15:14:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 2.792079207920792) internal successors, (7332), 2626 states have internal predecessors, (7332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:54,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 7332 transitions. [2020-11-11 15:14:54,107 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 7332 transitions. Word has length 101 [2020-11-11 15:14:54,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:54,107 INFO L481 AbstractCegarLoop]: Abstraction has 2627 states and 7332 transitions. [2020-11-11 15:14:54,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:54,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 7332 transitions. [2020-11-11 15:14:54,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:14:54,110 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:54,110 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:54,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-11-11 15:14:54,313 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:54,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:54,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1397372890, now seen corresponding path program 114 times [2020-11-11 15:14:54,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:54,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117183151] [2020-11-11 15:14:54,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:54,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117183151] [2020-11-11 15:14:54,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115291740] [2020-11-11 15:14:54,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:54,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 15:14:54,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:54,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:14:54,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:54,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:54,829 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:54,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:54,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:14:54,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105209142] [2020-11-11 15:14:54,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:54,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:54,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:54,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:54,868 INFO L87 Difference]: Start difference. First operand 2627 states and 7332 transitions. Second operand has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:56,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:56,617 INFO L93 Difference]: Finished difference Result 3847 states and 10190 transitions. [2020-11-11 15:14:56,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:14:56,618 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-11 15:14:56,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:56,623 INFO L225 Difference]: With dead ends: 3847 [2020-11-11 15:14:56,623 INFO L226 Difference]: Without dead ends: 3320 [2020-11-11 15:14:56,623 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=896, Invalid=2526, Unknown=0, NotChecked=0, Total=3422 [2020-11-11 15:14:56,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3320 states. [2020-11-11 15:14:56,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3320 to 2637. [2020-11-11 15:14:56,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2637 states, 2636 states have (on average 2.7830045523520486) internal successors, (7336), 2636 states have internal predecessors, (7336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:56,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 7336 transitions. [2020-11-11 15:14:56,664 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 7336 transitions. Word has length 101 [2020-11-11 15:14:56,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:56,665 INFO L481 AbstractCegarLoop]: Abstraction has 2637 states and 7336 transitions. [2020-11-11 15:14:56,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:56,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 7336 transitions. [2020-11-11 15:14:56,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:14:56,668 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:56,668 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:56,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-11-11 15:14:56,884 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:56,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:56,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1563127458, now seen corresponding path program 115 times [2020-11-11 15:14:56,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:56,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681976356] [2020-11-11 15:14:56,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:57,354 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:57,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681976356] [2020-11-11 15:14:57,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967190265] [2020-11-11 15:14:57,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:57,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:57,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:57,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:57,547 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:57,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:57,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2020-11-11 15:14:57,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529735282] [2020-11-11 15:14:57,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:14:57,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:57,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:14:57,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:14:57,568 INFO L87 Difference]: Start difference. First operand 2637 states and 7336 transitions. Second operand has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:58,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:58,521 INFO L93 Difference]: Finished difference Result 3805 states and 10120 transitions. [2020-11-11 15:14:58,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:14:58,522 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-11 15:14:58,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:58,528 INFO L225 Difference]: With dead ends: 3805 [2020-11-11 15:14:58,528 INFO L226 Difference]: Without dead ends: 3471 [2020-11-11 15:14:58,528 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:14:58,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3471 states. [2020-11-11 15:14:58,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3471 to 2722. [2020-11-11 15:14:58,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 2.7585446527012127) internal successors, (7506), 2721 states have internal predecessors, (7506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:58,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 7506 transitions. [2020-11-11 15:14:58,571 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 7506 transitions. Word has length 106 [2020-11-11 15:14:58,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:58,571 INFO L481 AbstractCegarLoop]: Abstraction has 2722 states and 7506 transitions. [2020-11-11 15:14:58,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:58,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 7506 transitions. [2020-11-11 15:14:58,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:14:58,575 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:58,575 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:14:58,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:58,777 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:58,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:58,777 INFO L82 PathProgramCache]: Analyzing trace with hash 272999308, now seen corresponding path program 116 times [2020-11-11 15:14:58,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:58,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036971628] [2020-11-11 15:14:58,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:59,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036971628] [2020-11-11 15:14:59,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886277298] [2020-11-11 15:14:59,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:59,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:59,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:59,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:14:59,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:59,415 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:14:59,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:59,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:14:59,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424013115] [2020-11-11 15:14:59,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:59,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:59,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:59,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:59,435 INFO L87 Difference]: Start difference. First operand 2722 states and 7506 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:00,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:00,195 INFO L93 Difference]: Finished difference Result 4270 states and 10730 transitions. [2020-11-11 15:15:00,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:15:00,196 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-11 15:15:00,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:00,202 INFO L225 Difference]: With dead ends: 4270 [2020-11-11 15:15:00,202 INFO L226 Difference]: Without dead ends: 4000 [2020-11-11 15:15:00,203 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 15:15:00,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4000 states. [2020-11-11 15:15:00,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4000 to 2737. [2020-11-11 15:15:00,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:00,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:15:00,254 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:15:00,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:00,254 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:15:00,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:00,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:15:00,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:00,258 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:00,258 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:00,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-11-11 15:15:00,467 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:00,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:00,468 INFO L82 PathProgramCache]: Analyzing trace with hash 338891900, now seen corresponding path program 117 times [2020-11-11 15:15:00,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:00,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062056551] [2020-11-11 15:15:00,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:00,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062056551] [2020-11-11 15:15:00,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582214954] [2020-11-11 15:15:00,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:01,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:15:01,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:01,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:01,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:01,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:01,171 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:01,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:01,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:15:01,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96899512] [2020-11-11 15:15:01,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:01,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:01,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:01,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:01,190 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:02,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:02,288 INFO L93 Difference]: Finished difference Result 4155 states and 10500 transitions. [2020-11-11 15:15:02,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:15:02,289 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-11 15:15:02,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:02,297 INFO L225 Difference]: With dead ends: 4155 [2020-11-11 15:15:02,298 INFO L226 Difference]: Without dead ends: 3885 [2020-11-11 15:15:02,298 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 15:15:02,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2020-11-11 15:15:02,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 2737. [2020-11-11 15:15:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:02,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:15:02,356 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:15:02,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:02,356 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:15:02,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:02,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:15:02,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:02,360 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:02,360 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:02,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:02,561 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:02,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:02,562 INFO L82 PathProgramCache]: Analyzing trace with hash 413193290, now seen corresponding path program 118 times [2020-11-11 15:15:02,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:02,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812783629] [2020-11-11 15:15:02,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:03,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812783629] [2020-11-11 15:15:03,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826940036] [2020-11-11 15:15:03,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:03,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:15:03,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:03,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:15:03,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:03,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:03,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:03,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:15:03,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654665950] [2020-11-11 15:15:03,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:03,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:03,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:03,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:03,180 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:04,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:04,042 INFO L93 Difference]: Finished difference Result 4130 states and 10450 transitions. [2020-11-11 15:15:04,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:15:04,042 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-11 15:15:04,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:04,048 INFO L225 Difference]: With dead ends: 4130 [2020-11-11 15:15:04,048 INFO L226 Difference]: Without dead ends: 3860 [2020-11-11 15:15:04,048 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 15:15:04,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2020-11-11 15:15:04,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 2737. [2020-11-11 15:15:04,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:15:04,089 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:15:04,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:04,089 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:15:04,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:04,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:15:04,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:04,091 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:04,092 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:04,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-11-11 15:15:04,292 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:04,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:04,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1049211194, now seen corresponding path program 119 times [2020-11-11 15:15:04,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:04,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098055205] [2020-11-11 15:15:04,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:04,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098055205] [2020-11-11 15:15:04,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116106032] [2020-11-11 15:15:04,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:04,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 15:15:04,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:04,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:04,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:04,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:04,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:04,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:04,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:15:04,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695599079] [2020-11-11 15:15:04,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:04,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:04,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:04,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:04,988 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:06,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:06,258 INFO L93 Difference]: Finished difference Result 4080 states and 10350 transitions. [2020-11-11 15:15:06,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:15:06,259 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-11 15:15:06,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:06,267 INFO L225 Difference]: With dead ends: 4080 [2020-11-11 15:15:06,267 INFO L226 Difference]: Without dead ends: 3810 [2020-11-11 15:15:06,268 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:15:06,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2020-11-11 15:15:06,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 2737. [2020-11-11 15:15:06,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:06,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:15:06,326 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:15:06,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:06,326 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:15:06,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:06,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:15:06,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:06,330 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:06,331 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:06,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:06,532 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:06,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:06,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1159740040, now seen corresponding path program 120 times [2020-11-11 15:15:06,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:06,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423188205] [2020-11-11 15:15:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:07,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423188205] [2020-11-11 15:15:07,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920256202] [2020-11-11 15:15:07,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:07,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 15:15:07,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:07,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:07,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:07,171 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:07,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:07,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:15:07,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120531369] [2020-11-11 15:15:07,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:07,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:07,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:07,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:07,189 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:08,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:08,130 INFO L93 Difference]: Finished difference Result 4030 states and 10250 transitions. [2020-11-11 15:15:08,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:15:08,131 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-11 15:15:08,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:08,138 INFO L225 Difference]: With dead ends: 4030 [2020-11-11 15:15:08,138 INFO L226 Difference]: Without dead ends: 3760 [2020-11-11 15:15:08,138 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 15:15:08,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3760 states. [2020-11-11 15:15:08,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3760 to 2737. [2020-11-11 15:15:08,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:08,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:15:08,185 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:15:08,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:08,185 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:15:08,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:08,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:15:08,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:08,189 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:08,189 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:08,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2020-11-11 15:15:08,390 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:08,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:08,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1071938696, now seen corresponding path program 121 times [2020-11-11 15:15:08,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:08,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690711894] [2020-11-11 15:15:08,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:08,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690711894] [2020-11-11 15:15:08,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972452594] [2020-11-11 15:15:08,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:08,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:08,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:08,935 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:08,997 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:09,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:09,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:15:09,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962572621] [2020-11-11 15:15:09,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:09,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:09,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:09,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:09,026 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:10,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:10,371 INFO L93 Difference]: Finished difference Result 3980 states and 10150 transitions. [2020-11-11 15:15:10,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:15:10,372 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-11 15:15:10,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:10,378 INFO L225 Difference]: With dead ends: 3980 [2020-11-11 15:15:10,379 INFO L226 Difference]: Without dead ends: 3710 [2020-11-11 15:15:10,379 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:15:10,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2020-11-11 15:15:10,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 2737. [2020-11-11 15:15:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:15:10,422 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:15:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:10,422 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:15:10,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:10,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:15:10,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:10,425 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:10,425 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:10,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:10,626 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:10,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:10,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1509902778, now seen corresponding path program 122 times [2020-11-11 15:15:10,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:10,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447277139] [2020-11-11 15:15:10,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:11,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447277139] [2020-11-11 15:15:11,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748078281] [2020-11-11 15:15:11,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:11,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:15:11,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:11,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:11,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:11,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:11,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:11,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:15:11,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796044537] [2020-11-11 15:15:11,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:11,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:11,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:11,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:11,166 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:12,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:12,299 INFO L93 Difference]: Finished difference Result 3930 states and 10050 transitions. [2020-11-11 15:15:12,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:15:12,301 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-11 15:15:12,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:12,306 INFO L225 Difference]: With dead ends: 3930 [2020-11-11 15:15:12,306 INFO L226 Difference]: Without dead ends: 3660 [2020-11-11 15:15:12,307 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:15:12,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2020-11-11 15:15:12,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 2737. [2020-11-11 15:15:12,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:15:12,350 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:15:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:12,350 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:15:12,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:12,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:15:12,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:12,353 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:12,353 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:12,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-11-11 15:15:12,554 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:12,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:12,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1239771958, now seen corresponding path program 123 times [2020-11-11 15:15:12,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:12,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26182170] [2020-11-11 15:15:12,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:12,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26182170] [2020-11-11 15:15:12,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652045554] [2020-11-11 15:15:12,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:13,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:15:13,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:13,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:13,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:13,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:13,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:13,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:13,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:15:13,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379466499] [2020-11-11 15:15:13,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:13,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:13,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:13,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:13,189 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:14,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:14,686 INFO L93 Difference]: Finished difference Result 3880 states and 9950 transitions. [2020-11-11 15:15:14,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:15:14,687 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-11 15:15:14,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:14,693 INFO L225 Difference]: With dead ends: 3880 [2020-11-11 15:15:14,694 INFO L226 Difference]: Without dead ends: 3610 [2020-11-11 15:15:14,694 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=603, Invalid=1947, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 15:15:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2020-11-11 15:15:14,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2737. [2020-11-11 15:15:14,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:14,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:15:14,737 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:15:14,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:14,737 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:15:14,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:14,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:15:14,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:14,740 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:14,740 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:14,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-11-11 15:15:14,941 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:14,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:14,942 INFO L82 PathProgramCache]: Analyzing trace with hash 672606084, now seen corresponding path program 124 times [2020-11-11 15:15:14,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:14,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013263330] [2020-11-11 15:15:14,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:15,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013263330] [2020-11-11 15:15:15,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346102874] [2020-11-11 15:15:15,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:15,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:15:15,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:15,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:15:15,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:15,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:15,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:15,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:15:15,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451796810] [2020-11-11 15:15:15,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:15,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:15,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:15,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:15,544 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:16,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:16,757 INFO L93 Difference]: Finished difference Result 3830 states and 9850 transitions. [2020-11-11 15:15:16,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:15:16,757 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-11 15:15:16,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:16,763 INFO L225 Difference]: With dead ends: 3830 [2020-11-11 15:15:16,764 INFO L226 Difference]: Without dead ends: 3560 [2020-11-11 15:15:16,764 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:15:16,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3560 states. [2020-11-11 15:15:16,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3560 to 2737. [2020-11-11 15:15:16,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:15:16,805 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:15:16,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:16,805 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:15:16,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:16,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:15:16,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:16,808 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:16,808 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:17,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-11-11 15:15:17,020 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:17,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:17,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1501317236, now seen corresponding path program 125 times [2020-11-11 15:15:17,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:17,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963532372] [2020-11-11 15:15:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:17,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963532372] [2020-11-11 15:15:17,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400788040] [2020-11-11 15:15:17,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:17,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 15:15:17,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:17,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:17,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:17,560 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:17,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:17,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:17,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:15:17,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644509887] [2020-11-11 15:15:17,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:17,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:17,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:17,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:17,635 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:19,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:19,204 INFO L93 Difference]: Finished difference Result 3780 states and 9750 transitions. [2020-11-11 15:15:19,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:15:19,205 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-11 15:15:19,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:19,209 INFO L225 Difference]: With dead ends: 3780 [2020-11-11 15:15:19,210 INFO L226 Difference]: Without dead ends: 3510 [2020-11-11 15:15:19,210 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:15:19,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3510 states. [2020-11-11 15:15:19,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3510 to 2737. [2020-11-11 15:15:19,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:19,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:15:19,250 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:15:19,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:19,250 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:15:19,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:19,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:15:19,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:19,253 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:19,254 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:19,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:19,455 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:19,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:19,456 INFO L82 PathProgramCache]: Analyzing trace with hash -221221310, now seen corresponding path program 126 times [2020-11-11 15:15:19,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:19,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107670682] [2020-11-11 15:15:19,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:19,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107670682] [2020-11-11 15:15:19,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345514585] [2020-11-11 15:15:19,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:19,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 15:15:19,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:19,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:19,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:20,044 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:20,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:20,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:15:20,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675780173] [2020-11-11 15:15:20,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:20,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:20,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:20,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:20,061 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:21,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:21,400 INFO L93 Difference]: Finished difference Result 3730 states and 9650 transitions. [2020-11-11 15:15:21,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:15:21,401 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-11 15:15:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:21,406 INFO L225 Difference]: With dead ends: 3730 [2020-11-11 15:15:21,406 INFO L226 Difference]: Without dead ends: 3460 [2020-11-11 15:15:21,406 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 15:15:21,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2020-11-11 15:15:21,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 2737. [2020-11-11 15:15:21,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:21,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:15:21,450 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:15:21,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:21,450 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:15:21,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:21,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:15:21,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:21,453 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:21,453 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:21,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:21,654 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:21,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:21,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1760756942, now seen corresponding path program 127 times [2020-11-11 15:15:21,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:21,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062712601] [2020-11-11 15:15:21,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:22,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062712601] [2020-11-11 15:15:22,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035103842] [2020-11-11 15:15:22,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:22,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:22,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:22,270 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:22,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:22,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:22,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:15:22,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108022475] [2020-11-11 15:15:22,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:22,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:22,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:22,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:22,353 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:24,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:24,083 INFO L93 Difference]: Finished difference Result 3680 states and 9550 transitions. [2020-11-11 15:15:24,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:15:24,084 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-11 15:15:24,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:24,091 INFO L225 Difference]: With dead ends: 3680 [2020-11-11 15:15:24,091 INFO L226 Difference]: Without dead ends: 3410 [2020-11-11 15:15:24,092 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 15:15:24,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2020-11-11 15:15:24,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 2737. [2020-11-11 15:15:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:24,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:15:24,146 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:15:24,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:24,147 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:15:24,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:24,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:15:24,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:24,150 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:24,150 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:24,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-11-11 15:15:24,351 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:24,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:24,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1177643648, now seen corresponding path program 128 times [2020-11-11 15:15:24,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:24,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235481297] [2020-11-11 15:15:24,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:24,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235481297] [2020-11-11 15:15:24,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076039360] [2020-11-11 15:15:24,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:24,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:15:24,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:24,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:24,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:24,907 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:24,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:24,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:15:24,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282713776] [2020-11-11 15:15:24,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:24,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:24,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:24,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:24,947 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:26,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:26,366 INFO L93 Difference]: Finished difference Result 3630 states and 9450 transitions. [2020-11-11 15:15:26,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:15:26,367 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-11 15:15:26,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:26,373 INFO L225 Difference]: With dead ends: 3630 [2020-11-11 15:15:26,373 INFO L226 Difference]: Without dead ends: 3360 [2020-11-11 15:15:26,373 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:15:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2020-11-11 15:15:26,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2737. [2020-11-11 15:15:26,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:15:26,417 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:15:26,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:26,418 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:15:26,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:26,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:15:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:26,421 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:26,421 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:26,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-11-11 15:15:26,622 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:26,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:26,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1285790864, now seen corresponding path program 129 times [2020-11-11 15:15:26,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:26,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434348876] [2020-11-11 15:15:26,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:27,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434348876] [2020-11-11 15:15:27,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630330684] [2020-11-11 15:15:27,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:27,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:15:27,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:27,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:27,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:27,170 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:27,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:27,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:27,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:15:27,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922657284] [2020-11-11 15:15:27,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:27,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:27,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:27,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:27,261 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:29,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:29,171 INFO L93 Difference]: Finished difference Result 3625 states and 9460 transitions. [2020-11-11 15:15:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:15:29,171 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-11 15:15:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:29,176 INFO L225 Difference]: With dead ends: 3625 [2020-11-11 15:15:29,176 INFO L226 Difference]: Without dead ends: 3355 [2020-11-11 15:15:29,176 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=843, Invalid=2349, Unknown=0, NotChecked=0, Total=3192 [2020-11-11 15:15:29,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3355 states. [2020-11-11 15:15:29,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3355 to 2737. [2020-11-11 15:15:29,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.756213450292398) internal successors, (7541), 2736 states have internal predecessors, (7541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:29,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7541 transitions. [2020-11-11 15:15:29,221 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7541 transitions. Word has length 106 [2020-11-11 15:15:29,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:29,221 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7541 transitions. [2020-11-11 15:15:29,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:29,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7541 transitions. [2020-11-11 15:15:29,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:29,224 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:29,224 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:29,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:29,425 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:29,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:29,425 INFO L82 PathProgramCache]: Analyzing trace with hash -656999362, now seen corresponding path program 130 times [2020-11-11 15:15:29,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:29,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352333332] [2020-11-11 15:15:29,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:29,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352333332] [2020-11-11 15:15:29,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750289104] [2020-11-11 15:15:29,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:29,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:15:29,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:29,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:15:29,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:29,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:29,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:29,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:15:29,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481470436] [2020-11-11 15:15:29,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:29,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:29,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:29,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:29,946 INFO L87 Difference]: Start difference. First operand 2737 states and 7541 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:31,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:31,476 INFO L93 Difference]: Finished difference Result 4712 states and 12594 transitions. [2020-11-11 15:15:31,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:15:31,477 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-11 15:15:31,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:31,484 INFO L225 Difference]: With dead ends: 4712 [2020-11-11 15:15:31,484 INFO L226 Difference]: Without dead ends: 4442 [2020-11-11 15:15:31,484 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 15:15:31,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4442 states. [2020-11-11 15:15:31,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4442 to 2862. [2020-11-11 15:15:31,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 2.772457182803216) internal successors, (7932), 2861 states have internal predecessors, (7932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:31,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 7932 transitions. [2020-11-11 15:15:31,562 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 7932 transitions. Word has length 106 [2020-11-11 15:15:31,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:31,562 INFO L481 AbstractCegarLoop]: Abstraction has 2862 states and 7932 transitions. [2020-11-11 15:15:31,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:31,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 7932 transitions. [2020-11-11 15:15:31,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:15:31,565 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:31,565 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:31,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:31,766 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:31,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:31,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1054208592, now seen corresponding path program 131 times [2020-11-11 15:15:31,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:31,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051254124] [2020-11-11 15:15:31,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:32,144 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:32,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051254124] [2020-11-11 15:15:32,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054878705] [2020-11-11 15:15:32,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:32,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 15:15:32,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:32,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:15:32,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:32,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:32,298 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:32,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:32,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:15:32,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485265400] [2020-11-11 15:15:32,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:32,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:32,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:32,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:32,312 INFO L87 Difference]: Start difference. First operand 2862 states and 7932 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:34,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:34,280 INFO L93 Difference]: Finished difference Result 3751 states and 9950 transitions. [2020-11-11 15:15:34,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:15:34,281 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-11 15:15:34,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:34,286 INFO L225 Difference]: With dead ends: 3751 [2020-11-11 15:15:34,287 INFO L226 Difference]: Without dead ends: 3280 [2020-11-11 15:15:34,287 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=935, Invalid=2371, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:15:34,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2020-11-11 15:15:34,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2052. [2020-11-11 15:15:34,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 2.6942954656265234) internal successors, (5526), 2051 states have internal predecessors, (5526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:34,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 5526 transitions. [2020-11-11 15:15:34,322 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 5526 transitions. Word has length 106 [2020-11-11 15:15:34,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:34,323 INFO L481 AbstractCegarLoop]: Abstraction has 2052 states and 5526 transitions. [2020-11-11 15:15:34,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:34,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 5526 transitions. [2020-11-11 15:15:34,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:15:34,326 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:34,326 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:34,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:34,528 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:34,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:34,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1102839963, now seen corresponding path program 132 times [2020-11-11 15:15:34,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:34,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408959867] [2020-11-11 15:15:34,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:35,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408959867] [2020-11-11 15:15:35,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228354038] [2020-11-11 15:15:35,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:35,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 15:15:35,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:35,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:15:35,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:35,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:35,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:35,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:15:35,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459849216] [2020-11-11 15:15:35,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:35,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:35,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:35,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:35,212 INFO L87 Difference]: Start difference. First operand 2052 states and 5526 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:36,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:36,217 INFO L93 Difference]: Finished difference Result 3245 states and 8090 transitions. [2020-11-11 15:15:36,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:15:36,218 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-11 15:15:36,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:36,223 INFO L225 Difference]: With dead ends: 3245 [2020-11-11 15:15:36,223 INFO L226 Difference]: Without dead ends: 2975 [2020-11-11 15:15:36,223 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=479, Invalid=1413, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:15:36,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2020-11-11 15:15:36,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2102. [2020-11-11 15:15:36,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 2101 states have (on average 2.701570680628272) internal successors, (5676), 2101 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:36,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 5676 transitions. [2020-11-11 15:15:36,256 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 5676 transitions. Word has length 111 [2020-11-11 15:15:36,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:36,256 INFO L481 AbstractCegarLoop]: Abstraction has 2102 states and 5676 transitions. [2020-11-11 15:15:36,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:36,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 5676 transitions. [2020-11-11 15:15:36,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:15:36,259 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:36,259 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:36,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2020-11-11 15:15:36,460 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:36,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:36,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1036947371, now seen corresponding path program 133 times [2020-11-11 15:15:36,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:36,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392048250] [2020-11-11 15:15:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:37,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392048250] [2020-11-11 15:15:37,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836495186] [2020-11-11 15:15:37,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:37,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:15:37,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:37,167 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:37,189 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:37,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:37,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:15:37,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069889209] [2020-11-11 15:15:37,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:37,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:37,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:37,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:37,209 INFO L87 Difference]: Start difference. First operand 2102 states and 5676 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:38,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:38,431 INFO L93 Difference]: Finished difference Result 3640 states and 8930 transitions. [2020-11-11 15:15:38,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:15:38,432 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-11 15:15:38,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:38,437 INFO L225 Difference]: With dead ends: 3640 [2020-11-11 15:15:38,438 INFO L226 Difference]: Without dead ends: 3370 [2020-11-11 15:15:38,438 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=529, Invalid=1633, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:15:38,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3370 states. [2020-11-11 15:15:38,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3370 to 2152. [2020-11-11 15:15:38,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 2.708507670850767) internal successors, (5826), 2151 states have internal predecessors, (5826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 5826 transitions. [2020-11-11 15:15:38,474 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 5826 transitions. Word has length 111 [2020-11-11 15:15:38,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:38,474 INFO L481 AbstractCegarLoop]: Abstraction has 2152 states and 5826 transitions. [2020-11-11 15:15:38,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:38,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 5826 transitions. [2020-11-11 15:15:38,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:15:38,477 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:38,477 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:38,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-11-11 15:15:38,678 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:38,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:38,679 INFO L82 PathProgramCache]: Analyzing trace with hash -962645981, now seen corresponding path program 134 times [2020-11-11 15:15:38,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:38,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119943052] [2020-11-11 15:15:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:39,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119943052] [2020-11-11 15:15:39,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137451113] [2020-11-11 15:15:39,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:39,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:15:39,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:39,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:15:39,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:39,251 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:39,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:39,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:15:39,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974588016] [2020-11-11 15:15:39,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:39,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:39,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:39,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:39,270 INFO L87 Difference]: Start difference. First operand 2152 states and 5826 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:40,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:40,361 INFO L93 Difference]: Finished difference Result 3645 states and 8990 transitions. [2020-11-11 15:15:40,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:15:40,362 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-11 15:15:40,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:40,367 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:15:40,367 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:15:40,368 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=531, Invalid=1631, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:15:40,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:15:40,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2202. [2020-11-11 15:15:40,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 2.7151294865970015) internal successors, (5976), 2201 states have internal predecessors, (5976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:40,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 5976 transitions. [2020-11-11 15:15:40,406 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 5976 transitions. Word has length 111 [2020-11-11 15:15:40,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:40,406 INFO L481 AbstractCegarLoop]: Abstraction has 2202 states and 5976 transitions. [2020-11-11 15:15:40,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:40,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 5976 transitions. [2020-11-11 15:15:40,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:15:40,408 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:40,408 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:40,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-11-11 15:15:40,609 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:40,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:40,610 INFO L82 PathProgramCache]: Analyzing trace with hash -326628077, now seen corresponding path program 135 times [2020-11-11 15:15:40,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:40,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530062574] [2020-11-11 15:15:40,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:41,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530062574] [2020-11-11 15:15:41,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891434542] [2020-11-11 15:15:41,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:41,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:15:41,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:41,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:15:41,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:41,255 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:41,275 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:41,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:41,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:15:41,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917236531] [2020-11-11 15:15:41,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:41,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:41,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:41,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:41,297 INFO L87 Difference]: Start difference. First operand 2202 states and 5976 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:42,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:42,584 INFO L93 Difference]: Finished difference Result 3645 states and 9040 transitions. [2020-11-11 15:15:42,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:15:42,585 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-11 15:15:42,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:42,590 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:15:42,590 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:15:42,590 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=553, Invalid=1799, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:15:42,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:15:42,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2252. [2020-11-11 15:15:42,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 2251 states have (on average 2.7214571301643713) internal successors, (6126), 2251 states have internal predecessors, (6126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:42,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 6126 transitions. [2020-11-11 15:15:42,631 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 6126 transitions. Word has length 111 [2020-11-11 15:15:42,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:42,632 INFO L481 AbstractCegarLoop]: Abstraction has 2252 states and 6126 transitions. [2020-11-11 15:15:42,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:42,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 6126 transitions. [2020-11-11 15:15:42,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:15:42,634 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:42,634 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:42,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-11-11 15:15:42,835 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:42,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:42,836 INFO L82 PathProgramCache]: Analyzing trace with hash -216099231, now seen corresponding path program 136 times [2020-11-11 15:15:42,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:42,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592764730] [2020-11-11 15:15:42,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:43,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592764730] [2020-11-11 15:15:43,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394059533] [2020-11-11 15:15:43,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:43,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:15:43,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:43,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:43,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:43,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:43,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:43,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:15:43,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591214960] [2020-11-11 15:15:43,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:43,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:43,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:43,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:43,541 INFO L87 Difference]: Start difference. First operand 2252 states and 6126 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:44,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:44,903 INFO L93 Difference]: Finished difference Result 3645 states and 9090 transitions. [2020-11-11 15:15:44,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:15:44,904 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-11 15:15:44,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:44,910 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:15:44,910 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:15:44,910 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=569, Invalid=1783, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:15:44,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:15:44,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2302. [2020-11-11 15:15:44,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2301 states have (on average 2.727509778357236) internal successors, (6276), 2301 states have internal predecessors, (6276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:44,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 6276 transitions. [2020-11-11 15:15:44,953 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 6276 transitions. Word has length 111 [2020-11-11 15:15:44,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:44,953 INFO L481 AbstractCegarLoop]: Abstraction has 2302 states and 6276 transitions. [2020-11-11 15:15:44,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:44,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 6276 transitions. [2020-11-11 15:15:44,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:15:44,956 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:44,956 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:45,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-11-11 15:15:45,157 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:45,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:45,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1847189329, now seen corresponding path program 137 times [2020-11-11 15:15:45,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:45,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230715253] [2020-11-11 15:15:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:45,636 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:45,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230715253] [2020-11-11 15:15:45,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859223814] [2020-11-11 15:15:45,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:45,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 15:15:45,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:45,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:15:45,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:45,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:45,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:45,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:45,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:15:45,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390301176] [2020-11-11 15:15:45,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:45,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:45,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:45,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:45,798 INFO L87 Difference]: Start difference. First operand 2302 states and 6276 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:47,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:47,273 INFO L93 Difference]: Finished difference Result 3645 states and 9140 transitions. [2020-11-11 15:15:47,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:15:47,274 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-11 15:15:47,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:47,280 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:15:47,280 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:15:47,280 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=593, Invalid=1957, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 15:15:47,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:15:47,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2352. [2020-11-11 15:15:47,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.7333049766057) internal successors, (6426), 2351 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:47,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 6426 transitions. [2020-11-11 15:15:47,344 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 6426 transitions. Word has length 111 [2020-11-11 15:15:47,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:47,344 INFO L481 AbstractCegarLoop]: Abstraction has 2352 states and 6426 transitions. [2020-11-11 15:15:47,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:47,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 6426 transitions. [2020-11-11 15:15:47,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:15:47,347 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:47,347 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:47,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-11-11 15:15:47,548 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:47,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:47,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1409225247, now seen corresponding path program 138 times [2020-11-11 15:15:47,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:47,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189452993] [2020-11-11 15:15:47,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:47,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189452993] [2020-11-11 15:15:47,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918465590] [2020-11-11 15:15:47,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:48,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 15:15:48,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:48,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:15:48,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:48,126 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:48,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:48,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:15:48,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365416282] [2020-11-11 15:15:48,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:48,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:48,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:48,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:48,144 INFO L87 Difference]: Start difference. First operand 2352 states and 6426 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:49,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:49,421 INFO L93 Difference]: Finished difference Result 3645 states and 9190 transitions. [2020-11-11 15:15:49,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:15:49,422 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-11 15:15:49,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:49,428 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:15:49,428 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:15:49,429 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=623, Invalid=1927, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 15:15:49,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:15:49,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2402. [2020-11-11 15:15:49,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 2.7388588088296544) internal successors, (6576), 2401 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:49,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 6576 transitions. [2020-11-11 15:15:49,475 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 6576 transitions. Word has length 111 [2020-11-11 15:15:49,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:49,475 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 6576 transitions. [2020-11-11 15:15:49,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:49,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 6576 transitions. [2020-11-11 15:15:49,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:15:49,477 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:49,477 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:49,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:49,678 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:49,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:49,679 INFO L82 PathProgramCache]: Analyzing trace with hash -136067313, now seen corresponding path program 139 times [2020-11-11 15:15:49,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:49,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349349341] [2020-11-11 15:15:49,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:50,147 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:50,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349349341] [2020-11-11 15:15:50,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881084189] [2020-11-11 15:15:50,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:50,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:15:50,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:50,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:50,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:50,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:50,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:15:50,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990564435] [2020-11-11 15:15:50,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:50,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:50,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:50,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:50,345 INFO L87 Difference]: Start difference. First operand 2402 states and 6576 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:51,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:51,863 INFO L93 Difference]: Finished difference Result 3645 states and 9240 transitions. [2020-11-11 15:15:51,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:15:51,864 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-11 15:15:51,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:51,868 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:15:51,868 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:15:51,868 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=649, Invalid=2107, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:15:51,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:15:51,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2452. [2020-11-11 15:15:51,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 2.744186046511628) internal successors, (6726), 2451 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:51,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 6726 transitions. [2020-11-11 15:15:51,917 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 6726 transitions. Word has length 111 [2020-11-11 15:15:51,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:51,918 INFO L481 AbstractCegarLoop]: Abstraction has 2452 states and 6726 transitions. [2020-11-11 15:15:51,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:51,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 6726 transitions. [2020-11-11 15:15:51,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:15:51,921 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:51,921 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:52,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-11-11 15:15:52,135 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:52,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:52,136 INFO L82 PathProgramCache]: Analyzing trace with hash -703233187, now seen corresponding path program 140 times [2020-11-11 15:15:52,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:52,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269324406] [2020-11-11 15:15:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:52,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269324406] [2020-11-11 15:15:52,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768093544] [2020-11-11 15:15:52,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:52,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:15:52,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:52,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:15:52,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:52,746 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:52,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:52,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:15:52,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248291279] [2020-11-11 15:15:52,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:52,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:52,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:52,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:52,763 INFO L87 Difference]: Start difference. First operand 2452 states and 6726 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:54,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:54,093 INFO L93 Difference]: Finished difference Result 3645 states and 9290 transitions. [2020-11-11 15:15:54,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:15:54,094 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-11 15:15:54,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:54,099 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:15:54,099 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:15:54,100 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=693, Invalid=2063, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:15:54,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:15:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2502. [2020-11-11 15:15:54,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2501 states have (on average 2.7493002798880446) internal successors, (6876), 2501 states have internal predecessors, (6876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:54,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 6876 transitions. [2020-11-11 15:15:54,142 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 6876 transitions. Word has length 111 [2020-11-11 15:15:54,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:54,142 INFO L481 AbstractCegarLoop]: Abstraction has 2502 states and 6876 transitions. [2020-11-11 15:15:54,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:54,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 6876 transitions. [2020-11-11 15:15:54,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:15:54,145 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:54,145 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:54,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:54,347 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:54,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:54,348 INFO L82 PathProgramCache]: Analyzing trace with hash 125477965, now seen corresponding path program 141 times [2020-11-11 15:15:54,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:54,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099758917] [2020-11-11 15:15:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:54,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099758917] [2020-11-11 15:15:54,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701863385] [2020-11-11 15:15:54,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:54,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:15:54,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:54,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:15:54,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:54,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:54,983 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:54,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:54,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:15:54,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022701328] [2020-11-11 15:15:54,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:54,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:54,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:54,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:54,999 INFO L87 Difference]: Start difference. First operand 2502 states and 6876 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:56,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:56,732 INFO L93 Difference]: Finished difference Result 3645 states and 9340 transitions. [2020-11-11 15:15:56,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:15:56,733 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-11 15:15:56,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:56,738 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:15:56,738 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:15:56,738 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 15:15:56,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:15:56,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2552. [2020-11-11 15:15:56,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.7542140337122696) internal successors, (7026), 2551 states have internal predecessors, (7026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 7026 transitions. [2020-11-11 15:15:56,808 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 7026 transitions. Word has length 111 [2020-11-11 15:15:56,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:56,809 INFO L481 AbstractCegarLoop]: Abstraction has 2552 states and 7026 transitions. [2020-11-11 15:15:56,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 7026 transitions. [2020-11-11 15:15:56,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:15:56,812 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:56,812 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:57,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:57,013 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:57,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:57,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1597060581, now seen corresponding path program 142 times [2020-11-11 15:15:57,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:57,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534999936] [2020-11-11 15:15:57,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:57,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534999936] [2020-11-11 15:15:57,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265308799] [2020-11-11 15:15:57,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:57,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:15:57,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:57,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:57,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:57,575 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:57,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:57,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:15:57,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831467427] [2020-11-11 15:15:57,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:15:57,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:57,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:15:57,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:15:57,591 INFO L87 Difference]: Start difference. First operand 2552 states and 7026 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:59,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:59,063 INFO L93 Difference]: Finished difference Result 3645 states and 9390 transitions. [2020-11-11 15:15:59,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:15:59,065 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-11 15:15:59,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:59,070 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:15:59,070 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:15:59,071 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=779, Invalid=2191, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 15:15:59,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:15:59,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2602. [2020-11-11 15:15:59,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2602 states, 2601 states have (on average 2.758938869665513) internal successors, (7176), 2601 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:59,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 7176 transitions. [2020-11-11 15:15:59,123 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 7176 transitions. Word has length 111 [2020-11-11 15:15:59,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:59,124 INFO L481 AbstractCegarLoop]: Abstraction has 2602 states and 7176 transitions. [2020-11-11 15:15:59,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:59,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 7176 transitions. [2020-11-11 15:15:59,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:15:59,127 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:59,127 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:15:59,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:59,328 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:59,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:59,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1158371083, now seen corresponding path program 143 times [2020-11-11 15:15:59,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:59,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646447542] [2020-11-11 15:15:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:59,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646447542] [2020-11-11 15:15:59,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168663202] [2020-11-11 15:15:59,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:59,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 15:15:59,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:59,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:15:59,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:59,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:59,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:15:59,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:59,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:15:59,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040686761] [2020-11-11 15:15:59,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:59,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:59,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:59,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:59,941 INFO L87 Difference]: Start difference. First operand 2602 states and 7176 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:01,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:01,745 INFO L93 Difference]: Finished difference Result 3645 states and 9440 transitions. [2020-11-11 15:16:01,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:16:01,746 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-11 15:16:01,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:01,751 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:16:01,751 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:16:01,752 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=809, Invalid=2383, Unknown=0, NotChecked=0, Total=3192 [2020-11-11 15:16:01,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:16:01,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2652. [2020-11-11 15:16:01,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 2.763485477178423) internal successors, (7326), 2651 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:01,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 7326 transitions. [2020-11-11 15:16:01,797 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 7326 transitions. Word has length 111 [2020-11-11 15:16:01,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:01,797 INFO L481 AbstractCegarLoop]: Abstraction has 2652 states and 7326 transitions. [2020-11-11 15:16:01,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:01,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 7326 transitions. [2020-11-11 15:16:01,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:16:01,800 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:01,800 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:02,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:02,000 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:02,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:02,001 INFO L82 PathProgramCache]: Analyzing trace with hash -198195623, now seen corresponding path program 144 times [2020-11-11 15:16:02,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:02,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929414487] [2020-11-11 15:16:02,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:02,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929414487] [2020-11-11 15:16:02,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058677646] [2020-11-11 15:16:02,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:02,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 15:16:02,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:02,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:16:02,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:02,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:02,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:02,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:16:02,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305058637] [2020-11-11 15:16:02,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:16:02,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:02,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:16:02,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:16:02,547 INFO L87 Difference]: Start difference. First operand 2652 states and 7326 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:04,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:04,101 INFO L93 Difference]: Finished difference Result 3645 states and 9490 transitions. [2020-11-11 15:16:04,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:16:04,101 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-11 15:16:04,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:04,107 INFO L225 Difference]: With dead ends: 3645 [2020-11-11 15:16:04,107 INFO L226 Difference]: Without dead ends: 3375 [2020-11-11 15:16:04,107 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=881, Invalid=2311, Unknown=0, NotChecked=0, Total=3192 [2020-11-11 15:16:04,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-11-11 15:16:04,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2702. [2020-11-11 15:16:04,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2702 states, 2701 states have (on average 2.767863754165124) internal successors, (7476), 2701 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:04,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2702 states to 2702 states and 7476 transitions. [2020-11-11 15:16:04,152 INFO L78 Accepts]: Start accepts. Automaton has 2702 states and 7476 transitions. Word has length 111 [2020-11-11 15:16:04,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:04,152 INFO L481 AbstractCegarLoop]: Abstraction has 2702 states and 7476 transitions. [2020-11-11 15:16:04,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:04,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2702 states and 7476 transitions. [2020-11-11 15:16:04,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:16:04,156 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:04,156 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:04,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-11-11 15:16:04,357 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:04,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:04,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1633337161, now seen corresponding path program 145 times [2020-11-11 15:16:04,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:04,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3028945] [2020-11-11 15:16:04,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:04,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3028945] [2020-11-11 15:16:04,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861246546] [2020-11-11 15:16:04,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:04,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:16:04,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:04,963 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:04,995 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:05,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:05,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:16:05,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038033396] [2020-11-11 15:16:05,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:16:05,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:05,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:16:05,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:16:05,011 INFO L87 Difference]: Start difference. First operand 2702 states and 7476 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:07,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:07,018 INFO L93 Difference]: Finished difference Result 3690 states and 9660 transitions. [2020-11-11 15:16:07,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:16:07,019 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-11 15:16:07,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:07,024 INFO L225 Difference]: With dead ends: 3690 [2020-11-11 15:16:07,025 INFO L226 Difference]: Without dead ends: 3420 [2020-11-11 15:16:07,025 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=913, Invalid=2509, Unknown=0, NotChecked=0, Total=3422 [2020-11-11 15:16:07,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2020-11-11 15:16:07,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 2752. [2020-11-11 15:16:07,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2751 states have (on average 2.7775354416575793) internal successors, (7641), 2751 states have internal predecessors, (7641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:07,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 7641 transitions. [2020-11-11 15:16:07,073 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 7641 transitions. Word has length 111 [2020-11-11 15:16:07,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:07,074 INFO L481 AbstractCegarLoop]: Abstraction has 2752 states and 7641 transitions. [2020-11-11 15:16:07,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:07,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 7641 transitions. [2020-11-11 15:16:07,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:16:07,077 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:07,077 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:07,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-11-11 15:16:07,277 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:07,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:07,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2032838633, now seen corresponding path program 146 times [2020-11-11 15:16:07,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:07,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904591394] [2020-11-11 15:16:07,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:07,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904591394] [2020-11-11 15:16:07,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281235560] [2020-11-11 15:16:07,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:07,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:16:07,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:07,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:16:07,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:07,968 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:07,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:07,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:16:07,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451685966] [2020-11-11 15:16:07,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:16:07,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:07,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:16:07,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:16:07,986 INFO L87 Difference]: Start difference. First operand 2752 states and 7641 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:09,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:09,642 INFO L93 Difference]: Finished difference Result 4752 states and 12744 transitions. [2020-11-11 15:16:09,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:16:09,643 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-11 15:16:09,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:09,649 INFO L225 Difference]: With dead ends: 4752 [2020-11-11 15:16:09,649 INFO L226 Difference]: Without dead ends: 4482 [2020-11-11 15:16:09,650 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1000, Invalid=2422, Unknown=0, NotChecked=0, Total=3422 [2020-11-11 15:16:09,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4482 states. [2020-11-11 15:16:09,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4482 to 2877. [2020-11-11 15:16:09,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2877 states, 2876 states have (on average 2.7927677329624476) internal successors, (8032), 2876 states have internal predecessors, (8032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 8032 transitions. [2020-11-11 15:16:09,702 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 8032 transitions. Word has length 111 [2020-11-11 15:16:09,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:09,702 INFO L481 AbstractCegarLoop]: Abstraction has 2877 states and 8032 transitions. [2020-11-11 15:16:09,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:09,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 8032 transitions. [2020-11-11 15:16:09,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:16:09,705 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:09,705 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:09,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-11-11 15:16:09,906 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:09,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:09,907 INFO L82 PathProgramCache]: Analyzing trace with hash -321630679, now seen corresponding path program 147 times [2020-11-11 15:16:09,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:09,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814178383] [2020-11-11 15:16:09,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:10,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814178383] [2020-11-11 15:16:10,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260113364] [2020-11-11 15:16:10,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:10,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:16:10,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:10,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:16:10,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:10,548 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:10,573 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:10,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:10,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:16:10,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389055916] [2020-11-11 15:16:10,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:16:10,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:10,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:16:10,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:16:10,588 INFO L87 Difference]: Start difference. First operand 2877 states and 8032 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:12,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:12,651 INFO L93 Difference]: Finished difference Result 3766 states and 10050 transitions. [2020-11-11 15:16:12,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:16:12,653 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-11 15:16:12,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:12,658 INFO L225 Difference]: With dead ends: 3766 [2020-11-11 15:16:12,658 INFO L226 Difference]: Without dead ends: 3355 [2020-11-11 15:16:12,659 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1036, Invalid=2624, Unknown=0, NotChecked=0, Total=3660 [2020-11-11 15:16:12,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3355 states. [2020-11-11 15:16:12,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3355 to 1991. [2020-11-11 15:16:12,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1990 states have (on average 2.6974874371859294) internal successors, (5368), 1990 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:12,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 5368 transitions. [2020-11-11 15:16:12,707 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 5368 transitions. Word has length 111 [2020-11-11 15:16:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:12,707 INFO L481 AbstractCegarLoop]: Abstraction has 1991 states and 5368 transitions. [2020-11-11 15:16:12,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:12,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 5368 transitions. [2020-11-11 15:16:12,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:12,709 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:12,709 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:12,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-11-11 15:16:12,910 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:12,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:12,911 INFO L82 PathProgramCache]: Analyzing trace with hash -475852177, now seen corresponding path program 148 times [2020-11-11 15:16:12,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:12,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135834038] [2020-11-11 15:16:12,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:13,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135834038] [2020-11-11 15:16:13,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538876643] [2020-11-11 15:16:13,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:13,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:16:13,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:13,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:16:13,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:13,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:13,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:13,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:13,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:16:13,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190930622] [2020-11-11 15:16:13,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:16:13,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:13,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:16:13,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:16:13,786 INFO L87 Difference]: Start difference. First operand 1991 states and 5368 transitions. Second operand has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 26 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:15,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:15,103 INFO L93 Difference]: Finished difference Result 3209 states and 8252 transitions. [2020-11-11 15:16:15,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:16:15,105 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 26 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-11 15:16:15,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:15,109 INFO L225 Difference]: With dead ends: 3209 [2020-11-11 15:16:15,110 INFO L226 Difference]: Without dead ends: 2875 [2020-11-11 15:16:15,110 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=645, Invalid=1805, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:16:15,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2020-11-11 15:16:15,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2076. [2020-11-11 15:16:15,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 2.6689156626506025) internal successors, (5538), 2075 states have internal predecessors, (5538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:15,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 5538 transitions. [2020-11-11 15:16:15,150 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 5538 transitions. Word has length 116 [2020-11-11 15:16:15,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:15,151 INFO L481 AbstractCegarLoop]: Abstraction has 2076 states and 5538 transitions. [2020-11-11 15:16:15,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 26 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:15,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 5538 transitions. [2020-11-11 15:16:15,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:15,154 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:15,154 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:15,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:15,355 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:15,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:15,356 INFO L82 PathProgramCache]: Analyzing trace with hash -847396067, now seen corresponding path program 149 times [2020-11-11 15:16:15,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:15,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163242535] [2020-11-11 15:16:15,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:15,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163242535] [2020-11-11 15:16:15,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978320950] [2020-11-11 15:16:15,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:16,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:16:16,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:16,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:16,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:16,046 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:16,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:16,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:16:16,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43701665] [2020-11-11 15:16:16,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:16:16,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:16,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:16:16,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:16:16,067 INFO L87 Difference]: Start difference. First operand 2076 states and 5538 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:17,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:17,098 INFO L93 Difference]: Finished difference Result 3860 states and 9320 transitions. [2020-11-11 15:16:17,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:16:17,098 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-11 15:16:17,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:17,105 INFO L225 Difference]: With dead ends: 3860 [2020-11-11 15:16:17,105 INFO L226 Difference]: Without dead ends: 3590 [2020-11-11 15:16:17,105 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=512, Invalid=1380, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:16:17,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3590 states. [2020-11-11 15:16:17,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3590 to 2177. [2020-11-11 15:16:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 2.677389705882353) internal successors, (5826), 2176 states have internal predecessors, (5826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:17,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 5826 transitions. [2020-11-11 15:16:17,148 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 5826 transitions. Word has length 116 [2020-11-11 15:16:17,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:17,148 INFO L481 AbstractCegarLoop]: Abstraction has 2177 states and 5826 transitions. [2020-11-11 15:16:17,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:17,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 5826 transitions. [2020-11-11 15:16:17,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:17,151 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:17,151 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:17,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-11-11 15:16:17,355 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:17,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:17,355 INFO L82 PathProgramCache]: Analyzing trace with hash 835110925, now seen corresponding path program 150 times [2020-11-11 15:16:17,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:17,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444201733] [2020-11-11 15:16:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:18,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444201733] [2020-11-11 15:16:18,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224611334] [2020-11-11 15:16:18,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:18,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:16:18,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:18,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:18,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:18,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:18,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:18,195 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:18,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:18,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:16:18,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597310096] [2020-11-11 15:16:18,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:16:18,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:18,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:16:18,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:16:18,196 INFO L87 Difference]: Start difference. First operand 2177 states and 5826 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:19,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:19,379 INFO L93 Difference]: Finished difference Result 3795 states and 9240 transitions. [2020-11-11 15:16:19,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:16:19,380 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-11 15:16:19,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:19,385 INFO L225 Difference]: With dead ends: 3795 [2020-11-11 15:16:19,385 INFO L226 Difference]: Without dead ends: 3525 [2020-11-11 15:16:19,385 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=575, Invalid=1681, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:16:19,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3525 states. [2020-11-11 15:16:19,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3525 to 2227. [2020-11-11 15:16:19,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2227 states, 2226 states have (on average 2.684636118598383) internal successors, (5976), 2226 states have internal predecessors, (5976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:19,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 5976 transitions. [2020-11-11 15:16:19,423 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 5976 transitions. Word has length 116 [2020-11-11 15:16:19,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:19,424 INFO L481 AbstractCegarLoop]: Abstraction has 2227 states and 5976 transitions. [2020-11-11 15:16:19,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:19,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 5976 transitions. [2020-11-11 15:16:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:19,446 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:19,446 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:19,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:19,647 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:19,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:19,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1017536933, now seen corresponding path program 151 times [2020-11-11 15:16:19,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:19,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884821958] [2020-11-11 15:16:19,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:20,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884821958] [2020-11-11 15:16:20,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665580389] [2020-11-11 15:16:20,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:20,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:20,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:20,349 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:20,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:20,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:16:20,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894267333] [2020-11-11 15:16:20,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:16:20,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:20,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:16:20,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:16:20,370 INFO L87 Difference]: Start difference. First operand 2227 states and 5976 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:21,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:21,646 INFO L93 Difference]: Finished difference Result 3820 states and 9340 transitions. [2020-11-11 15:16:21,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:16:21,648 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-11 15:16:21,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:21,653 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:21,653 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:21,654 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=519, Invalid=1551, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:16:21,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2277. [2020-11-11 15:16:21,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 2276 states have (on average 2.6915641476274166) internal successors, (6126), 2276 states have internal predecessors, (6126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:21,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 6126 transitions. [2020-11-11 15:16:21,725 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 6126 transitions. Word has length 116 [2020-11-11 15:16:21,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:21,725 INFO L481 AbstractCegarLoop]: Abstraction has 2277 states and 6126 transitions. [2020-11-11 15:16:21,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:21,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 6126 transitions. [2020-11-11 15:16:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:21,730 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:21,730 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:21,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:21,945 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:21,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:21,945 INFO L82 PathProgramCache]: Analyzing trace with hash -951644341, now seen corresponding path program 152 times [2020-11-11 15:16:21,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:21,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886111530] [2020-11-11 15:16:21,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:22,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886111530] [2020-11-11 15:16:22,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755770034] [2020-11-11 15:16:22,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:22,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:16:22,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:22,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:22,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:22,779 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:22,803 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:22,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:22,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:16:22,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258992239] [2020-11-11 15:16:22,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:16:22,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:22,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:16:22,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:16:22,851 INFO L87 Difference]: Start difference. First operand 2277 states and 6126 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:24,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:24,393 INFO L93 Difference]: Finished difference Result 3820 states and 9390 transitions. [2020-11-11 15:16:24,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:16:24,395 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-11 15:16:24,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:24,401 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:24,401 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:24,401 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=590, Invalid=1860, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:16:24,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:24,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2327. [2020-11-11 15:16:24,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2327 states, 2326 states have (on average 2.698194325021496) internal successors, (6276), 2326 states have internal predecessors, (6276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 6276 transitions. [2020-11-11 15:16:24,455 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 6276 transitions. Word has length 116 [2020-11-11 15:16:24,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:24,455 INFO L481 AbstractCegarLoop]: Abstraction has 2327 states and 6276 transitions. [2020-11-11 15:16:24,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:24,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 6276 transitions. [2020-11-11 15:16:24,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:24,458 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:24,458 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:24,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:24,659 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:24,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:24,660 INFO L82 PathProgramCache]: Analyzing trace with hash -877342951, now seen corresponding path program 153 times [2020-11-11 15:16:24,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:24,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025307379] [2020-11-11 15:16:24,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:25,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025307379] [2020-11-11 15:16:25,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682707211] [2020-11-11 15:16:25,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:25,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:16:25,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:25,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:25,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:25,395 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:25,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:25,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:16:25,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535156540] [2020-11-11 15:16:25,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:16:25,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:25,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:16:25,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:16:25,416 INFO L87 Difference]: Start difference. First operand 2327 states and 6276 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:26,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:26,798 INFO L93 Difference]: Finished difference Result 3820 states and 9440 transitions. [2020-11-11 15:16:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:16:26,799 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-11 15:16:26,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:26,804 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:26,805 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:26,805 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=542, Invalid=1714, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:16:26,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:26,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2377. [2020-11-11 15:16:26,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2376 states have (on average 2.7045454545454546) internal successors, (6426), 2376 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 6426 transitions. [2020-11-11 15:16:26,855 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 6426 transitions. Word has length 116 [2020-11-11 15:16:26,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:26,855 INFO L481 AbstractCegarLoop]: Abstraction has 2377 states and 6426 transitions. [2020-11-11 15:16:26,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 6426 transitions. [2020-11-11 15:16:26,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:26,858 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:26,858 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:27,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2020-11-11 15:16:27,059 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:27,061 INFO L82 PathProgramCache]: Analyzing trace with hash -241325047, now seen corresponding path program 154 times [2020-11-11 15:16:27,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:27,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716856878] [2020-11-11 15:16:27,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:27,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716856878] [2020-11-11 15:16:27,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890704341] [2020-11-11 15:16:27,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:27,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:16:27,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:27,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:16:27,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:27,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:27,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:27,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:27,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:16:27,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520658837] [2020-11-11 15:16:27,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:16:27,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:27,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:16:27,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:16:27,932 INFO L87 Difference]: Start difference. First operand 2377 states and 6426 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:29,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:29,648 INFO L93 Difference]: Finished difference Result 3820 states and 9490 transitions. [2020-11-11 15:16:29,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:16:29,649 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-11 15:16:29,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:29,655 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:29,655 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:29,656 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=621, Invalid=2031, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:16:29,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:29,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2427. [2020-11-11 15:16:29,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2426 states have (on average 2.7106347897774112) internal successors, (6576), 2426 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:29,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 6576 transitions. [2020-11-11 15:16:29,708 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 6576 transitions. Word has length 116 [2020-11-11 15:16:29,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:29,708 INFO L481 AbstractCegarLoop]: Abstraction has 2427 states and 6576 transitions. [2020-11-11 15:16:29,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:29,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 6576 transitions. [2020-11-11 15:16:29,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:29,712 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:29,712 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:29,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:29,913 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:29,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:29,914 INFO L82 PathProgramCache]: Analyzing trace with hash -130796201, now seen corresponding path program 155 times [2020-11-11 15:16:29,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:29,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495460129] [2020-11-11 15:16:29,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:30,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495460129] [2020-11-11 15:16:30,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453636532] [2020-11-11 15:16:30,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:30,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:16:30,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:30,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:30,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:30,645 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:30,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:30,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:16:30,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936832210] [2020-11-11 15:16:30,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:16:30,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:30,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:16:30,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:16:30,678 INFO L87 Difference]: Start difference. First operand 2427 states and 6576 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:32,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:32,201 INFO L93 Difference]: Finished difference Result 3820 states and 9540 transitions. [2020-11-11 15:16:32,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:16:32,202 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-11 15:16:32,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:32,208 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:32,208 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:32,209 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:16:32,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:32,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2477. [2020-11-11 15:16:32,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 2.7164781906300486) internal successors, (6726), 2476 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 6726 transitions. [2020-11-11 15:16:32,265 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 6726 transitions. Word has length 116 [2020-11-11 15:16:32,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:32,265 INFO L481 AbstractCegarLoop]: Abstraction has 2477 states and 6726 transitions. [2020-11-11 15:16:32,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 6726 transitions. [2020-11-11 15:16:32,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:32,267 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:32,267 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:32,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-11-11 15:16:32,468 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:32,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:32,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1932492359, now seen corresponding path program 156 times [2020-11-11 15:16:32,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:32,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415055202] [2020-11-11 15:16:32,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:33,064 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:33,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415055202] [2020-11-11 15:16:33,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890977292] [2020-11-11 15:16:33,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:33,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:16:33,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:33,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:33,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:33,224 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:33,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:33,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:33,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:16:33,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280253042] [2020-11-11 15:16:33,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:16:33,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:33,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:16:33,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:16:33,297 INFO L87 Difference]: Start difference. First operand 2477 states and 6726 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:35,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:35,155 INFO L93 Difference]: Finished difference Result 3820 states and 9590 transitions. [2020-11-11 15:16:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:16:35,156 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-11 15:16:35,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:35,162 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:35,162 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:35,162 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:16:35,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:35,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2527. [2020-11-11 15:16:35,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2527 states, 2526 states have (on average 2.7220902612826605) internal successors, (6876), 2526 states have internal predecessors, (6876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:35,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2527 states to 2527 states and 6876 transitions. [2020-11-11 15:16:35,215 INFO L78 Accepts]: Start accepts. Automaton has 2527 states and 6876 transitions. Word has length 116 [2020-11-11 15:16:35,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:35,215 INFO L481 AbstractCegarLoop]: Abstraction has 2527 states and 6876 transitions. [2020-11-11 15:16:35,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:35,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2527 states and 6876 transitions. [2020-11-11 15:16:35,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:35,219 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:35,219 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:35,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:35,420 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:35,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:35,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1494528277, now seen corresponding path program 157 times [2020-11-11 15:16:35,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:35,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055119891] [2020-11-11 15:16:35,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:35,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055119891] [2020-11-11 15:16:35,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459055882] [2020-11-11 15:16:35,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:36,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:36,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:36,101 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:36,118 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:36,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:36,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:16:36,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314496275] [2020-11-11 15:16:36,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:16:36,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:36,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:16:36,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:16:36,119 INFO L87 Difference]: Start difference. First operand 2527 states and 6876 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:37,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:37,840 INFO L93 Difference]: Finished difference Result 3820 states and 9640 transitions. [2020-11-11 15:16:37,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:16:37,842 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-11 15:16:37,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:37,848 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:37,849 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:37,849 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=636, Invalid=2016, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:16:37,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:37,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2577. [2020-11-11 15:16:37,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2576 states have (on average 2.7274844720496896) internal successors, (7026), 2576 states have internal predecessors, (7026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:37,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 7026 transitions. [2020-11-11 15:16:37,910 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 7026 transitions. Word has length 116 [2020-11-11 15:16:37,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:37,910 INFO L481 AbstractCegarLoop]: Abstraction has 2577 states and 7026 transitions. [2020-11-11 15:16:37,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:37,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 7026 transitions. [2020-11-11 15:16:37,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:37,914 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:37,914 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:38,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-11-11 15:16:38,115 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:38,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:38,116 INFO L82 PathProgramCache]: Analyzing trace with hash -50764283, now seen corresponding path program 158 times [2020-11-11 15:16:38,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:38,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110992005] [2020-11-11 15:16:38,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:38,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110992005] [2020-11-11 15:16:38,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382481285] [2020-11-11 15:16:38,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:38,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:16:38,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:38,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:38,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:39,060 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:39,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:39,140 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:39,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:39,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:16:39,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998576937] [2020-11-11 15:16:39,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:16:39,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:39,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:16:39,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:16:39,143 INFO L87 Difference]: Start difference. First operand 2577 states and 7026 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:41,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:41,354 INFO L93 Difference]: Finished difference Result 3820 states and 9690 transitions. [2020-11-11 15:16:41,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:16:41,356 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-11 15:16:41,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:41,362 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:41,363 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:41,363 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=731, Invalid=2349, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:16:41,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:41,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2627. [2020-11-11 15:16:41,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 2.732673267326733) internal successors, (7176), 2626 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:41,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 7176 transitions. [2020-11-11 15:16:41,420 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 7176 transitions. Word has length 116 [2020-11-11 15:16:41,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:41,420 INFO L481 AbstractCegarLoop]: Abstraction has 2627 states and 7176 transitions. [2020-11-11 15:16:41,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:41,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 7176 transitions. [2020-11-11 15:16:41,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:41,424 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:41,424 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:41,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-11-11 15:16:41,626 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:41,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:41,627 INFO L82 PathProgramCache]: Analyzing trace with hash -617930157, now seen corresponding path program 159 times [2020-11-11 15:16:41,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:41,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567044612] [2020-11-11 15:16:41,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:42,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567044612] [2020-11-11 15:16:42,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443328144] [2020-11-11 15:16:42,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:42,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:16:42,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:42,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:42,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:42,305 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:42,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:42,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:16:42,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409052153] [2020-11-11 15:16:42,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:16:42,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:42,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:16:42,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:16:42,325 INFO L87 Difference]: Start difference. First operand 2627 states and 7176 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:44,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:44,013 INFO L93 Difference]: Finished difference Result 3820 states and 9740 transitions. [2020-11-11 15:16:44,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:16:44,015 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-11 15:16:44,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:44,023 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:44,024 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:44,024 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=707, Invalid=2155, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:16:44,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:44,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2677. [2020-11-11 15:16:44,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2677 states, 2676 states have (on average 2.7376681614349776) internal successors, (7326), 2676 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:44,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2677 states to 2677 states and 7326 transitions. [2020-11-11 15:16:44,087 INFO L78 Accepts]: Start accepts. Automaton has 2677 states and 7326 transitions. Word has length 116 [2020-11-11 15:16:44,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:44,087 INFO L481 AbstractCegarLoop]: Abstraction has 2677 states and 7326 transitions. [2020-11-11 15:16:44,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:44,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2677 states and 7326 transitions. [2020-11-11 15:16:44,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:44,091 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:44,092 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:44,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:44,293 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:44,293 INFO L82 PathProgramCache]: Analyzing trace with hash 210780995, now seen corresponding path program 160 times [2020-11-11 15:16:44,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:44,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399085217] [2020-11-11 15:16:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:44,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399085217] [2020-11-11 15:16:44,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675434078] [2020-11-11 15:16:44,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:44,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:16:44,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:44,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:16:44,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:45,039 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:45,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:45,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:45,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:16:45,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144939204] [2020-11-11 15:16:45,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:16:45,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:45,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:16:45,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:16:45,089 INFO L87 Difference]: Start difference. First operand 2677 states and 7326 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:47,447 INFO L93 Difference]: Finished difference Result 3820 states and 9790 transitions. [2020-11-11 15:16:47,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:16:47,448 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-11 15:16:47,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:47,455 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:47,455 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:47,455 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=810, Invalid=2496, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:16:47,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:47,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2727. [2020-11-11 15:16:47,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 2.7424798239178285) internal successors, (7476), 2726 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:47,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 7476 transitions. [2020-11-11 15:16:47,515 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 7476 transitions. Word has length 116 [2020-11-11 15:16:47,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:47,515 INFO L481 AbstractCegarLoop]: Abstraction has 2727 states and 7476 transitions. [2020-11-11 15:16:47,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:47,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 7476 transitions. [2020-11-11 15:16:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:47,518 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:47,518 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:47,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:47,719 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:47,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:47,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1511757551, now seen corresponding path program 161 times [2020-11-11 15:16:47,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:47,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179587819] [2020-11-11 15:16:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:48,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179587819] [2020-11-11 15:16:48,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230812192] [2020-11-11 15:16:48,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:48,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:16:48,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:48,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:48,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:48,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:48,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:48,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:16:48,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58833798] [2020-11-11 15:16:48,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:16:48,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:48,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:16:48,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:16:48,455 INFO L87 Difference]: Start difference. First operand 2727 states and 7476 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:50,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:50,368 INFO L93 Difference]: Finished difference Result 3820 states and 9840 transitions. [2020-11-11 15:16:50,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:16:50,370 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-11 15:16:50,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:50,377 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:50,378 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:50,378 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=794, Invalid=2286, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:16:50,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:50,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2777. [2020-11-11 15:16:50,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2777 states, 2776 states have (on average 2.7471181556195967) internal successors, (7626), 2776 states have internal predecessors, (7626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 7626 transitions. [2020-11-11 15:16:50,439 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 7626 transitions. Word has length 116 [2020-11-11 15:16:50,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:50,439 INFO L481 AbstractCegarLoop]: Abstraction has 2777 states and 7626 transitions. [2020-11-11 15:16:50,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:50,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 7626 transitions. [2020-11-11 15:16:50,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:50,443 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:50,444 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:50,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-11-11 15:16:50,660 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:50,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:50,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1243674113, now seen corresponding path program 162 times [2020-11-11 15:16:50,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:50,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603552681] [2020-11-11 15:16:50,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:51,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603552681] [2020-11-11 15:16:51,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217371969] [2020-11-11 15:16:51,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:51,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:16:51,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:51,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:51,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:51,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:51,500 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:51,515 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:51,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:51,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:16:51,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281113867] [2020-11-11 15:16:51,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:16:51,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:51,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:16:51,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:16:51,516 INFO L87 Difference]: Start difference. First operand 2777 states and 7626 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:54,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:54,110 INFO L93 Difference]: Finished difference Result 3820 states and 9890 transitions. [2020-11-11 15:16:54,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:16:54,111 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-11 15:16:54,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:54,117 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:54,117 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:54,118 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:16:54,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:54,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2827. [2020-11-11 15:16:54,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2826 states have (on average 2.751592356687898) internal successors, (7776), 2826 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:54,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 7776 transitions. [2020-11-11 15:16:54,180 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 7776 transitions. Word has length 116 [2020-11-11 15:16:54,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:54,180 INFO L481 AbstractCegarLoop]: Abstraction has 2827 states and 7776 transitions. [2020-11-11 15:16:54,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:54,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 7776 transitions. [2020-11-11 15:16:54,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:54,185 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:54,185 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:54,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:54,386 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:54,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:54,387 INFO L82 PathProgramCache]: Analyzing trace with hash -112892593, now seen corresponding path program 163 times [2020-11-11 15:16:54,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:54,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949333419] [2020-11-11 15:16:54,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:55,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949333419] [2020-11-11 15:16:55,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803846998] [2020-11-11 15:16:55,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:55,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:55,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:55,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:55,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:55,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:16:55,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528541444] [2020-11-11 15:16:55,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:16:55,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:55,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:16:55,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:16:55,198 INFO L87 Difference]: Start difference. First operand 2827 states and 7776 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:57,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:57,305 INFO L93 Difference]: Finished difference Result 3820 states and 9940 transitions. [2020-11-11 15:16:57,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:16:57,307 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-11 15:16:57,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:57,314 INFO L225 Difference]: With dead ends: 3820 [2020-11-11 15:16:57,314 INFO L226 Difference]: Without dead ends: 3550 [2020-11-11 15:16:57,314 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:16:57,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-11-11 15:16:57,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2877. [2020-11-11 15:16:57,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2877 states, 2876 states have (on average 2.755910987482615) internal successors, (7926), 2876 states have internal predecessors, (7926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 7926 transitions. [2020-11-11 15:16:57,374 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 7926 transitions. Word has length 116 [2020-11-11 15:16:57,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:57,375 INFO L481 AbstractCegarLoop]: Abstraction has 2877 states and 7926 transitions. [2020-11-11 15:16:57,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:57,375 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 7926 transitions. [2020-11-11 15:16:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:16:57,379 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:57,379 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:16:57,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:57,580 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:57,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:57,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1718640191, now seen corresponding path program 164 times [2020-11-11 15:16:57,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:57,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700784488] [2020-11-11 15:16:57,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:58,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700784488] [2020-11-11 15:16:58,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503988600] [2020-11-11 15:16:58,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:58,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:16:58,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:58,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:16:58,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:58,308 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:58,342 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:16:58,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:58,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:16:58,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864590824] [2020-11-11 15:16:58,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:16:58,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:58,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:16:58,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:16:58,361 INFO L87 Difference]: Start difference. First operand 2877 states and 7926 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:01,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:01,071 INFO L93 Difference]: Finished difference Result 3865 states and 10110 transitions. [2020-11-11 15:17:01,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 15:17:01,073 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-11 15:17:01,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:01,079 INFO L225 Difference]: With dead ends: 3865 [2020-11-11 15:17:01,079 INFO L226 Difference]: Without dead ends: 3595 [2020-11-11 15:17:01,080 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1016, Invalid=2766, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:17:01,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3595 states. [2020-11-11 15:17:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3595 to 2927. [2020-11-11 15:17:01,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2926 states have (on average 2.7652084757347914) internal successors, (8091), 2926 states have internal predecessors, (8091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:01,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 8091 transitions. [2020-11-11 15:17:01,168 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 8091 transitions. Word has length 116 [2020-11-11 15:17:01,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:01,169 INFO L481 AbstractCegarLoop]: Abstraction has 2927 states and 8091 transitions. [2020-11-11 15:17:01,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:01,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 8091 transitions. [2020-11-11 15:17:01,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:17:01,175 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:01,175 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:17:01,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:01,390 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:01,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:01,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1947535603, now seen corresponding path program 165 times [2020-11-11 15:17:01,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:01,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351601159] [2020-11-11 15:17:01,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:01,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351601159] [2020-11-11 15:17:01,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170611978] [2020-11-11 15:17:01,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:02,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:17:02,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:02,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:17:02,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:02,096 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:02,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:02,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:17:02,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195332329] [2020-11-11 15:17:02,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:17:02,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:02,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:17:02,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:17:02,111 INFO L87 Difference]: Start difference. First operand 2927 states and 8091 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:04,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:04,280 INFO L93 Difference]: Finished difference Result 4952 states and 13244 transitions. [2020-11-11 15:17:04,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:17:04,281 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-11 15:17:04,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:04,288 INFO L225 Difference]: With dead ends: 4952 [2020-11-11 15:17:04,288 INFO L226 Difference]: Without dead ends: 4682 [2020-11-11 15:17:04,288 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1017, Invalid=2523, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:17:04,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4682 states. [2020-11-11 15:17:04,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4682 to 3052. [2020-11-11 15:17:04,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3052 states, 3051 states have (on average 2.780072107505736) internal successors, (8482), 3051 states have internal predecessors, (8482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:04,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 8482 transitions. [2020-11-11 15:17:04,393 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 8482 transitions. Word has length 116 [2020-11-11 15:17:04,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:04,393 INFO L481 AbstractCegarLoop]: Abstraction has 3052 states and 8482 transitions. [2020-11-11 15:17:04,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:04,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 8482 transitions. [2020-11-11 15:17:04,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:17:04,398 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:04,398 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:17:04,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2020-11-11 15:17:04,599 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:04,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:04,600 INFO L82 PathProgramCache]: Analyzing trace with hash -236327649, now seen corresponding path program 166 times [2020-11-11 15:17:04,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:04,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511546201] [2020-11-11 15:17:04,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:05,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511546201] [2020-11-11 15:17:05,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835935202] [2020-11-11 15:17:05,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:05,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:17:05,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:05,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:17:05,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:05,324 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:17:05,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:05,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:05,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:17:05,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386774479] [2020-11-11 15:17:05,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:17:05,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:05,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:17:05,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:17:05,376 INFO L87 Difference]: Start difference. First operand 3052 states and 8482 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:08,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:08,162 INFO L93 Difference]: Finished difference Result 3991 states and 10600 transitions. [2020-11-11 15:17:08,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 15:17:08,164 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-11 15:17:08,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:08,171 INFO L225 Difference]: With dead ends: 3991 [2020-11-11 15:17:08,171 INFO L226 Difference]: Without dead ends: 3580 [2020-11-11 15:17:08,172 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1146, Invalid=2886, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:17:08,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2020-11-11 15:17:08,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 2202. [2020-11-11 15:17:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 2.692412539754657) internal successors, (5926), 2201 states have internal predecessors, (5926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:08,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 5926 transitions. [2020-11-11 15:17:08,222 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 5926 transitions. Word has length 116 [2020-11-11 15:17:08,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:08,222 INFO L481 AbstractCegarLoop]: Abstraction has 2202 states and 5926 transitions. [2020-11-11 15:17:08,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:08,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 5926 transitions. [2020-11-11 15:17:08,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:08,226 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:08,226 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:17:08,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:08,426 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:08,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:08,427 INFO L82 PathProgramCache]: Analyzing trace with hash 392291254, now seen corresponding path program 167 times [2020-11-11 15:17:08,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:08,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268615795] [2020-11-11 15:17:08,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:09,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268615795] [2020-11-11 15:17:09,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244823172] [2020-11-11 15:17:09,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:09,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:17:09,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:09,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:09,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:09,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:09,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:09,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:17:09,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569947287] [2020-11-11 15:17:09,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:17:09,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:09,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:17:09,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:09,386 INFO L87 Difference]: Start difference. First operand 2202 states and 5926 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:10,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:10,793 INFO L93 Difference]: Finished difference Result 3495 states and 8690 transitions. [2020-11-11 15:17:10,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:17:10,795 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-11 15:17:10,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:10,802 INFO L225 Difference]: With dead ends: 3495 [2020-11-11 15:17:10,802 INFO L226 Difference]: Without dead ends: 3225 [2020-11-11 15:17:10,802 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=610, Invalid=1742, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:17:10,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2020-11-11 15:17:10,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2252. [2020-11-11 15:17:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 2251 states have (on average 2.699244780097734) internal successors, (6076), 2251 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:10,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 6076 transitions. [2020-11-11 15:17:10,852 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 6076 transitions. Word has length 121 [2020-11-11 15:17:10,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:10,852 INFO L481 AbstractCegarLoop]: Abstraction has 2252 states and 6076 transitions. [2020-11-11 15:17:10,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:10,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 6076 transitions. [2020-11-11 15:17:10,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:10,855 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:10,855 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:17:11,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-11-11 15:17:11,056 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:11,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:11,057 INFO L82 PathProgramCache]: Analyzing trace with hash 2074798246, now seen corresponding path program 168 times [2020-11-11 15:17:11,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:11,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523534090] [2020-11-11 15:17:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:11,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523534090] [2020-11-11 15:17:11,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323520421] [2020-11-11 15:17:11,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:11,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:17:11,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:11,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:11,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:12,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:17:12,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:12,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:12,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:17:12,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033076603] [2020-11-11 15:17:12,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:17:12,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:12,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:17:12,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:17:12,128 INFO L87 Difference]: Start difference. First operand 2252 states and 6076 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:13,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:13,683 INFO L93 Difference]: Finished difference Result 3940 states and 9630 transitions. [2020-11-11 15:17:13,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:17:13,685 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-11 15:17:13,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:13,691 INFO L225 Difference]: With dead ends: 3940 [2020-11-11 15:17:13,691 INFO L226 Difference]: Without dead ends: 3670 [2020-11-11 15:17:13,692 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=665, Invalid=1987, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:17:13,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2020-11-11 15:17:13,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 2302. [2020-11-11 15:17:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2301 states have (on average 2.705780095610604) internal successors, (6226), 2301 states have internal predecessors, (6226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:13,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 6226 transitions. [2020-11-11 15:17:13,747 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 6226 transitions. Word has length 121 [2020-11-11 15:17:13,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:13,747 INFO L481 AbstractCegarLoop]: Abstraction has 2302 states and 6226 transitions. [2020-11-11 15:17:13,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:13,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 6226 transitions. [2020-11-11 15:17:13,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:13,751 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:13,751 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:17:13,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-11-11 15:17:13,952 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:13,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:13,952 INFO L82 PathProgramCache]: Analyzing trace with hash 222150388, now seen corresponding path program 169 times [2020-11-11 15:17:13,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:13,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993092940] [2020-11-11 15:17:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:14,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993092940] [2020-11-11 15:17:14,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237343002] [2020-11-11 15:17:14,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:14,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:14,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:14,881 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:14,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:14,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:17:14,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511478270] [2020-11-11 15:17:14,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:17:14,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:14,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:17:14,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:14,905 INFO L87 Difference]: Start difference. First operand 2302 states and 6226 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:16,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:16,423 INFO L93 Difference]: Finished difference Result 3945 states and 9690 transitions. [2020-11-11 15:17:16,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:17:16,424 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-11 15:17:16,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:16,432 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:16,432 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:16,433 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=663, Invalid=1989, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:17:16,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:16,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2352. [2020-11-11 15:17:16,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.712037430880476) internal successors, (6376), 2351 states have internal predecessors, (6376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 6376 transitions. [2020-11-11 15:17:16,486 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 6376 transitions. Word has length 121 [2020-11-11 15:17:16,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:16,487 INFO L481 AbstractCegarLoop]: Abstraction has 2352 states and 6376 transitions. [2020-11-11 15:17:16,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:16,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 6376 transitions. [2020-11-11 15:17:16,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:16,490 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:16,490 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:17:16,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:16,692 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:16,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:16,692 INFO L82 PathProgramCache]: Analyzing trace with hash 288042980, now seen corresponding path program 170 times [2020-11-11 15:17:16,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:16,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001244829] [2020-11-11 15:17:16,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:17,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001244829] [2020-11-11 15:17:17,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095231948] [2020-11-11 15:17:17,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:17,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:17:17,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:17,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:17,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:17,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:17:17,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:17,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:17,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:17:17,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097739628] [2020-11-11 15:17:17,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:17:17,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:17,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:17:17,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:17:17,698 INFO L87 Difference]: Start difference. First operand 2352 states and 6376 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:19,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:19,577 INFO L93 Difference]: Finished difference Result 3945 states and 9740 transitions. [2020-11-11 15:17:19,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:17:19,579 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-11 15:17:19,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:19,583 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:19,583 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:19,584 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=686, Invalid=2176, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:17:19,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:19,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2402. [2020-11-11 15:17:19,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 2.7180341524364846) internal successors, (6526), 2401 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:19,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 6526 transitions. [2020-11-11 15:17:19,638 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 6526 transitions. Word has length 121 [2020-11-11 15:17:19,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:19,639 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 6526 transitions. [2020-11-11 15:17:19,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:19,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 6526 transitions. [2020-11-11 15:17:19,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:19,642 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:19,642 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:17:19,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-11-11 15:17:19,843 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:19,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:19,844 INFO L82 PathProgramCache]: Analyzing trace with hash 362344370, now seen corresponding path program 171 times [2020-11-11 15:17:19,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:19,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863180956] [2020-11-11 15:17:19,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:20,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863180956] [2020-11-11 15:17:20,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678488425] [2020-11-11 15:17:20,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:20,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:17:20,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:20,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:20,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:20,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:20,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:20,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:17:20,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613837815] [2020-11-11 15:17:20,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:17:20,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:20,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:17:20,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:20,772 INFO L87 Difference]: Start difference. First operand 2402 states and 6526 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:22,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:22,471 INFO L93 Difference]: Finished difference Result 3945 states and 9790 transitions. [2020-11-11 15:17:22,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:17:22,473 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-11 15:17:22,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:22,478 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:22,478 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:22,479 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=698, Invalid=2164, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:17:22,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:22,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2452. [2020-11-11 15:17:22,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 2.7237862097103225) internal successors, (6676), 2451 states have internal predecessors, (6676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:22,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 6676 transitions. [2020-11-11 15:17:22,535 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 6676 transitions. Word has length 121 [2020-11-11 15:17:22,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:22,535 INFO L481 AbstractCegarLoop]: Abstraction has 2452 states and 6676 transitions. [2020-11-11 15:17:22,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:22,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 6676 transitions. [2020-11-11 15:17:22,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:22,539 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:22,539 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:17:22,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:22,740 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:22,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:22,741 INFO L82 PathProgramCache]: Analyzing trace with hash 998362274, now seen corresponding path program 172 times [2020-11-11 15:17:22,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:22,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091723212] [2020-11-11 15:17:22,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:23,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091723212] [2020-11-11 15:17:23,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498339943] [2020-11-11 15:17:23,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:23,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:17:23,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:23,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:17:23,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:23,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:17:23,702 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:23,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:23,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:17:23,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468514545] [2020-11-11 15:17:23,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:17:23,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:23,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:17:23,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:17:23,724 INFO L87 Difference]: Start difference. First operand 2452 states and 6676 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:25,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:25,494 INFO L93 Difference]: Finished difference Result 3945 states and 9840 transitions. [2020-11-11 15:17:25,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:17:25,495 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-11 15:17:25,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:25,502 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:25,502 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:25,503 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=723, Invalid=2357, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:17:25,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:25,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2502. [2020-11-11 15:17:25,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2501 states have (on average 2.7293082766893244) internal successors, (6826), 2501 states have internal predecessors, (6826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:25,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 6826 transitions. [2020-11-11 15:17:25,549 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 6826 transitions. Word has length 121 [2020-11-11 15:17:25,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:25,549 INFO L481 AbstractCegarLoop]: Abstraction has 2502 states and 6826 transitions. [2020-11-11 15:17:25,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:25,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 6826 transitions. [2020-11-11 15:17:25,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:25,552 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:25,552 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:17:25,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2020-11-11 15:17:25,753 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:25,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:25,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1108891120, now seen corresponding path program 173 times [2020-11-11 15:17:25,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:25,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223164253] [2020-11-11 15:17:25,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:26,350 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:26,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223164253] [2020-11-11 15:17:26,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759844455] [2020-11-11 15:17:26,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:26,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:17:26,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:26,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:26,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:26,541 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:26,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:26,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:17:26,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116736935] [2020-11-11 15:17:26,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:17:26,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:26,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:17:26,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:26,562 INFO L87 Difference]: Start difference. First operand 2502 states and 6826 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:28,168 INFO L93 Difference]: Finished difference Result 3945 states and 9890 transitions. [2020-11-11 15:17:28,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:17:28,169 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-11 15:17:28,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:28,175 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:28,176 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:28,176 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=749, Invalid=2331, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:17:28,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:28,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2552. [2020-11-11 15:17:28,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.7346138769110153) internal successors, (6976), 2551 states have internal predecessors, (6976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:28,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 6976 transitions. [2020-11-11 15:17:28,222 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 6976 transitions. Word has length 121 [2020-11-11 15:17:28,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:28,222 INFO L481 AbstractCegarLoop]: Abstraction has 2552 states and 6976 transitions. [2020-11-11 15:17:28,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:28,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 6976 transitions. [2020-11-11 15:17:28,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:28,224 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:28,224 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:17:28,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:28,425 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:28,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1122787616, now seen corresponding path program 174 times [2020-11-11 15:17:28,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:28,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259578770] [2020-11-11 15:17:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:29,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259578770] [2020-11-11 15:17:29,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205436415] [2020-11-11 15:17:29,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:29,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:17:29,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:29,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:29,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:29,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:17:29,289 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:29,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:29,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:17:29,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635519735] [2020-11-11 15:17:29,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:17:29,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:29,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:17:29,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:17:29,311 INFO L87 Difference]: Start difference. First operand 2552 states and 6976 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:31,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:31,297 INFO L93 Difference]: Finished difference Result 3945 states and 9940 transitions. [2020-11-11 15:17:31,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:17:31,300 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-11 15:17:31,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:31,307 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:31,308 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:31,308 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=776, Invalid=2530, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:17:31,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:31,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2602. [2020-11-11 15:17:31,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2602 states, 2601 states have (on average 2.7397154940407535) internal successors, (7126), 2601 states have internal predecessors, (7126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:31,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 7126 transitions. [2020-11-11 15:17:31,371 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 7126 transitions. Word has length 121 [2020-11-11 15:17:31,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:31,372 INFO L481 AbstractCegarLoop]: Abstraction has 2602 states and 7126 transitions. [2020-11-11 15:17:31,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:31,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 7126 transitions. [2020-11-11 15:17:31,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:31,376 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:31,376 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:17:31,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:31,577 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:31,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:31,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1560751698, now seen corresponding path program 175 times [2020-11-11 15:17:31,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:31,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152245749] [2020-11-11 15:17:31,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:32,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152245749] [2020-11-11 15:17:32,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532590755] [2020-11-11 15:17:32,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:32,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:32,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:32,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:32,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:32,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:17:32,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515984429] [2020-11-11 15:17:32,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:17:32,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:32,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:17:32,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:32,424 INFO L87 Difference]: Start difference. First operand 2602 states and 7126 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:34,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:34,155 INFO L93 Difference]: Finished difference Result 3945 states and 9990 transitions. [2020-11-11 15:17:34,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:17:34,157 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-11 15:17:34,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:34,164 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:34,165 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:34,165 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=816, Invalid=2490, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:17:34,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:34,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2652. [2020-11-11 15:17:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 2.7446246699358734) internal successors, (7276), 2651 states have internal predecessors, (7276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:34,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 7276 transitions. [2020-11-11 15:17:34,224 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 7276 transitions. Word has length 121 [2020-11-11 15:17:34,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:34,224 INFO L481 AbstractCegarLoop]: Abstraction has 2652 states and 7276 transitions. [2020-11-11 15:17:34,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:34,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 7276 transitions. [2020-11-11 15:17:34,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:34,227 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:34,228 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:17:34,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:34,429 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:34,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:34,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1188923038, now seen corresponding path program 176 times [2020-11-11 15:17:34,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:34,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612116383] [2020-11-11 15:17:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:35,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612116383] [2020-11-11 15:17:35,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486322001] [2020-11-11 15:17:35,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:35,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:17:35,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:35,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:35,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:35,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:17:35,406 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:35,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:35,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:17:35,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663381679] [2020-11-11 15:17:35,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:17:35,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:35,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:17:35,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:17:35,427 INFO L87 Difference]: Start difference. First operand 2652 states and 7276 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:37,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:37,858 INFO L93 Difference]: Finished difference Result 3945 states and 10040 transitions. [2020-11-11 15:17:37,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:17:37,860 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-11 15:17:37,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:37,866 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:37,866 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:37,866 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=845, Invalid=2695, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:17:37,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:37,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2702. [2020-11-11 15:17:37,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2702 states, 2701 states have (on average 2.7493520918178453) internal successors, (7426), 2701 states have internal predecessors, (7426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:37,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2702 states to 2702 states and 7426 transitions. [2020-11-11 15:17:37,916 INFO L78 Accepts]: Start accepts. Automaton has 2702 states and 7426 transitions. Word has length 121 [2020-11-11 15:17:37,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:37,917 INFO L481 AbstractCegarLoop]: Abstraction has 2702 states and 7426 transitions. [2020-11-11 15:17:37,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:37,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2702 states and 7426 transitions. [2020-11-11 15:17:37,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:37,920 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:37,920 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:17:38,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:38,121 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:38,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:38,121 INFO L82 PathProgramCache]: Analyzing trace with hash 621757164, now seen corresponding path program 177 times [2020-11-11 15:17:38,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:38,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020357213] [2020-11-11 15:17:38,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:38,660 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:38,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020357213] [2020-11-11 15:17:38,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749815115] [2020-11-11 15:17:38,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:38,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:17:38,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:38,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:38,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:38,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:38,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:38,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:17:38,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033124942] [2020-11-11 15:17:38,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:17:38,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:38,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:17:38,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:38,855 INFO L87 Difference]: Start difference. First operand 2702 states and 7426 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:40,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:40,675 INFO L93 Difference]: Finished difference Result 3945 states and 10090 transitions. [2020-11-11 15:17:40,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:17:40,677 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-11 15:17:40,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:40,683 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:40,683 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:40,683 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=899, Invalid=2641, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:17:40,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:40,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2752. [2020-11-11 15:17:40,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2751 states have (on average 2.7539076699382044) internal successors, (7576), 2751 states have internal predecessors, (7576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 7576 transitions. [2020-11-11 15:17:40,732 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 7576 transitions. Word has length 121 [2020-11-11 15:17:40,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:40,732 INFO L481 AbstractCegarLoop]: Abstraction has 2752 states and 7576 transitions. [2020-11-11 15:17:40,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:40,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 7576 transitions. [2020-11-11 15:17:40,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:40,735 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:40,735 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:17:40,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-11-11 15:17:40,936 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:40,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:40,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1450468316, now seen corresponding path program 178 times [2020-11-11 15:17:40,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:40,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704210255] [2020-11-11 15:17:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:41,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704210255] [2020-11-11 15:17:41,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943250216] [2020-11-11 15:17:41,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:41,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:17:41,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:41,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:17:41,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:41,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:17:41,853 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:41,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:41,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:17:41,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902011404] [2020-11-11 15:17:41,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:17:41,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:41,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:17:41,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:17:41,888 INFO L87 Difference]: Start difference. First operand 2752 states and 7576 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:44,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:44,265 INFO L93 Difference]: Finished difference Result 3945 states and 10140 transitions. [2020-11-11 15:17:44,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:17:44,267 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-11 15:17:44,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:44,274 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:44,274 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:44,274 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=930, Invalid=2852, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:17:44,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:44,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2802. [2020-11-11 15:17:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2801 states have (on average 2.758300606926098) internal successors, (7726), 2801 states have internal predecessors, (7726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:44,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 7726 transitions. [2020-11-11 15:17:44,324 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 7726 transitions. Word has length 121 [2020-11-11 15:17:44,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:44,324 INFO L481 AbstractCegarLoop]: Abstraction has 2802 states and 7726 transitions. [2020-11-11 15:17:44,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:44,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 7726 transitions. [2020-11-11 15:17:44,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:44,328 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:44,328 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:17:44,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-11-11 15:17:44,528 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:44,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:44,529 INFO L82 PathProgramCache]: Analyzing trace with hash -272070230, now seen corresponding path program 179 times [2020-11-11 15:17:44,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:44,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485332964] [2020-11-11 15:17:44,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:45,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485332964] [2020-11-11 15:17:45,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962337075] [2020-11-11 15:17:45,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:45,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:17:45,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:45,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:45,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:45,252 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:45,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:45,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:17:45,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528313382] [2020-11-11 15:17:45,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:17:45,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:45,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:17:45,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:45,268 INFO L87 Difference]: Start difference. First operand 2802 states and 7726 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:47,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:47,433 INFO L93 Difference]: Finished difference Result 3945 states and 10190 transitions. [2020-11-11 15:17:47,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:17:47,435 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-11 15:17:47,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:47,439 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:47,440 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:47,440 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=998, Invalid=2784, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:17:47,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:47,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2852. [2020-11-11 15:17:47,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2851 states have (on average 2.7625394598386532) internal successors, (7876), 2851 states have internal predecessors, (7876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:47,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 7876 transitions. [2020-11-11 15:17:47,488 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 7876 transitions. Word has length 121 [2020-11-11 15:17:47,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:47,488 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 7876 transitions. [2020-11-11 15:17:47,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:47,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 7876 transitions. [2020-11-11 15:17:47,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:47,491 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:47,491 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:17:47,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-11-11 15:17:47,695 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:47,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:47,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1811605862, now seen corresponding path program 180 times [2020-11-11 15:17:47,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:47,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222878098] [2020-11-11 15:17:47,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:48,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222878098] [2020-11-11 15:17:48,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125089154] [2020-11-11 15:17:48,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:48,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:17:48,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:48,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:48,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:48,613 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:17:48,697 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:48,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:48,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:17:48,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111497887] [2020-11-11 15:17:48,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:17:48,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:48,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:17:48,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:17:48,715 INFO L87 Difference]: Start difference. First operand 2852 states and 7876 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:51,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:51,495 INFO L93 Difference]: Finished difference Result 3945 states and 10240 transitions. [2020-11-11 15:17:51,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 15:17:51,497 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-11 15:17:51,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:51,505 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:51,505 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:51,506 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1031, Invalid=3001, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:17:51,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:51,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2902. [2020-11-11 15:17:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2901 states have (on average 2.7666321957945534) internal successors, (8026), 2901 states have internal predecessors, (8026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:51,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 8026 transitions. [2020-11-11 15:17:51,571 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 8026 transitions. Word has length 121 [2020-11-11 15:17:51,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:51,572 INFO L481 AbstractCegarLoop]: Abstraction has 2902 states and 8026 transitions. [2020-11-11 15:17:51,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:51,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 8026 transitions. [2020-11-11 15:17:51,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:51,578 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:51,578 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:17:51,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:51,789 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:51,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:51,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1126794728, now seen corresponding path program 181 times [2020-11-11 15:17:51,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:51,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989974559] [2020-11-11 15:17:51,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:52,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989974559] [2020-11-11 15:17:52,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067450844] [2020-11-11 15:17:52,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:52,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:52,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:52,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:52,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:52,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:17:52,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731146196] [2020-11-11 15:17:52,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:17:52,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:52,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:17:52,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:52,680 INFO L87 Difference]: Start difference. First operand 2902 states and 8026 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:55,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:55,104 INFO L93 Difference]: Finished difference Result 3945 states and 10290 transitions. [2020-11-11 15:17:55,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 15:17:55,105 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-11 15:17:55,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:55,113 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:17:55,114 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:17:55,115 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1113, Invalid=2919, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:17:55,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:17:55,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2952. [2020-11-11 15:17:55,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 2.7705862419518805) internal successors, (8176), 2951 states have internal predecessors, (8176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:55,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 8176 transitions. [2020-11-11 15:17:55,185 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 8176 transitions. Word has length 121 [2020-11-11 15:17:55,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:55,185 INFO L481 AbstractCegarLoop]: Abstraction has 2952 states and 8176 transitions. [2020-11-11 15:17:55,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:55,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 8176 transitions. [2020-11-11 15:17:55,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:55,190 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:55,190 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:17:55,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:55,391 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:55,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:55,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1336639784, now seen corresponding path program 182 times [2020-11-11 15:17:55,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:55,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774822794] [2020-11-11 15:17:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:56,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774822794] [2020-11-11 15:17:56,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043390757] [2020-11-11 15:17:56,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:56,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:17:56,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:56,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:17:56,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:56,346 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:17:56,452 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:56,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:56,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:17:56,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923876672] [2020-11-11 15:17:56,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:17:56,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:56,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:17:56,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:17:56,514 INFO L87 Difference]: Start difference. First operand 2952 states and 8176 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:59,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:59,731 INFO L93 Difference]: Finished difference Result 3990 states and 10460 transitions. [2020-11-11 15:17:59,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-11 15:17:59,733 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-11 15:17:59,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:59,740 INFO L225 Difference]: With dead ends: 3990 [2020-11-11 15:17:59,740 INFO L226 Difference]: Without dead ends: 3720 [2020-11-11 15:17:59,741 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1148, Invalid=3142, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:17:59,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2020-11-11 15:17:59,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 3002. [2020-11-11 15:17:59,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 2.7794068643785406) internal successors, (8341), 3001 states have internal predecessors, (8341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:59,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 8341 transitions. [2020-11-11 15:17:59,805 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 8341 transitions. Word has length 121 [2020-11-11 15:17:59,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:59,806 INFO L481 AbstractCegarLoop]: Abstraction has 3002 states and 8341 transitions. [2020-11-11 15:17:59,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:59,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 8341 transitions. [2020-11-11 15:17:59,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:17:59,809 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:59,809 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:18:00,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-11-11 15:18:00,010 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:00,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:00,011 INFO L82 PathProgramCache]: Analyzing trace with hash -707848282, now seen corresponding path program 183 times [2020-11-11 15:18:00,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:00,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637992458] [2020-11-11 15:18:00,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:00,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637992458] [2020-11-11 15:18:00,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951032190] [2020-11-11 15:18:00,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:00,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:18:00,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:00,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:18:00,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:00,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:00,880 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:00,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:00,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:18:00,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020041639] [2020-11-11 15:18:00,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:18:00,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:00,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:18:00,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:18:00,882 INFO L87 Difference]: Start difference. First operand 3002 states and 8341 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:03,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:03,409 INFO L93 Difference]: Finished difference Result 5052 states and 13544 transitions. [2020-11-11 15:18:03,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 15:18:03,411 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-11 15:18:03,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:03,420 INFO L225 Difference]: With dead ends: 5052 [2020-11-11 15:18:03,420 INFO L226 Difference]: Without dead ends: 4782 [2020-11-11 15:18:03,420 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1245, Invalid=3045, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:18:03,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4782 states. [2020-11-11 15:18:03,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4782 to 3127. [2020-11-11 15:18:03,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3127 states, 3126 states have (on average 2.7933461292386434) internal successors, (8732), 3126 states have internal predecessors, (8732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:03,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3127 states to 3127 states and 8732 transitions. [2020-11-11 15:18:03,490 INFO L78 Accepts]: Start accepts. Automaton has 3127 states and 8732 transitions. Word has length 121 [2020-11-11 15:18:03,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:03,490 INFO L481 AbstractCegarLoop]: Abstraction has 3127 states and 8732 transitions. [2020-11-11 15:18:03,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:03,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3127 states and 8732 transitions. [2020-11-11 15:18:03,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:18:03,493 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:03,493 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:18:03,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:03,694 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:03,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:03,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1003359672, now seen corresponding path program 184 times [2020-11-11 15:18:03,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:03,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497074210] [2020-11-11 15:18:03,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:04,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497074210] [2020-11-11 15:18:04,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860604740] [2020-11-11 15:18:04,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:04,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:18:04,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:04,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:18:04,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:04,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:18:04,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:04,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:04,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:18:04,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854788075] [2020-11-11 15:18:04,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:18:04,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:04,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:18:04,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:18:04,614 INFO L87 Difference]: Start difference. First operand 3127 states and 8732 transitions. Second operand has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:07,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:07,901 INFO L93 Difference]: Finished difference Result 4447 states and 11790 transitions. [2020-11-11 15:18:07,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-11 15:18:07,902 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-11 15:18:07,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:07,910 INFO L225 Difference]: With dead ends: 4447 [2020-11-11 15:18:07,910 INFO L226 Difference]: Without dead ends: 3920 [2020-11-11 15:18:07,911 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1326, Invalid=3644, Unknown=0, NotChecked=0, Total=4970 [2020-11-11 15:18:07,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3920 states. [2020-11-11 15:18:07,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3920 to 3137. [2020-11-11 15:18:07,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3137 states, 3136 states have (on average 2.7857142857142856) internal successors, (8736), 3136 states have internal predecessors, (8736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 8736 transitions. [2020-11-11 15:18:07,976 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 8736 transitions. Word has length 121 [2020-11-11 15:18:07,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:07,977 INFO L481 AbstractCegarLoop]: Abstraction has 3137 states and 8736 transitions. [2020-11-11 15:18:07,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:07,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 8736 transitions. [2020-11-11 15:18:07,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:07,981 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:07,981 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:18:08,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:08,189 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:08,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:08,189 INFO L82 PathProgramCache]: Analyzing trace with hash 473182784, now seen corresponding path program 185 times [2020-11-11 15:18:08,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:08,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512397420] [2020-11-11 15:18:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:09,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512397420] [2020-11-11 15:18:09,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434350247] [2020-11-11 15:18:09,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:09,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-11 15:18:09,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:09,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:18:09,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:09,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:09,510 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:09,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:09,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:18:09,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336472930] [2020-11-11 15:18:09,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:18:09,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:09,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:18:09,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:18:09,583 INFO L87 Difference]: Start difference. First operand 3137 states and 8736 transitions. Second operand has 28 states, 28 states have (on average 5.214285714285714) internal successors, (146), 28 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:11,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:11,138 INFO L93 Difference]: Finished difference Result 4405 states and 11720 transitions. [2020-11-11 15:18:11,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:18:11,139 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.214285714285714) internal successors, (146), 28 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:18:11,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:11,147 INFO L225 Difference]: With dead ends: 4405 [2020-11-11 15:18:11,147 INFO L226 Difference]: Without dead ends: 4071 [2020-11-11 15:18:11,147 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=760, Invalid=2102, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:18:11,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2020-11-11 15:18:11,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 3222. [2020-11-11 15:18:11,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3222 states, 3221 states have (on average 2.7649798199316984) internal successors, (8906), 3221 states have internal predecessors, (8906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:11,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3222 states to 3222 states and 8906 transitions. [2020-11-11 15:18:11,211 INFO L78 Accepts]: Start accepts. Automaton has 3222 states and 8906 transitions. Word has length 126 [2020-11-11 15:18:11,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:11,212 INFO L481 AbstractCegarLoop]: Abstraction has 3222 states and 8906 transitions. [2020-11-11 15:18:11,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.214285714285714) internal successors, (146), 28 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:11,212 INFO L276 IsEmpty]: Start isEmpty. Operand 3222 states and 8906 transitions. [2020-11-11 15:18:11,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:11,216 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:11,216 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:18:11,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:11,417 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:11,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:11,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1810129262, now seen corresponding path program 186 times [2020-11-11 15:18:11,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:11,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839387887] [2020-11-11 15:18:11,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:12,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839387887] [2020-11-11 15:18:12,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675290476] [2020-11-11 15:18:12,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:12,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-11 15:18:12,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:12,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:12,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:12,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:12,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:12,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:18:12,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225787489] [2020-11-11 15:18:12,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:18:12,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:12,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:18:12,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:18:12,431 INFO L87 Difference]: Start difference. First operand 3222 states and 8906 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:13,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:13,689 INFO L93 Difference]: Finished difference Result 5070 states and 12730 transitions. [2020-11-11 15:18:13,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:18:13,690 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:18:13,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:13,697 INFO L225 Difference]: With dead ends: 5070 [2020-11-11 15:18:13,698 INFO L226 Difference]: Without dead ends: 4800 [2020-11-11 15:18:13,698 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=616, Invalid=1640, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:18:13,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4800 states. [2020-11-11 15:18:13,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4800 to 3237. [2020-11-11 15:18:13,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:13,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:18:13,754 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:18:13,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:13,754 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:18:13,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:13,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:18:13,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:13,757 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:13,757 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:18:13,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:13,958 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:13,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:13,958 INFO L82 PathProgramCache]: Analyzing trace with hash -232785314, now seen corresponding path program 187 times [2020-11-11 15:18:13,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:13,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39909516] [2020-11-11 15:18:13,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:14,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39909516] [2020-11-11 15:18:14,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115410128] [2020-11-11 15:18:14,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:14,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:14,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:14,987 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:18:15,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:15,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:15,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:18:15,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525664608] [2020-11-11 15:18:15,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:18:15,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:15,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:18:15,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:18:15,037 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:16,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:16,751 INFO L93 Difference]: Finished difference Result 4955 states and 12500 transitions. [2020-11-11 15:18:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:18:16,753 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:18:16,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:16,758 INFO L225 Difference]: With dead ends: 4955 [2020-11-11 15:18:16,758 INFO L226 Difference]: Without dead ends: 4685 [2020-11-11 15:18:16,759 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=683, Invalid=1969, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:18:16,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4685 states. [2020-11-11 15:18:16,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4685 to 3237. [2020-11-11 15:18:16,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:16,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:18:16,823 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:18:16,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:16,824 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:18:16,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:16,824 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:18:16,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:16,828 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:16,829 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:18:17,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:17,030 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:17,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:17,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1068644564, now seen corresponding path program 188 times [2020-11-11 15:18:17,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:17,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464248030] [2020-11-11 15:18:17,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:17,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464248030] [2020-11-11 15:18:17,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212473777] [2020-11-11 15:18:17,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:17,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:18:17,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:17,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:17,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:17,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:18,018 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:18,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:18,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:18:18,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783889454] [2020-11-11 15:18:18,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:18:18,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:18,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:18:18,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:18:18,020 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:19,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:19,618 INFO L93 Difference]: Finished difference Result 4930 states and 12450 transitions. [2020-11-11 15:18:19,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:18:19,620 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:18:19,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:19,631 INFO L225 Difference]: With dead ends: 4930 [2020-11-11 15:18:19,631 INFO L226 Difference]: Without dead ends: 4660 [2020-11-11 15:18:19,632 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:18:19,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4660 states. [2020-11-11 15:18:19,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4660 to 3237. [2020-11-11 15:18:19,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:18:19,702 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:18:19,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:19,703 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:18:19,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:19,703 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:18:19,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:19,707 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:19,707 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:18:19,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-11-11 15:18:19,908 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:19,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:19,909 INFO L82 PathProgramCache]: Analyzing trace with hash 613862428, now seen corresponding path program 189 times [2020-11-11 15:18:19,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:19,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426018126] [2020-11-11 15:18:19,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:20,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426018126] [2020-11-11 15:18:20,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640556464] [2020-11-11 15:18:20,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:20,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-11 15:18:20,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:20,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:20,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:21,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:18:21,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:21,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:21,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:18:21,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677279405] [2020-11-11 15:18:21,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:18:21,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:21,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:18:21,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:18:21,085 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:23,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:23,022 INFO L93 Difference]: Finished difference Result 4880 states and 12350 transitions. [2020-11-11 15:18:23,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:18:23,025 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:18:23,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:23,032 INFO L225 Difference]: With dead ends: 4880 [2020-11-11 15:18:23,032 INFO L226 Difference]: Without dead ends: 4610 [2020-11-11 15:18:23,033 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=696, Invalid=2166, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:18:23,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2020-11-11 15:18:23,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 3237. [2020-11-11 15:18:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:23,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:18:23,099 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:18:23,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:23,099 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:18:23,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:18:23,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:23,103 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:23,104 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:18:23,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-11-11 15:18:23,304 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:23,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:23,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1238785430, now seen corresponding path program 190 times [2020-11-11 15:18:23,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:23,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246675606] [2020-11-11 15:18:23,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:24,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246675606] [2020-11-11 15:18:24,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594923490] [2020-11-11 15:18:24,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:24,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:18:24,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:24,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:18:24,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:24,160 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:24,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:24,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:18:24,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563250373] [2020-11-11 15:18:24,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:18:24,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:24,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:18:24,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:18:24,183 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:25,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:25,855 INFO L93 Difference]: Finished difference Result 4830 states and 12250 transitions. [2020-11-11 15:18:25,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:18:25,857 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:18:25,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:25,865 INFO L225 Difference]: With dead ends: 4830 [2020-11-11 15:18:25,866 INFO L226 Difference]: Without dead ends: 4560 [2020-11-11 15:18:25,866 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=642, Invalid=2010, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:18:25,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4560 states. [2020-11-11 15:18:25,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4560 to 3237. [2020-11-11 15:18:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:25,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:18:25,928 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:18:25,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:25,928 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:18:25,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:25,928 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:18:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:25,932 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:25,932 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:18:26,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-11-11 15:18:26,133 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:26,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:26,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1172892838, now seen corresponding path program 191 times [2020-11-11 15:18:26,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:26,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298626595] [2020-11-11 15:18:26,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:26,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298626595] [2020-11-11 15:18:26,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620871039] [2020-11-11 15:18:26,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:26,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-11 15:18:26,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:26,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:26,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:27,056 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:18:27,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:27,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:27,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:18:27,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111382746] [2020-11-11 15:18:27,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:18:27,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:27,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:18:27,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:18:27,103 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:29,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:29,148 INFO L93 Difference]: Finished difference Result 4780 states and 12150 transitions. [2020-11-11 15:18:29,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:18:29,150 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:18:29,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:29,160 INFO L225 Difference]: With dead ends: 4780 [2020-11-11 15:18:29,161 INFO L226 Difference]: Without dead ends: 4510 [2020-11-11 15:18:29,161 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:18:29,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2020-11-11 15:18:29,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 3237. [2020-11-11 15:18:29,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:29,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:18:29,237 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:18:29,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:29,238 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:18:29,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:29,238 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:18:29,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:29,242 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:29,242 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:18:29,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-11-11 15:18:29,443 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:29,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:29,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1098591448, now seen corresponding path program 192 times [2020-11-11 15:18:29,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:29,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064046066] [2020-11-11 15:18:29,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:30,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064046066] [2020-11-11 15:18:30,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926671913] [2020-11-11 15:18:30,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:30,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-11 15:18:30,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:30,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:30,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:30,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:30,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:30,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:18:30,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985584933] [2020-11-11 15:18:30,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:18:30,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:30,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:18:30,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:18:30,320 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:32,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:32,085 INFO L93 Difference]: Finished difference Result 4730 states and 12050 transitions. [2020-11-11 15:18:32,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:18:32,087 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:18:32,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:32,094 INFO L225 Difference]: With dead ends: 4730 [2020-11-11 15:18:32,094 INFO L226 Difference]: Without dead ends: 4460 [2020-11-11 15:18:32,095 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=679, Invalid=2183, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:18:32,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2020-11-11 15:18:32,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3237. [2020-11-11 15:18:32,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:32,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:18:32,152 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:18:32,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:32,152 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:18:32,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:32,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:18:32,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:32,155 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:32,155 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:18:32,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-11-11 15:18:32,356 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:32,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:32,357 INFO L82 PathProgramCache]: Analyzing trace with hash -462573544, now seen corresponding path program 193 times [2020-11-11 15:18:32,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:32,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967587264] [2020-11-11 15:18:32,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:33,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967587264] [2020-11-11 15:18:33,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693311633] [2020-11-11 15:18:33,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:33,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:33,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:33,278 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:18:33,308 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:33,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:33,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:18:33,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074214185] [2020-11-11 15:18:33,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:18:33,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:33,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:18:33,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:18:33,336 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:35,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:35,546 INFO L93 Difference]: Finished difference Result 4680 states and 11950 transitions. [2020-11-11 15:18:35,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:18:35,548 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:18:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:35,554 INFO L225 Difference]: With dead ends: 4680 [2020-11-11 15:18:35,554 INFO L226 Difference]: Without dead ends: 4410 [2020-11-11 15:18:35,554 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=770, Invalid=2536, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:18:35,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4410 states. [2020-11-11 15:18:35,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4410 to 3237. [2020-11-11 15:18:35,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:35,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:18:35,606 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:18:35,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:35,607 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:18:35,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:35,607 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:18:35,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:35,609 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:35,610 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:18:35,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:35,810 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:35,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:35,811 INFO L82 PathProgramCache]: Analyzing trace with hash -352044698, now seen corresponding path program 194 times [2020-11-11 15:18:35,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:35,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134810746] [2020-11-11 15:18:35,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:36,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134810746] [2020-11-11 15:18:36,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447371425] [2020-11-11 15:18:36,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:36,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:18:36,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:36,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:36,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:36,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:36,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:36,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:18:36,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584676895] [2020-11-11 15:18:36,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:18:36,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:36,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:18:36,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:18:36,700 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:38,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:38,813 INFO L93 Difference]: Finished difference Result 4630 states and 11850 transitions. [2020-11-11 15:18:38,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:18:38,816 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:18:38,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:38,825 INFO L225 Difference]: With dead ends: 4630 [2020-11-11 15:18:38,825 INFO L226 Difference]: Without dead ends: 4360 [2020-11-11 15:18:38,826 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=732, Invalid=2348, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:18:38,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4360 states. [2020-11-11 15:18:38,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4360 to 3237. [2020-11-11 15:18:38,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:38,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:18:38,889 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:18:38,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:38,889 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:18:38,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:38,889 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:18:38,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:38,893 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:38,893 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:18:39,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-11-11 15:18:39,094 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:39,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:39,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1711243862, now seen corresponding path program 195 times [2020-11-11 15:18:39,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:39,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962014527] [2020-11-11 15:18:39,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:39,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962014527] [2020-11-11 15:18:39,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552080006] [2020-11-11 15:18:39,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:40,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-11 15:18:40,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:40,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:40,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:40,096 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:18:40,127 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:40,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:40,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:18:40,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375346012] [2020-11-11 15:18:40,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:18:40,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:40,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:18:40,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:18:40,150 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:42,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:42,639 INFO L93 Difference]: Finished difference Result 4580 states and 11750 transitions. [2020-11-11 15:18:42,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:18:42,640 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:18:42,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:42,647 INFO L225 Difference]: With dead ends: 4580 [2020-11-11 15:18:42,647 INFO L226 Difference]: Without dead ends: 4310 [2020-11-11 15:18:42,647 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=831, Invalid=2709, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:18:42,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2020-11-11 15:18:42,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 3237. [2020-11-11 15:18:42,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:42,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:18:42,704 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:18:42,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:42,704 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:18:42,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:42,705 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:18:42,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:42,707 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:42,707 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:18:42,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-11-11 15:18:42,908 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:42,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:42,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1273279780, now seen corresponding path program 196 times [2020-11-11 15:18:42,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:42,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72037056] [2020-11-11 15:18:42,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:43,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72037056] [2020-11-11 15:18:43,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281051356] [2020-11-11 15:18:43,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:43,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:18:43,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:43,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:18:43,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:43,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:43,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:43,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:18:43,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393197185] [2020-11-11 15:18:43,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:18:43,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:43,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:18:43,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:18:43,824 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:46,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:46,146 INFO L93 Difference]: Finished difference Result 4530 states and 11650 transitions. [2020-11-11 15:18:46,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:18:46,149 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:18:46,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:46,157 INFO L225 Difference]: With dead ends: 4530 [2020-11-11 15:18:46,158 INFO L226 Difference]: Without dead ends: 4260 [2020-11-11 15:18:46,158 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=801, Invalid=2505, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:18:46,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2020-11-11 15:18:46,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 3237. [2020-11-11 15:18:46,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:18:46,281 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:18:46,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:46,281 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:18:46,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:46,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:18:46,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:46,286 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:46,286 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:18:46,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:46,487 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:46,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:46,488 INFO L82 PathProgramCache]: Analyzing trace with hash -272012780, now seen corresponding path program 197 times [2020-11-11 15:18:46,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:46,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699819931] [2020-11-11 15:18:46,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:47,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699819931] [2020-11-11 15:18:47,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787776162] [2020-11-11 15:18:47,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:47,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-11 15:18:47,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:47,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:47,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:47,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:18:47,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:47,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:47,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:18:47,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142958299] [2020-11-11 15:18:47,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:18:47,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:47,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:18:47,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:18:47,424 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:49,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:49,967 INFO L93 Difference]: Finished difference Result 4480 states and 11550 transitions. [2020-11-11 15:18:49,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:18:49,969 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:18:49,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:49,975 INFO L225 Difference]: With dead ends: 4480 [2020-11-11 15:18:49,975 INFO L226 Difference]: Without dead ends: 4210 [2020-11-11 15:18:49,976 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=908, Invalid=2874, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:18:49,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4210 states. [2020-11-11 15:18:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4210 to 3237. [2020-11-11 15:18:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:50,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:18:50,068 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:18:50,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:50,068 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:18:50,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:50,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:18:50,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:50,071 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:50,071 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:18:50,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:50,272 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:50,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:50,273 INFO L82 PathProgramCache]: Analyzing trace with hash -839178654, now seen corresponding path program 198 times [2020-11-11 15:18:50,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:50,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864528223] [2020-11-11 15:18:50,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:51,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864528223] [2020-11-11 15:18:51,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557286642] [2020-11-11 15:18:51,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:51,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-11 15:18:51,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:51,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:51,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:51,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:51,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:51,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:18:51,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386786033] [2020-11-11 15:18:51,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:18:51,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:51,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:18:51,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:18:51,246 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:53,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:53,354 INFO L93 Difference]: Finished difference Result 4430 states and 11450 transitions. [2020-11-11 15:18:53,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:18:53,357 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:18:53,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:53,366 INFO L225 Difference]: With dead ends: 4430 [2020-11-11 15:18:53,366 INFO L226 Difference]: Without dead ends: 4160 [2020-11-11 15:18:53,367 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=886, Invalid=2654, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:18:53,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4160 states. [2020-11-11 15:18:53,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4160 to 3237. [2020-11-11 15:18:53,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:53,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:18:53,439 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:18:53,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:53,439 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:18:53,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:53,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:18:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:53,444 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:53,445 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:18:53,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:53,646 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:53,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:53,646 INFO L82 PathProgramCache]: Analyzing trace with hash -10467502, now seen corresponding path program 199 times [2020-11-11 15:18:53,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:53,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206756346] [2020-11-11 15:18:53,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:54,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206756346] [2020-11-11 15:18:54,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241591237] [2020-11-11 15:18:54,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:54,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:54,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:54,573 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:18:54,606 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:54,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:54,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:18:54,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865828861] [2020-11-11 15:18:54,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:18:54,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:54,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:18:54,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:18:54,638 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:57,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:18:57,451 INFO L93 Difference]: Finished difference Result 4380 states and 11350 transitions. [2020-11-11 15:18:57,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 15:18:57,453 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:18:57,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:18:57,459 INFO L225 Difference]: With dead ends: 4380 [2020-11-11 15:18:57,460 INFO L226 Difference]: Without dead ends: 4110 [2020-11-11 15:18:57,460 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1001, Invalid=3031, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:18:57,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4110 states. [2020-11-11 15:18:57,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4110 to 3237. [2020-11-11 15:18:57,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:57,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:18:57,515 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:18:57,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:18:57,515 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:18:57,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:18:57,515 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:18:57,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:18:57,519 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:18:57,519 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:18:57,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:57,720 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:18:57,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:18:57,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1733006048, now seen corresponding path program 200 times [2020-11-11 15:18:57,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:18:57,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250980287] [2020-11-11 15:18:57,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:18:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:18:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:58,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250980287] [2020-11-11 15:18:58,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759647209] [2020-11-11 15:18:58,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:18:58,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:18:58,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:18:58,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:18:58,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:18:58,511 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:18:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:18:58,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:18:58,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:18:58,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704529361] [2020-11-11 15:18:58,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:18:58,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:18:58,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:18:58,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:18:58,530 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:01,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:01,106 INFO L93 Difference]: Finished difference Result 4330 states and 11250 transitions. [2020-11-11 15:19:01,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:19:01,108 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:19:01,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:01,116 INFO L225 Difference]: With dead ends: 4330 [2020-11-11 15:19:01,116 INFO L226 Difference]: Without dead ends: 4060 [2020-11-11 15:19:01,117 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:19:01,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4060 states. [2020-11-11 15:19:01,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4060 to 3237. [2020-11-11 15:19:01,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:01,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:19:01,180 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:19:01,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:01,181 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:19:01,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:01,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:19:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:19:01,185 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:01,185 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:19:01,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-11-11 15:19:01,386 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:01,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:01,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1022425616, now seen corresponding path program 201 times [2020-11-11 15:19:01,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:01,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975092932] [2020-11-11 15:19:01,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:02,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975092932] [2020-11-11 15:19:02,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680074028] [2020-11-11 15:19:02,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:02,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-11 15:19:02,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:02,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:19:02,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:02,346 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:19:02,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:02,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:02,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:19:02,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049814953] [2020-11-11 15:19:02,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:19:02,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:02,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:19:02,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:19:02,394 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:05,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:05,730 INFO L93 Difference]: Finished difference Result 4280 states and 11150 transitions. [2020-11-11 15:19:05,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-11 15:19:05,733 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:19:05,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:05,740 INFO L225 Difference]: With dead ends: 4280 [2020-11-11 15:19:05,740 INFO L226 Difference]: Without dead ends: 4010 [2020-11-11 15:19:05,741 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1110, Invalid=3180, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:19:05,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4010 states. [2020-11-11 15:19:05,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4010 to 3237. [2020-11-11 15:19:05,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:05,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:19:05,807 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:19:05,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:05,807 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:19:05,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:05,807 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:19:05,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:19:05,812 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:05,812 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:19:06,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-11-11 15:19:06,013 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:06,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:06,013 INFO L82 PathProgramCache]: Analyzing trace with hash -334141090, now seen corresponding path program 202 times [2020-11-11 15:19:06,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:06,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661747589] [2020-11-11 15:19:06,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:06,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661747589] [2020-11-11 15:19:06,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067907813] [2020-11-11 15:19:06,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:06,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:19:06,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:06,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:19:06,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:06,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:06,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:06,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:19:06,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929084775] [2020-11-11 15:19:06,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:19:06,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:06,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:19:06,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:19:06,877 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:09,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:09,223 INFO L93 Difference]: Finished difference Result 4230 states and 11050 transitions. [2020-11-11 15:19:09,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 15:19:09,224 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:19:09,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:09,231 INFO L225 Difference]: With dead ends: 4230 [2020-11-11 15:19:09,231 INFO L226 Difference]: Without dead ends: 3960 [2020-11-11 15:19:09,232 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1104, Invalid=2928, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:19:09,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3960 states. [2020-11-11 15:19:09,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3960 to 3237. [2020-11-11 15:19:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:19:09,282 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:19:09,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:09,282 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:19:09,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:19:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:19:09,285 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:09,285 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:19:09,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-11-11 15:19:09,485 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:09,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:09,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1497391694, now seen corresponding path program 203 times [2020-11-11 15:19:09,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:09,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267979356] [2020-11-11 15:19:09,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:10,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267979356] [2020-11-11 15:19:10,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885990686] [2020-11-11 15:19:10,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:10,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-11 15:19:10,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:10,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:19:10,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:10,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:19:10,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:10,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:10,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:19:10,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968367895] [2020-11-11 15:19:10,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:19:10,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:10,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:19:10,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:19:10,410 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:13,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:13,659 INFO L93 Difference]: Finished difference Result 4225 states and 11060 transitions. [2020-11-11 15:19:13,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-11 15:19:13,661 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:19:13,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:13,670 INFO L225 Difference]: With dead ends: 4225 [2020-11-11 15:19:13,670 INFO L226 Difference]: Without dead ends: 3955 [2020-11-11 15:19:13,671 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1235, Invalid=3321, Unknown=0, NotChecked=0, Total=4556 [2020-11-11 15:19:13,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3955 states. [2020-11-11 15:19:13,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3955 to 3237. [2020-11-11 15:19:13,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.762978986402967) internal successors, (8941), 3236 states have internal predecessors, (8941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8941 transitions. [2020-11-11 15:19:13,735 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8941 transitions. Word has length 126 [2020-11-11 15:19:13,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:13,735 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8941 transitions. [2020-11-11 15:19:13,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8941 transitions. [2020-11-11 15:19:13,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:19:13,739 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:13,739 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:19:13,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2020-11-11 15:19:13,940 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:13,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:13,941 INFO L82 PathProgramCache]: Analyzing trace with hash 2126183196, now seen corresponding path program 204 times [2020-11-11 15:19:13,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:13,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991088628] [2020-11-11 15:19:13,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:14,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991088628] [2020-11-11 15:19:14,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029707666] [2020-11-11 15:19:14,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:14,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-11 15:19:14,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:14,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:19:14,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:14,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:14,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:14,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:19:14,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637898117] [2020-11-11 15:19:14,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:19:14,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:14,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:19:14,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:19:14,794 INFO L87 Difference]: Start difference. First operand 3237 states and 8941 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:17,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:17,551 INFO L93 Difference]: Finished difference Result 5312 states and 14194 transitions. [2020-11-11 15:19:17,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 15:19:17,554 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:19:17,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:17,562 INFO L225 Difference]: With dead ends: 5312 [2020-11-11 15:19:17,562 INFO L226 Difference]: Without dead ends: 5042 [2020-11-11 15:19:17,562 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1238, Invalid=3052, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:19:17,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5042 states. [2020-11-11 15:19:17,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5042 to 3362. [2020-11-11 15:19:17,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3362 states, 3361 states have (on average 2.776554596846177) internal successors, (9332), 3361 states have internal predecessors, (9332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:17,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3362 states to 3362 states and 9332 transitions. [2020-11-11 15:19:17,637 INFO L78 Accepts]: Start accepts. Automaton has 3362 states and 9332 transitions. Word has length 126 [2020-11-11 15:19:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:17,637 INFO L481 AbstractCegarLoop]: Abstraction has 3362 states and 9332 transitions. [2020-11-11 15:19:17,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:17,638 INFO L276 IsEmpty]: Start isEmpty. Operand 3362 states and 9332 transitions. [2020-11-11 15:19:17,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:19:17,641 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:17,641 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:19:17,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-11-11 15:19:17,842 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:17,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:17,843 INFO L82 PathProgramCache]: Analyzing trace with hash -457576146, now seen corresponding path program 205 times [2020-11-11 15:19:17,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:17,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294538909] [2020-11-11 15:19:17,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:18,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294538909] [2020-11-11 15:19:18,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333229897] [2020-11-11 15:19:18,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:18,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:19:18,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:18,804 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:19:18,845 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:18,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:18,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:19:18,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928026530] [2020-11-11 15:19:18,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:19:18,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:18,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:19:18,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:19:18,862 INFO L87 Difference]: Start difference. First operand 3362 states and 9332 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:22,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:22,397 INFO L93 Difference]: Finished difference Result 4351 states and 11550 transitions. [2020-11-11 15:19:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-11 15:19:22,399 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2020-11-11 15:19:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:22,404 INFO L225 Difference]: With dead ends: 4351 [2020-11-11 15:19:22,404 INFO L226 Difference]: Without dead ends: 3880 [2020-11-11 15:19:22,405 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1379, Invalid=3451, Unknown=0, NotChecked=0, Total=4830 [2020-11-11 15:19:22,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2020-11-11 15:19:22,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 2352. [2020-11-11 15:19:22,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.690769885155253) internal successors, (6326), 2351 states have internal predecessors, (6326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:22,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 6326 transitions. [2020-11-11 15:19:22,449 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 6326 transitions. Word has length 126 [2020-11-11 15:19:22,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:22,449 INFO L481 AbstractCegarLoop]: Abstraction has 2352 states and 6326 transitions. [2020-11-11 15:19:22,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:22,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 6326 transitions. [2020-11-11 15:19:22,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:22,451 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:22,451 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:19:22,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:22,652 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:22,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:22,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1003443911, now seen corresponding path program 206 times [2020-11-11 15:19:22,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:22,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306920065] [2020-11-11 15:19:22,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:23,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306920065] [2020-11-11 15:19:23,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971398892] [2020-11-11 15:19:23,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:23,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:19:23,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:23,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:19:23,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:23,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:23,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:23,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-11 15:19:23,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431369818] [2020-11-11 15:19:23,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:19:23,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:23,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:19:23,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:19:23,739 INFO L87 Difference]: Start difference. First operand 2352 states and 6326 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:25,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:25,277 INFO L93 Difference]: Finished difference Result 3745 states and 9290 transitions. [2020-11-11 15:19:25,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:19:25,279 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:19:25,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:25,286 INFO L225 Difference]: With dead ends: 3745 [2020-11-11 15:19:25,287 INFO L226 Difference]: Without dead ends: 3475 [2020-11-11 15:19:25,287 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=722, Invalid=2034, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:19:25,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3475 states. [2020-11-11 15:19:25,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3475 to 2402. [2020-11-11 15:19:25,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 2.6972094960433153) internal successors, (6476), 2401 states have internal predecessors, (6476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:25,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 6476 transitions. [2020-11-11 15:19:25,337 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 6476 transitions. Word has length 131 [2020-11-11 15:19:25,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:25,338 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 6476 transitions. [2020-11-11 15:19:25,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:25,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 6476 transitions. [2020-11-11 15:19:25,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:25,340 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:25,340 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:19:25,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-11-11 15:19:25,541 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:25,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:25,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1039470665, now seen corresponding path program 207 times [2020-11-11 15:19:25,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:25,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136817513] [2020-11-11 15:19:25,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:26,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136817513] [2020-11-11 15:19:26,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748121176] [2020-11-11 15:19:26,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:26,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-11 15:19:26,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:26,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:19:26,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:26,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:19:26,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:26,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:26,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:19:26,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133380528] [2020-11-11 15:19:26,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:19:26,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:26,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:19:26,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:19:26,745 INFO L87 Difference]: Start difference. First operand 2402 states and 6476 transitions. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:28,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:28,486 INFO L93 Difference]: Finished difference Result 4240 states and 10330 transitions. [2020-11-11 15:19:28,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:19:28,488 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:19:28,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:28,495 INFO L225 Difference]: With dead ends: 4240 [2020-11-11 15:19:28,495 INFO L226 Difference]: Without dead ends: 3970 [2020-11-11 15:19:28,495 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=780, Invalid=2300, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:19:28,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2020-11-11 15:19:28,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 2452. [2020-11-11 15:19:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 2.7033863729090166) internal successors, (6626), 2451 states have internal predecessors, (6626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:28,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 6626 transitions. [2020-11-11 15:19:28,539 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 6626 transitions. Word has length 131 [2020-11-11 15:19:28,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:28,539 INFO L481 AbstractCegarLoop]: Abstraction has 2452 states and 6626 transitions. [2020-11-11 15:19:28,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:28,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 6626 transitions. [2020-11-11 15:19:28,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:28,542 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:28,542 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:19:28,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:28,743 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:28,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1875329915, now seen corresponding path program 208 times [2020-11-11 15:19:28,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:28,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970785974] [2020-11-11 15:19:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:29,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970785974] [2020-11-11 15:19:29,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904347156] [2020-11-11 15:19:29,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:29,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:19:29,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:29,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:19:29,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:29,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:29,816 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:29,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:29,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-11 15:19:29,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911579651] [2020-11-11 15:19:29,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:19:29,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:29,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:19:29,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:19:29,817 INFO L87 Difference]: Start difference. First operand 2452 states and 6626 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:31,678 INFO L93 Difference]: Finished difference Result 4245 states and 10390 transitions. [2020-11-11 15:19:31,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:19:31,680 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:19:31,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:31,687 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:19:31,687 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:19:31,688 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=776, Invalid=2304, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:19:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:19:31,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2502. [2020-11-11 15:19:31,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2501 states have (on average 2.7093162734906038) internal successors, (6776), 2501 states have internal predecessors, (6776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:31,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 6776 transitions. [2020-11-11 15:19:31,746 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 6776 transitions. Word has length 131 [2020-11-11 15:19:31,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:31,746 INFO L481 AbstractCegarLoop]: Abstraction has 2502 states and 6776 transitions. [2020-11-11 15:19:31,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:31,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 6776 transitions. [2020-11-11 15:19:31,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:31,750 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:31,751 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:19:31,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:31,952 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:31,952 INFO L82 PathProgramCache]: Analyzing trace with hash -192822923, now seen corresponding path program 209 times [2020-11-11 15:19:31,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:31,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378143717] [2020-11-11 15:19:31,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:32,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378143717] [2020-11-11 15:19:32,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873524653] [2020-11-11 15:19:32,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:33,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-11 15:19:33,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:33,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:19:33,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:33,136 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:19:33,229 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:33,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:33,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:19:33,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009776326] [2020-11-11 15:19:33,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:19:33,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:33,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:19:33,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:19:33,285 INFO L87 Difference]: Start difference. First operand 2502 states and 6776 transitions. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:35,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:35,242 INFO L93 Difference]: Finished difference Result 4245 states and 10440 transitions. [2020-11-11 15:19:35,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:19:35,244 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:19:35,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:35,249 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:19:35,249 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:19:35,250 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=799, Invalid=2507, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:19:35,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:19:35,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2552. [2020-11-11 15:19:35,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.715013720109761) internal successors, (6926), 2551 states have internal predecessors, (6926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:35,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 6926 transitions. [2020-11-11 15:19:35,295 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 6926 transitions. Word has length 131 [2020-11-11 15:19:35,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:35,296 INFO L481 AbstractCegarLoop]: Abstraction has 2552 states and 6926 transitions. [2020-11-11 15:19:35,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:35,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 6926 transitions. [2020-11-11 15:19:35,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:35,299 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:35,299 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:19:35,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:35,500 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:35,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:35,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2045470781, now seen corresponding path program 210 times [2020-11-11 15:19:35,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:35,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454857894] [2020-11-11 15:19:35,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:36,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454857894] [2020-11-11 15:19:36,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871573193] [2020-11-11 15:19:36,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:36,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-11 15:19:36,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:36,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:19:36,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:36,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:36,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:36,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-11 15:19:36,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223817477] [2020-11-11 15:19:36,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:19:36,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:36,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:19:36,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:19:36,549 INFO L87 Difference]: Start difference. First operand 2552 states and 6926 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:38,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:38,449 INFO L93 Difference]: Finished difference Result 4245 states and 10490 transitions. [2020-11-11 15:19:38,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:19:38,450 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:19:38,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:38,457 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:19:38,457 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:19:38,457 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=809, Invalid=2497, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:19:38,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:19:38,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2602. [2020-11-11 15:19:38,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2602 states, 2601 states have (on average 2.720492118415994) internal successors, (7076), 2601 states have internal predecessors, (7076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:38,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 7076 transitions. [2020-11-11 15:19:38,503 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 7076 transitions. Word has length 131 [2020-11-11 15:19:38,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:38,503 INFO L481 AbstractCegarLoop]: Abstraction has 2602 states and 7076 transitions. [2020-11-11 15:19:38,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 7076 transitions. [2020-11-11 15:19:38,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:38,506 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:38,507 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:19:38,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-11-11 15:19:38,707 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:38,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:38,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1979578189, now seen corresponding path program 211 times [2020-11-11 15:19:38,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:38,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107054078] [2020-11-11 15:19:38,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:39,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107054078] [2020-11-11 15:19:39,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510586600] [2020-11-11 15:19:39,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:39,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:19:39,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:39,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:19:39,755 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:39,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:39,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:19:39,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7892600] [2020-11-11 15:19:39,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:19:39,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:39,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:19:39,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:19:39,781 INFO L87 Difference]: Start difference. First operand 2602 states and 7076 transitions. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:42,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:42,308 INFO L93 Difference]: Finished difference Result 4245 states and 10540 transitions. [2020-11-11 15:19:42,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:19:42,310 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:19:42,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:42,317 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:19:42,317 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:19:42,318 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=834, Invalid=2706, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:19:42,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:19:42,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2652. [2020-11-11 15:19:42,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 2.725763862693323) internal successors, (7226), 2651 states have internal predecessors, (7226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:42,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 7226 transitions. [2020-11-11 15:19:42,374 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 7226 transitions. Word has length 131 [2020-11-11 15:19:42,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:42,374 INFO L481 AbstractCegarLoop]: Abstraction has 2652 states and 7226 transitions. [2020-11-11 15:19:42,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:42,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 7226 transitions. [2020-11-11 15:19:42,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:42,378 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:42,378 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:19:42,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-11-11 15:19:42,579 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:42,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:42,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1905276799, now seen corresponding path program 212 times [2020-11-11 15:19:42,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:42,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102462845] [2020-11-11 15:19:42,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:43,290 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:43,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102462845] [2020-11-11 15:19:43,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900227472] [2020-11-11 15:19:43,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:43,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:19:43,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:43,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:19:43,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:43,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:43,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:43,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-11 15:19:43,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856289385] [2020-11-11 15:19:43,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:19:43,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:43,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:19:43,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:19:43,490 INFO L87 Difference]: Start difference. First operand 2652 states and 7226 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:45,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:45,494 INFO L93 Difference]: Finished difference Result 4245 states and 10590 transitions. [2020-11-11 15:19:45,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:19:45,496 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:19:45,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:45,500 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:19:45,501 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:19:45,501 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=858, Invalid=2682, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:19:45,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:19:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2702. [2020-11-11 15:19:45,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2702 states, 2701 states have (on average 2.7308404294705664) internal successors, (7376), 2701 states have internal predecessors, (7376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:45,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2702 states to 2702 states and 7376 transitions. [2020-11-11 15:19:45,548 INFO L78 Accepts]: Start accepts. Automaton has 2702 states and 7376 transitions. Word has length 131 [2020-11-11 15:19:45,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:45,548 INFO L481 AbstractCegarLoop]: Abstraction has 2702 states and 7376 transitions. [2020-11-11 15:19:45,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:45,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2702 states and 7376 transitions. [2020-11-11 15:19:45,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:45,551 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:45,551 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:19:45,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-11-11 15:19:45,752 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:45,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:45,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1269258895, now seen corresponding path program 213 times [2020-11-11 15:19:45,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:45,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608820805] [2020-11-11 15:19:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:46,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608820805] [2020-11-11 15:19:46,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741225209] [2020-11-11 15:19:46,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:46,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-11 15:19:46,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:46,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:19:46,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:46,807 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:19:46,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:46,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:46,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:19:46,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180023067] [2020-11-11 15:19:46,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:19:46,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:46,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:19:46,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:19:46,916 INFO L87 Difference]: Start difference. First operand 2702 states and 7376 transitions. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:49,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:49,430 INFO L93 Difference]: Finished difference Result 4245 states and 10640 transitions. [2020-11-11 15:19:49,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:19:49,431 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:19:49,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:49,437 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:19:49,437 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:19:49,438 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=885, Invalid=2897, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:19:49,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:19:49,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2752. [2020-11-11 15:19:49,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2751 states have (on average 2.7357324609233005) internal successors, (7526), 2751 states have internal predecessors, (7526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:49,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 7526 transitions. [2020-11-11 15:19:49,489 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 7526 transitions. Word has length 131 [2020-11-11 15:19:49,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:49,489 INFO L481 AbstractCegarLoop]: Abstraction has 2752 states and 7526 transitions. [2020-11-11 15:19:49,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:49,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 7526 transitions. [2020-11-11 15:19:49,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:49,492 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:49,492 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:19:49,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-11-11 15:19:49,693 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:49,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:49,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1158730049, now seen corresponding path program 214 times [2020-11-11 15:19:49,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:49,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326452298] [2020-11-11 15:19:49,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:50,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326452298] [2020-11-11 15:19:50,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093220841] [2020-11-11 15:19:50,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:50,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:19:50,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:50,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:19:50,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:50,823 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:50,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:50,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-11 15:19:50,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461496562] [2020-11-11 15:19:50,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:19:50,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:50,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:19:50,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:19:50,847 INFO L87 Difference]: Start difference. First operand 2752 states and 7526 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:53,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:53,143 INFO L93 Difference]: Finished difference Result 4245 states and 10690 transitions. [2020-11-11 15:19:53,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:19:53,146 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:19:53,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:53,153 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:19:53,154 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:19:53,154 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=923, Invalid=2859, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:19:53,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:19:53,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2802. [2020-11-11 15:19:53,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2801 states have (on average 2.740449839343092) internal successors, (7676), 2801 states have internal predecessors, (7676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:53,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 7676 transitions. [2020-11-11 15:19:53,242 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 7676 transitions. Word has length 131 [2020-11-11 15:19:53,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:53,242 INFO L481 AbstractCegarLoop]: Abstraction has 2802 states and 7676 transitions. [2020-11-11 15:19:53,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:53,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 7676 transitions. [2020-11-11 15:19:53,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:53,246 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:53,246 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:19:53,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-11-11 15:19:53,448 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:53,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:53,448 INFO L82 PathProgramCache]: Analyzing trace with hash 904558511, now seen corresponding path program 215 times [2020-11-11 15:19:53,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:53,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271149864] [2020-11-11 15:19:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:54,402 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:54,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271149864] [2020-11-11 15:19:54,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455141848] [2020-11-11 15:19:54,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:54,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-11 15:19:54,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:54,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:19:54,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:54,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:19:54,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:54,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:54,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:19:54,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909387985] [2020-11-11 15:19:54,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:19:54,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:54,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:19:54,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:19:54,718 INFO L87 Difference]: Start difference. First operand 2802 states and 7676 transitions. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:57,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:19:57,535 INFO L93 Difference]: Finished difference Result 4245 states and 10740 transitions. [2020-11-11 15:19:57,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:19:57,536 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:19:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:19:57,543 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:19:57,544 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:19:57,545 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=952, Invalid=3080, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:19:57,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:19:57,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2852. [2020-11-11 15:19:57,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2851 states have (on average 2.7450017537706066) internal successors, (7826), 2851 states have internal predecessors, (7826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 7826 transitions. [2020-11-11 15:19:57,629 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 7826 transitions. Word has length 131 [2020-11-11 15:19:57,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:19:57,630 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 7826 transitions. [2020-11-11 15:19:57,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:19:57,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 7826 transitions. [2020-11-11 15:19:57,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:19:57,633 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:19:57,633 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:19:57,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:57,835 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:19:57,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:19:57,835 INFO L82 PathProgramCache]: Analyzing trace with hash 466594429, now seen corresponding path program 216 times [2020-11-11 15:19:57,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:19:57,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248932468] [2020-11-11 15:19:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:19:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:19:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:58,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248932468] [2020-11-11 15:19:58,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082523716] [2020-11-11 15:19:58,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:19:58,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-11 15:19:58,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:19:58,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:19:58,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:19:58,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:19:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:19:58,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:19:58,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-11 15:19:58,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367233640] [2020-11-11 15:19:58,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:19:58,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:19:58,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:19:58,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:19:58,783 INFO L87 Difference]: Start difference. First operand 2852 states and 7826 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:01,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:01,101 INFO L93 Difference]: Finished difference Result 4245 states and 10790 transitions. [2020-11-11 15:20:01,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:20:01,102 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:20:01,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:01,109 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:20:01,109 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:20:01,110 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1004, Invalid=3028, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:20:01,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:20:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2902. [2020-11-11 15:20:01,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2901 states have (on average 2.7493967597380213) internal successors, (7976), 2901 states have internal predecessors, (7976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 7976 transitions. [2020-11-11 15:20:01,195 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 7976 transitions. Word has length 131 [2020-11-11 15:20:01,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:01,195 INFO L481 AbstractCegarLoop]: Abstraction has 2902 states and 7976 transitions. [2020-11-11 15:20:01,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:01,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 7976 transitions. [2020-11-11 15:20:01,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:20:01,199 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:01,199 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:20:01,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-11-11 15:20:01,400 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:01,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:01,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1078698131, now seen corresponding path program 217 times [2020-11-11 15:20:01,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:01,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569876446] [2020-11-11 15:20:01,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:02,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569876446] [2020-11-11 15:20:02,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939585600] [2020-11-11 15:20:02,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:02,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:20:02,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:02,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:20:02,610 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:02,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:02,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:20:02,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927779209] [2020-11-11 15:20:02,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:20:02,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:02,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:20:02,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:20:02,632 INFO L87 Difference]: Start difference. First operand 2902 states and 7976 transitions. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:06,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:06,051 INFO L93 Difference]: Finished difference Result 4245 states and 10840 transitions. [2020-11-11 15:20:06,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 15:20:06,052 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:20:06,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:06,060 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:20:06,060 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:20:06,061 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1035, Invalid=3255, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:20:06,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:20:06,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2952. [2020-11-11 15:20:06,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 2.753642832937987) internal successors, (8126), 2951 states have internal predecessors, (8126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 8126 transitions. [2020-11-11 15:20:06,153 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 8126 transitions. Word has length 131 [2020-11-11 15:20:06,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:06,153 INFO L481 AbstractCegarLoop]: Abstraction has 2952 states and 8126 transitions. [2020-11-11 15:20:06,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:06,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 8126 transitions. [2020-11-11 15:20:06,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:20:06,157 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:06,157 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:20:06,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:06,358 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:06,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:06,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1645864005, now seen corresponding path program 218 times [2020-11-11 15:20:06,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:06,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507475607] [2020-11-11 15:20:06,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:07,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507475607] [2020-11-11 15:20:07,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438854577] [2020-11-11 15:20:07,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:07,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:20:07,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:07,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:20:07,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:07,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:07,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:07,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-11 15:20:07,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946130706] [2020-11-11 15:20:07,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:20:07,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:07,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:20:07,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:20:07,490 INFO L87 Difference]: Start difference. First operand 2952 states and 8126 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:09,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:09,899 INFO L93 Difference]: Finished difference Result 4245 states and 10890 transitions. [2020-11-11 15:20:09,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 15:20:09,901 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:20:09,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:09,907 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:20:09,907 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:20:09,908 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1101, Invalid=3189, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:20:09,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:20:09,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 3002. [2020-11-11 15:20:09,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 2.757747417527491) internal successors, (8276), 3001 states have internal predecessors, (8276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:09,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 8276 transitions. [2020-11-11 15:20:09,993 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 8276 transitions. Word has length 131 [2020-11-11 15:20:09,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:09,993 INFO L481 AbstractCegarLoop]: Abstraction has 3002 states and 8276 transitions. [2020-11-11 15:20:09,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:09,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 8276 transitions. [2020-11-11 15:20:09,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:20:09,996 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:09,996 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:20:10,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-11-11 15:20:10,197 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:10,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:10,198 INFO L82 PathProgramCache]: Analyzing trace with hash -817152853, now seen corresponding path program 219 times [2020-11-11 15:20:10,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:10,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471080752] [2020-11-11 15:20:10,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:10,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471080752] [2020-11-11 15:20:10,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908421214] [2020-11-11 15:20:10,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:11,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-11 15:20:11,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:11,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:20:11,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:11,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:20:11,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:11,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:11,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:20:11,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847466729] [2020-11-11 15:20:11,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:20:11,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:11,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:20:11,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:20:11,178 INFO L87 Difference]: Start difference. First operand 3002 states and 8276 transitions. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:14,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:14,447 INFO L93 Difference]: Finished difference Result 4245 states and 10940 transitions. [2020-11-11 15:20:14,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-11 15:20:14,449 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:20:14,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:14,455 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:20:14,455 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:20:14,456 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1134, Invalid=3422, Unknown=0, NotChecked=0, Total=4556 [2020-11-11 15:20:14,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:20:14,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 3052. [2020-11-11 15:20:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3052 states, 3051 states have (on average 2.7617174696820714) internal successors, (8426), 3051 states have internal predecessors, (8426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:14,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 8426 transitions. [2020-11-11 15:20:14,527 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 8426 transitions. Word has length 131 [2020-11-11 15:20:14,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:14,527 INFO L481 AbstractCegarLoop]: Abstraction has 3052 states and 8426 transitions. [2020-11-11 15:20:14,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:14,527 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 8426 transitions. [2020-11-11 15:20:14,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:20:14,532 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:14,532 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:20:14,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:14,733 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:14,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:14,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1755275897, now seen corresponding path program 220 times [2020-11-11 15:20:14,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:14,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180341783] [2020-11-11 15:20:14,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:15,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180341783] [2020-11-11 15:20:15,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587609766] [2020-11-11 15:20:15,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:15,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:20:15,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:15,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:20:15,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:15,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:15,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:15,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-11 15:20:15,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925995547] [2020-11-11 15:20:15,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:20:15,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:15,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:20:15,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:20:15,846 INFO L87 Difference]: Start difference. First operand 3052 states and 8426 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:18,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:18,829 INFO L93 Difference]: Finished difference Result 4245 states and 10990 transitions. [2020-11-11 15:20:18,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 15:20:18,830 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:20:18,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:18,836 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:20:18,836 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:20:18,837 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1214, Invalid=3342, Unknown=0, NotChecked=0, Total=4556 [2020-11-11 15:20:18,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:20:18,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 3102. [2020-11-11 15:20:18,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3101 states have (on average 2.765559496936472) internal successors, (8576), 3101 states have internal predecessors, (8576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:18,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 8576 transitions. [2020-11-11 15:20:18,914 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 8576 transitions. Word has length 131 [2020-11-11 15:20:18,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:18,914 INFO L481 AbstractCegarLoop]: Abstraction has 3102 states and 8576 transitions. [2020-11-11 15:20:18,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:18,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 8576 transitions. [2020-11-11 15:20:18,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:20:18,918 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:18,918 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:20:19,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:19,119 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:19,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:19,120 INFO L82 PathProgramCache]: Analyzing trace with hash 215740265, now seen corresponding path program 221 times [2020-11-11 15:20:19,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:19,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955523941] [2020-11-11 15:20:19,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:19,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955523941] [2020-11-11 15:20:19,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217846391] [2020-11-11 15:20:19,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:19,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-11 15:20:19,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:19,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:20:19,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:19,976 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:20:20,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:20,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:20,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:20:20,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499048738] [2020-11-11 15:20:20,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:20:20,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:20,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:20:20,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:20:20,100 INFO L87 Difference]: Start difference. First operand 3102 states and 8576 transitions. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:23,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:23,378 INFO L93 Difference]: Finished difference Result 4245 states and 11040 transitions. [2020-11-11 15:20:23,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-11 15:20:23,379 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:20:23,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:23,385 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:20:23,385 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:20:23,385 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1249, Invalid=3581, Unknown=0, NotChecked=0, Total=4830 [2020-11-11 15:20:23,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:20:23,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 3152. [2020-11-11 15:20:23,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3152 states, 3151 states have (on average 2.7692795937797525) internal successors, (8726), 3151 states have internal predecessors, (8726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:23,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 8726 transitions. [2020-11-11 15:20:23,443 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 8726 transitions. Word has length 131 [2020-11-11 15:20:23,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:23,443 INFO L481 AbstractCegarLoop]: Abstraction has 3152 states and 8726 transitions. [2020-11-11 15:20:23,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:23,443 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 8726 transitions. [2020-11-11 15:20:23,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:20:23,447 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:23,447 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:20:23,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-11-11 15:20:23,648 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:23,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:23,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1140826441, now seen corresponding path program 222 times [2020-11-11 15:20:23,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:23,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376448325] [2020-11-11 15:20:23,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:24,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376448325] [2020-11-11 15:20:24,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653346051] [2020-11-11 15:20:24,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:24,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-11 15:20:24,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:24,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:20:24,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:24,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:24,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:24,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-11 15:20:24,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87884796] [2020-11-11 15:20:24,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:20:24,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:24,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:20:24,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:20:24,704 INFO L87 Difference]: Start difference. First operand 3152 states and 8726 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:27,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:27,622 INFO L93 Difference]: Finished difference Result 4245 states and 11090 transitions. [2020-11-11 15:20:27,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-11 15:20:27,625 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:20:27,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:27,630 INFO L225 Difference]: With dead ends: 4245 [2020-11-11 15:20:27,630 INFO L226 Difference]: Without dead ends: 3975 [2020-11-11 15:20:27,630 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1343, Invalid=3487, Unknown=0, NotChecked=0, Total=4830 [2020-11-11 15:20:27,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2020-11-11 15:20:27,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 3202. [2020-11-11 15:20:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3202 states, 3201 states have (on average 2.7728834739144017) internal successors, (8876), 3201 states have internal predecessors, (8876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:27,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3202 states to 3202 states and 8876 transitions. [2020-11-11 15:20:27,687 INFO L78 Accepts]: Start accepts. Automaton has 3202 states and 8876 transitions. Word has length 131 [2020-11-11 15:20:27,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:27,688 INFO L481 AbstractCegarLoop]: Abstraction has 3202 states and 8876 transitions. [2020-11-11 15:20:27,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:27,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3202 states and 8876 transitions. [2020-11-11 15:20:27,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:20:27,692 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:27,692 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:20:27,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:27,892 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:27,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:27,893 INFO L82 PathProgramCache]: Analyzing trace with hash 690706343, now seen corresponding path program 223 times [2020-11-11 15:20:27,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:27,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459724982] [2020-11-11 15:20:27,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:28,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459724982] [2020-11-11 15:20:28,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158240510] [2020-11-11 15:20:28,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:28,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:20:28,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:28,988 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:20:29,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:29,120 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:29,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:29,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:20:29,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422749500] [2020-11-11 15:20:29,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:20:29,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:29,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:20:29,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:20:29,122 INFO L87 Difference]: Start difference. First operand 3202 states and 8876 transitions. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:33,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:33,293 INFO L93 Difference]: Finished difference Result 4290 states and 11260 transitions. [2020-11-11 15:20:33,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-11 15:20:33,294 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:20:33,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:33,301 INFO L225 Difference]: With dead ends: 4290 [2020-11-11 15:20:33,302 INFO L226 Difference]: Without dead ends: 4020 [2020-11-11 15:20:33,303 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1380, Invalid=3732, Unknown=0, NotChecked=0, Total=5112 [2020-11-11 15:20:33,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4020 states. [2020-11-11 15:20:33,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4020 to 3252. [2020-11-11 15:20:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3252 states, 3251 states have (on average 2.78099046447247) internal successors, (9041), 3251 states have internal predecessors, (9041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:33,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3252 states to 3252 states and 9041 transitions. [2020-11-11 15:20:33,371 INFO L78 Accepts]: Start accepts. Automaton has 3252 states and 9041 transitions. Word has length 131 [2020-11-11 15:20:33,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:33,371 INFO L481 AbstractCegarLoop]: Abstraction has 3252 states and 9041 transitions. [2020-11-11 15:20:33,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:33,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3252 states and 9041 transitions. [2020-11-11 15:20:33,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:20:33,375 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:33,375 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:20:33,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-11-11 15:20:33,576 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:33,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:33,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1319497845, now seen corresponding path program 224 times [2020-11-11 15:20:33,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:33,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030123902] [2020-11-11 15:20:33,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:34,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030123902] [2020-11-11 15:20:34,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928866183] [2020-11-11 15:20:34,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:34,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:20:34,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:34,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:20:34,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:34,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:34,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:34,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-11 15:20:34,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768284307] [2020-11-11 15:20:34,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:20:34,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:34,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:20:34,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:20:34,703 INFO L87 Difference]: Start difference. First operand 3252 states and 9041 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:38,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:38,059 INFO L93 Difference]: Finished difference Result 5352 states and 14344 transitions. [2020-11-11 15:20:38,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-11 15:20:38,060 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:20:38,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:38,067 INFO L225 Difference]: With dead ends: 5352 [2020-11-11 15:20:38,067 INFO L226 Difference]: Without dead ends: 5082 [2020-11-11 15:20:38,067 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1489, Invalid=3623, Unknown=0, NotChecked=0, Total=5112 [2020-11-11 15:20:38,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5082 states. [2020-11-11 15:20:38,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5082 to 3377. [2020-11-11 15:20:38,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3377 states, 3376 states have (on average 2.793838862559242) internal successors, (9432), 3376 states have internal predecessors, (9432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:38,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3377 states to 3377 states and 9432 transitions. [2020-11-11 15:20:38,128 INFO L78 Accepts]: Start accepts. Automaton has 3377 states and 9432 transitions. Word has length 131 [2020-11-11 15:20:38,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:38,129 INFO L481 AbstractCegarLoop]: Abstraction has 3377 states and 9432 transitions. [2020-11-11 15:20:38,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:38,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3377 states and 9432 transitions. [2020-11-11 15:20:38,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:20:38,132 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:38,132 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:20:38,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-11-11 15:20:38,333 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:38,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:38,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1264261497, now seen corresponding path program 225 times [2020-11-11 15:20:38,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:38,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449671182] [2020-11-11 15:20:38,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:39,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449671182] [2020-11-11 15:20:39,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669822201] [2020-11-11 15:20:39,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:39,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-11 15:20:39,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:39,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:20:39,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:39,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:20:39,386 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:39,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:39,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:20:39,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019561714] [2020-11-11 15:20:39,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:20:39,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:39,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:20:39,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:20:39,405 INFO L87 Difference]: Start difference. First operand 3377 states and 9432 transitions. Second operand has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:43,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:43,226 INFO L93 Difference]: Finished difference Result 4747 states and 12590 transitions. [2020-11-11 15:20:43,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-11 15:20:43,228 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:20:43,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:43,236 INFO L225 Difference]: With dead ends: 4747 [2020-11-11 15:20:43,236 INFO L226 Difference]: Without dead ends: 4220 [2020-11-11 15:20:43,236 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1574, Invalid=4278, Unknown=0, NotChecked=0, Total=5852 [2020-11-11 15:20:43,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4220 states. [2020-11-11 15:20:43,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4220 to 3387. [2020-11-11 15:20:43,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3387 states, 3386 states have (on average 2.786769049025399) internal successors, (9436), 3386 states have internal predecessors, (9436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 9436 transitions. [2020-11-11 15:20:43,297 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 9436 transitions. Word has length 131 [2020-11-11 15:20:43,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:43,297 INFO L481 AbstractCegarLoop]: Abstraction has 3387 states and 9436 transitions. [2020-11-11 15:20:43,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:43,297 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 9436 transitions. [2020-11-11 15:20:43,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:20:43,301 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:43,301 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:20:43,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-11-11 15:20:43,502 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:43,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:43,503 INFO L82 PathProgramCache]: Analyzing trace with hash -740261679, now seen corresponding path program 226 times [2020-11-11 15:20:43,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:43,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671203304] [2020-11-11 15:20:43,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:44,485 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:44,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671203304] [2020-11-11 15:20:44,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535272045] [2020-11-11 15:20:44,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:44,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:20:44,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:44,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:20:44,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:44,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:44,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:44,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:44,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-11-11 15:20:44,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883469069] [2020-11-11 15:20:44,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:20:44,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:44,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:20:44,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=676, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:20:44,724 INFO L87 Difference]: Start difference. First operand 3387 states and 9436 transitions. Second operand has 30 states, 30 states have (on average 5.2) internal successors, (156), 30 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:46,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:46,547 INFO L93 Difference]: Finished difference Result 4705 states and 12520 transitions. [2020-11-11 15:20:46,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:20:46,548 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.2) internal successors, (156), 30 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:20:46,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:46,554 INFO L225 Difference]: With dead ends: 4705 [2020-11-11 15:20:46,554 INFO L226 Difference]: Without dead ends: 4371 [2020-11-11 15:20:46,555 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=885, Invalid=2421, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:20:46,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2020-11-11 15:20:46,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3472. [2020-11-11 15:20:46,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3472 states, 3471 states have (on average 2.767502160760588) internal successors, (9606), 3471 states have internal predecessors, (9606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:46,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3472 states to 3472 states and 9606 transitions. [2020-11-11 15:20:46,606 INFO L78 Accepts]: Start accepts. Automaton has 3472 states and 9606 transitions. Word has length 136 [2020-11-11 15:20:46,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:46,606 INFO L481 AbstractCegarLoop]: Abstraction has 3472 states and 9606 transitions. [2020-11-11 15:20:46,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.2) internal successors, (156), 30 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:46,606 INFO L276 IsEmpty]: Start isEmpty. Operand 3472 states and 9606 transitions. [2020-11-11 15:20:46,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:20:46,609 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:46,609 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:20:46,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-11-11 15:20:46,810 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:46,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:46,811 INFO L82 PathProgramCache]: Analyzing trace with hash 91885183, now seen corresponding path program 227 times [2020-11-11 15:20:46,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:46,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103717243] [2020-11-11 15:20:46,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:47,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103717243] [2020-11-11 15:20:47,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073151595] [2020-11-11 15:20:47,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:47,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-11 15:20:47,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:47,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:20:47,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:47,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:47,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:47,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:20:47,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485000072] [2020-11-11 15:20:47,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:20:47,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:47,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:20:47,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:20:47,869 INFO L87 Difference]: Start difference. First operand 3472 states and 9606 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:49,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:49,451 INFO L93 Difference]: Finished difference Result 5470 states and 13730 transitions. [2020-11-11 15:20:49,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:20:49,452 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:20:49,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:49,459 INFO L225 Difference]: With dead ends: 5470 [2020-11-11 15:20:49,459 INFO L226 Difference]: Without dead ends: 5200 [2020-11-11 15:20:49,459 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=730, Invalid=1922, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:20:49,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5200 states. [2020-11-11 15:20:49,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5200 to 3487. [2020-11-11 15:20:49,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:49,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:20:49,505 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:20:49,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:49,505 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:20:49,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:49,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:20:49,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:20:49,508 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:49,508 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:20:49,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-11-11 15:20:49,709 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:49,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:49,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1635828881, now seen corresponding path program 228 times [2020-11-11 15:20:49,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:49,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581173370] [2020-11-11 15:20:49,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:50,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581173370] [2020-11-11 15:20:50,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503690530] [2020-11-11 15:20:50,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:50,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-11 15:20:50,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:50,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:20:50,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:50,812 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:20:50,835 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:50,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:50,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:20:50,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459376889] [2020-11-11 15:20:50,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:20:50,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:50,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:20:50,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:20:50,863 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:52,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:52,658 INFO L93 Difference]: Finished difference Result 5355 states and 13500 transitions. [2020-11-11 15:20:52,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:20:52,659 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:20:52,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:52,666 INFO L225 Difference]: With dead ends: 5355 [2020-11-11 15:20:52,666 INFO L226 Difference]: Without dead ends: 5085 [2020-11-11 15:20:52,667 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=801, Invalid=2279, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:20:52,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5085 states. [2020-11-11 15:20:52,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5085 to 3487. [2020-11-11 15:20:52,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:20:52,718 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:20:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:52,718 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:20:52,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:52,719 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:20:52,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:20:52,722 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:52,722 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:20:52,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:52,922 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:52,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:52,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1726340797, now seen corresponding path program 229 times [2020-11-11 15:20:52,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:52,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987059979] [2020-11-11 15:20:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:53,721 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:53,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987059979] [2020-11-11 15:20:53,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008256595] [2020-11-11 15:20:53,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:53,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:20:53,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:53,839 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:53,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:53,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:20:53,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66296741] [2020-11-11 15:20:53,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:20:53,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:53,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:20:53,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:20:53,868 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:55,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:55,560 INFO L93 Difference]: Finished difference Result 5330 states and 13450 transitions. [2020-11-11 15:20:55,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:20:55,562 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:20:55,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:55,569 INFO L225 Difference]: With dead ends: 5330 [2020-11-11 15:20:55,569 INFO L226 Difference]: Without dead ends: 5060 [2020-11-11 15:20:55,569 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=733, Invalid=2129, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:20:55,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5060 states. [2020-11-11 15:20:55,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5060 to 3487. [2020-11-11 15:20:55,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:55,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:20:55,622 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:20:55,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:55,622 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:20:55,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:55,622 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:20:55,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:20:55,625 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:55,625 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:20:55,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:55,826 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:55,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:55,827 INFO L82 PathProgramCache]: Analyzing trace with hash -316573779, now seen corresponding path program 230 times [2020-11-11 15:20:55,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:55,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485941195] [2020-11-11 15:20:55,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:20:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:56,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485941195] [2020-11-11 15:20:56,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944079027] [2020-11-11 15:20:56,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:56,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:20:56,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:20:56,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:20:56,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:20:56,859 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:20:56,881 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:20:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:20:56,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:20:56,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:20:56,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552998518] [2020-11-11 15:20:56,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:20:56,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:20:56,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:20:56,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:20:56,908 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:58,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:20:58,966 INFO L93 Difference]: Finished difference Result 5280 states and 13350 transitions. [2020-11-11 15:20:58,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:20:58,967 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:20:58,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:20:58,974 INFO L225 Difference]: With dead ends: 5280 [2020-11-11 15:20:58,974 INFO L226 Difference]: Without dead ends: 5010 [2020-11-11 15:20:58,974 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=812, Invalid=2494, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:20:58,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5010 states. [2020-11-11 15:20:59,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5010 to 3487. [2020-11-11 15:20:59,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:20:59,026 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:20:59,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:20:59,026 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:20:59,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:20:59,026 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:20:59,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:20:59,029 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:20:59,029 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:20:59,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:20:59,230 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:20:59,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:20:59,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1152433029, now seen corresponding path program 231 times [2020-11-11 15:20:59,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:20:59,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895060419] [2020-11-11 15:20:59,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:20:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:00,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895060419] [2020-11-11 15:21:00,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869807762] [2020-11-11 15:21:00,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:00,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-11 15:21:00,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:00,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:00,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:00,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:00,182 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:00,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:00,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:21:00,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224103942] [2020-11-11 15:21:00,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:21:00,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:00,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:21:00,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:21:00,184 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:02,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:02,086 INFO L93 Difference]: Finished difference Result 5230 states and 13250 transitions. [2020-11-11 15:21:02,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:21:02,088 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:21:02,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:02,094 INFO L225 Difference]: With dead ends: 5230 [2020-11-11 15:21:02,094 INFO L226 Difference]: Without dead ends: 4960 [2020-11-11 15:21:02,094 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=752, Invalid=2328, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:21:02,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4960 states. [2020-11-11 15:21:02,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4960 to 3487. [2020-11-11 15:21:02,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:02,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:02,145 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:02,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:02,145 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:02,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:02,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:02,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:02,148 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:02,148 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:02,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:02,349 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:02,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:02,349 INFO L82 PathProgramCache]: Analyzing trace with hash 530073963, now seen corresponding path program 232 times [2020-11-11 15:21:02,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:02,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024849481] [2020-11-11 15:21:02,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:03,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024849481] [2020-11-11 15:21:03,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782933287] [2020-11-11 15:21:03,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:03,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:21:03,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:03,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:21:03,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:03,349 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:21:03,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:03,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:03,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:21:03,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991840877] [2020-11-11 15:21:03,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:21:03,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:03,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:21:03,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:21:03,401 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:05,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:05,507 INFO L93 Difference]: Finished difference Result 5180 states and 13150 transitions. [2020-11-11 15:21:05,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:21:05,509 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:21:05,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:05,515 INFO L225 Difference]: With dead ends: 5180 [2020-11-11 15:21:05,515 INFO L226 Difference]: Without dead ends: 4910 [2020-11-11 15:21:05,516 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:21:05,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4910 states. [2020-11-11 15:21:05,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4910 to 3487. [2020-11-11 15:21:05,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:05,564 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:05,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:05,564 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:05,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:05,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:05,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:05,568 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:05,568 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:05,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:05,768 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:05,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:05,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1322573895, now seen corresponding path program 233 times [2020-11-11 15:21:05,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:05,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194857612] [2020-11-11 15:21:05,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:06,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194857612] [2020-11-11 15:21:06,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809611015] [2020-11-11 15:21:06,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:06,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-11 15:21:06,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:06,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:06,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:06,655 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:06,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:06,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:21:06,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47929017] [2020-11-11 15:21:06,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:21:06,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:06,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:21:06,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:21:06,681 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:08,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:08,693 INFO L93 Difference]: Finished difference Result 5130 states and 13050 transitions. [2020-11-11 15:21:08,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:21:08,695 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:21:08,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:08,701 INFO L225 Difference]: With dead ends: 5130 [2020-11-11 15:21:08,701 INFO L226 Difference]: Without dead ends: 4860 [2020-11-11 15:21:08,701 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=787, Invalid=2519, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:21:08,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4860 states. [2020-11-11 15:21:08,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4860 to 3487. [2020-11-11 15:21:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:08,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:08,751 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:08,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:08,751 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:08,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:08,751 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:08,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:08,754 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:08,754 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:08,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2020-11-11 15:21:08,955 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:08,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:08,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1256681303, now seen corresponding path program 234 times [2020-11-11 15:21:08,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:08,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745693726] [2020-11-11 15:21:08,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:09,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745693726] [2020-11-11 15:21:09,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68732794] [2020-11-11 15:21:09,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:09,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-11 15:21:09,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:09,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:09,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:09,856 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:21:09,883 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:09,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:09,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:21:09,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337185846] [2020-11-11 15:21:09,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:21:09,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:09,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:21:09,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:21:09,908 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:12,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:12,486 INFO L93 Difference]: Finished difference Result 5080 states and 12950 transitions. [2020-11-11 15:21:12,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:21:12,488 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:21:12,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:12,494 INFO L225 Difference]: With dead ends: 5080 [2020-11-11 15:21:12,494 INFO L226 Difference]: Without dead ends: 4810 [2020-11-11 15:21:12,495 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=882, Invalid=2900, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:21:12,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4810 states. [2020-11-11 15:21:12,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4810 to 3487. [2020-11-11 15:21:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:12,545 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:12,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:12,545 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:12,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:12,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:12,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:12,550 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:12,550 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:12,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-11-11 15:21:12,750 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:12,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:12,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1182379913, now seen corresponding path program 235 times [2020-11-11 15:21:12,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:12,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730245227] [2020-11-11 15:21:12,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:13,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730245227] [2020-11-11 15:21:13,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916683865] [2020-11-11 15:21:13,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:13,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:13,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:13,635 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:13,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:13,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:21:13,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717693413] [2020-11-11 15:21:13,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:21:13,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:13,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:21:13,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:21:13,659 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:15,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:15,935 INFO L93 Difference]: Finished difference Result 5030 states and 12850 transitions. [2020-11-11 15:21:15,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:21:15,937 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:21:15,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:15,943 INFO L225 Difference]: With dead ends: 5030 [2020-11-11 15:21:15,943 INFO L226 Difference]: Without dead ends: 4760 [2020-11-11 15:21:15,944 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=838, Invalid=2702, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:21:15,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2020-11-11 15:21:15,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 3487. [2020-11-11 15:21:15,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:15,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:15,994 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:15,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:15,994 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:15,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:15,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:15,997 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:15,997 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:16,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-11-11 15:21:16,198 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:16,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:16,199 INFO L82 PathProgramCache]: Analyzing trace with hash -546362009, now seen corresponding path program 236 times [2020-11-11 15:21:16,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:16,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060078342] [2020-11-11 15:21:16,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:17,016 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:17,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060078342] [2020-11-11 15:21:17,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454186143] [2020-11-11 15:21:17,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:17,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:21:17,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:17,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:17,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:17,168 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:21:17,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:17,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:17,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:21:17,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976497245] [2020-11-11 15:21:17,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:21:17,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:17,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:21:17,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:21:17,221 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:19,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:19,758 INFO L93 Difference]: Finished difference Result 4980 states and 12750 transitions. [2020-11-11 15:21:19,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:21:19,760 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:21:19,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:19,766 INFO L225 Difference]: With dead ends: 4980 [2020-11-11 15:21:19,766 INFO L226 Difference]: Without dead ends: 4710 [2020-11-11 15:21:19,767 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=941, Invalid=3091, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:21:19,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4710 states. [2020-11-11 15:21:19,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4710 to 3487. [2020-11-11 15:21:19,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:19,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:19,818 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:19,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:19,818 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:19,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:19,818 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:19,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:19,822 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:19,822 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:20,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:20,023 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:20,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:20,023 INFO L82 PathProgramCache]: Analyzing trace with hash -435833163, now seen corresponding path program 237 times [2020-11-11 15:21:20,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:20,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555549381] [2020-11-11 15:21:20,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:20,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555549381] [2020-11-11 15:21:20,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273898529] [2020-11-11 15:21:20,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:20,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-11 15:21:20,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:20,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:20,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:20,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:20,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:20,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:21:20,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585495266] [2020-11-11 15:21:20,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:21:20,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:20,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:21:20,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:21:20,932 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:23,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:23,141 INFO L93 Difference]: Finished difference Result 4930 states and 12650 transitions. [2020-11-11 15:21:23,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:21:23,143 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:21:23,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:23,149 INFO L225 Difference]: With dead ends: 4930 [2020-11-11 15:21:23,150 INFO L226 Difference]: Without dead ends: 4660 [2020-11-11 15:21:23,150 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=905, Invalid=2877, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:21:23,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4660 states. [2020-11-11 15:21:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4660 to 3487. [2020-11-11 15:21:23,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:23,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:23,199 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:23,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:23,199 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:23,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:23,199 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:23,202 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:23,203 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:23,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2020-11-11 15:21:23,403 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:23,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:23,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1627455397, now seen corresponding path program 238 times [2020-11-11 15:21:23,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:23,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158066929] [2020-11-11 15:21:23,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:24,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158066929] [2020-11-11 15:21:24,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998286887] [2020-11-11 15:21:24,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:24,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:21:24,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:24,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:21:24,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:24,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:21:24,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:24,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:24,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:21:24,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070611522] [2020-11-11 15:21:24,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:21:24,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:24,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:21:24,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:21:24,407 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:27,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:27,085 INFO L93 Difference]: Finished difference Result 4880 states and 12550 transitions. [2020-11-11 15:21:27,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 15:21:27,087 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:21:27,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:27,093 INFO L225 Difference]: With dead ends: 4880 [2020-11-11 15:21:27,093 INFO L226 Difference]: Without dead ends: 4610 [2020-11-11 15:21:27,093 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1016, Invalid=3274, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:21:27,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2020-11-11 15:21:27,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 3487. [2020-11-11 15:21:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:27,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:27,142 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:27,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:27,143 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:27,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:27,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:27,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:27,146 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:27,146 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:27,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-11-11 15:21:27,347 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:27,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:27,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1189491315, now seen corresponding path program 239 times [2020-11-11 15:21:27,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:27,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166599345] [2020-11-11 15:21:27,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:28,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166599345] [2020-11-11 15:21:28,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114524368] [2020-11-11 15:21:28,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:28,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-11 15:21:28,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:28,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:28,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:28,234 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:28,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:28,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:21:28,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684218307] [2020-11-11 15:21:28,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:21:28,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:28,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:21:28,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:21:28,255 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:30,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:30,585 INFO L93 Difference]: Finished difference Result 4830 states and 12450 transitions. [2020-11-11 15:21:30,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:21:30,587 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:21:30,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:30,593 INFO L225 Difference]: With dead ends: 4830 [2020-11-11 15:21:30,593 INFO L226 Difference]: Without dead ends: 4560 [2020-11-11 15:21:30,593 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=988, Invalid=3044, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:21:30,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4560 states. [2020-11-11 15:21:30,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4560 to 3487. [2020-11-11 15:21:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:30,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:30,642 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:30,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:30,642 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:30,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:30,642 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:30,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:30,645 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:30,646 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:30,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:30,846 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:30,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:30,847 INFO L82 PathProgramCache]: Analyzing trace with hash -355801245, now seen corresponding path program 240 times [2020-11-11 15:21:30,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:30,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227297009] [2020-11-11 15:21:30,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:31,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227297009] [2020-11-11 15:21:31,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641519359] [2020-11-11 15:21:31,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:31,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-11 15:21:31,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:31,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:31,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:31,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:21:31,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:31,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:31,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:21:31,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581735270] [2020-11-11 15:21:31,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:21:31,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:31,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:21:31,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:21:31,831 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:34,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:34,783 INFO L93 Difference]: Finished difference Result 4780 states and 12350 transitions. [2020-11-11 15:21:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-11 15:21:34,785 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:21:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:34,791 INFO L225 Difference]: With dead ends: 4780 [2020-11-11 15:21:34,791 INFO L226 Difference]: Without dead ends: 4510 [2020-11-11 15:21:34,792 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1107, Invalid=3449, Unknown=0, NotChecked=0, Total=4556 [2020-11-11 15:21:34,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2020-11-11 15:21:34,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 3487. [2020-11-11 15:21:34,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:34,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:34,841 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:34,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:34,841 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:34,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:34,842 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:34,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:34,845 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:34,845 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:35,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:35,046 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:35,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:35,046 INFO L82 PathProgramCache]: Analyzing trace with hash -922967119, now seen corresponding path program 241 times [2020-11-11 15:21:35,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:35,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230687465] [2020-11-11 15:21:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:35,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:35,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230687465] [2020-11-11 15:21:35,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733937626] [2020-11-11 15:21:35,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:35,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:35,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:35,859 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:35,880 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:35,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:35,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:21:35,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999851952] [2020-11-11 15:21:35,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:21:35,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:35,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:21:35,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:21:35,881 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:38,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:38,250 INFO L93 Difference]: Finished difference Result 4730 states and 12250 transitions. [2020-11-11 15:21:38,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 15:21:38,251 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:21:38,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:38,257 INFO L225 Difference]: With dead ends: 4730 [2020-11-11 15:21:38,257 INFO L226 Difference]: Without dead ends: 4460 [2020-11-11 15:21:38,258 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1087, Invalid=3203, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:21:38,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2020-11-11 15:21:38,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3487. [2020-11-11 15:21:38,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:38,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:38,308 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:38,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:38,308 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:38,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:38,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:38,311 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:38,312 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:38,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:38,512 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:38,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:38,513 INFO L82 PathProgramCache]: Analyzing trace with hash -94255967, now seen corresponding path program 242 times [2020-11-11 15:21:38,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:38,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494258222] [2020-11-11 15:21:38,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:39,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494258222] [2020-11-11 15:21:39,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4616178] [2020-11-11 15:21:39,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:39,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:21:39,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:39,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:39,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:39,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:21:39,424 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:39,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:39,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:21:39,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376382466] [2020-11-11 15:21:39,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:21:39,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:39,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:21:39,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:21:39,445 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:42,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:42,500 INFO L93 Difference]: Finished difference Result 4680 states and 12150 transitions. [2020-11-11 15:21:42,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-11 15:21:42,502 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:21:42,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:42,507 INFO L225 Difference]: With dead ends: 4680 [2020-11-11 15:21:42,507 INFO L226 Difference]: Without dead ends: 4410 [2020-11-11 15:21:42,508 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1214, Invalid=3616, Unknown=0, NotChecked=0, Total=4830 [2020-11-11 15:21:42,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4410 states. [2020-11-11 15:21:42,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4410 to 3487. [2020-11-11 15:21:42,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:42,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:42,556 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:42,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:42,556 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:42,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:42,556 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:42,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:42,559 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:42,560 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:42,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:42,760 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:42,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:42,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1816794513, now seen corresponding path program 243 times [2020-11-11 15:21:42,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:42,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855973180] [2020-11-11 15:21:42,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:43,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855973180] [2020-11-11 15:21:43,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675993748] [2020-11-11 15:21:43,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:43,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-11 15:21:43,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:43,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:43,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:43,581 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:43,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:43,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:21:43,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818464516] [2020-11-11 15:21:43,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:21:43,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:43,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:21:43,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:21:43,628 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:46,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:46,098 INFO L93 Difference]: Finished difference Result 4630 states and 12050 transitions. [2020-11-11 15:21:46,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 15:21:46,099 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:21:46,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:46,106 INFO L225 Difference]: With dead ends: 4630 [2020-11-11 15:21:46,106 INFO L226 Difference]: Without dead ends: 4360 [2020-11-11 15:21:46,107 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1202, Invalid=3354, Unknown=0, NotChecked=0, Total=4556 [2020-11-11 15:21:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4360 states. [2020-11-11 15:21:46,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4360 to 3487. [2020-11-11 15:21:46,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:46,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:46,155 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:46,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:46,155 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:46,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:46,156 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:46,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:46,160 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:46,160 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:46,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2020-11-11 15:21:46,372 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:46,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:46,372 INFO L82 PathProgramCache]: Analyzing trace with hash 938637151, now seen corresponding path program 244 times [2020-11-11 15:21:46,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:46,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857088563] [2020-11-11 15:21:46,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:47,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857088563] [2020-11-11 15:21:47,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320359217] [2020-11-11 15:21:47,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:47,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:21:47,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:47,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:21:47,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:47,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:21:47,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:47,349 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:47,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:47,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:21:47,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14885647] [2020-11-11 15:21:47,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:21:47,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:47,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:21:47,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:21:47,351 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:50,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:50,459 INFO L93 Difference]: Finished difference Result 4580 states and 11950 transitions. [2020-11-11 15:21:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-11 15:21:50,463 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:21:50,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:50,469 INFO L225 Difference]: With dead ends: 4580 [2020-11-11 15:21:50,469 INFO L226 Difference]: Without dead ends: 4310 [2020-11-11 15:21:50,470 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1337, Invalid=3775, Unknown=0, NotChecked=0, Total=5112 [2020-11-11 15:21:50,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2020-11-11 15:21:50,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 3487. [2020-11-11 15:21:50,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:50,526 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:50,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:50,527 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:50,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:50,527 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:50,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:50,531 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:50,531 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:50,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-11-11 15:21:50,738 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:50,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:50,739 INFO L82 PathProgramCache]: Analyzing trace with hash -417929555, now seen corresponding path program 245 times [2020-11-11 15:21:50,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:50,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893021658] [2020-11-11 15:21:50,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:51,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893021658] [2020-11-11 15:21:51,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141060876] [2020-11-11 15:21:51,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:51,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-11 15:21:51,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:51,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:51,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:51,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:51,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:51,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:21:51,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988962200] [2020-11-11 15:21:51,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:21:51,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:51,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:21:51,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:21:51,622 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:54,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:54,167 INFO L93 Difference]: Finished difference Result 4530 states and 11850 transitions. [2020-11-11 15:21:54,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-11 15:21:54,169 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:21:54,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:54,175 INFO L225 Difference]: With dead ends: 4530 [2020-11-11 15:21:54,175 INFO L226 Difference]: Without dead ends: 4260 [2020-11-11 15:21:54,176 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1333, Invalid=3497, Unknown=0, NotChecked=0, Total=4830 [2020-11-11 15:21:54,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2020-11-11 15:21:54,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 3487. [2020-11-11 15:21:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.7641996557659207) internal successors, (9636), 3486 states have internal predecessors, (9636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:54,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9636 transitions. [2020-11-11 15:21:54,226 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9636 transitions. Word has length 136 [2020-11-11 15:21:54,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:54,226 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9636 transitions. [2020-11-11 15:21:54,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:54,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9636 transitions. [2020-11-11 15:21:54,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:54,229 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:54,230 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:54,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-11-11 15:21:54,431 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:54,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:54,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1413603229, now seen corresponding path program 246 times [2020-11-11 15:21:54,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:54,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057981944] [2020-11-11 15:21:54,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:55,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057981944] [2020-11-11 15:21:55,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983294340] [2020-11-11 15:21:55,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:55,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-11 15:21:55,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:21:55,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:55,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:55,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:21:55,358 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:55,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:55,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:21:55,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690090735] [2020-11-11 15:21:55,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:21:55,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:55,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:21:55,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:21:55,378 INFO L87 Difference]: Start difference. First operand 3487 states and 9636 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:58,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:21:58,754 INFO L93 Difference]: Finished difference Result 4525 states and 11860 transitions. [2020-11-11 15:21:58,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-11-11 15:21:58,756 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:21:58,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:21:58,762 INFO L225 Difference]: With dead ends: 4525 [2020-11-11 15:21:58,762 INFO L226 Difference]: Without dead ends: 4255 [2020-11-11 15:21:58,762 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1476, Invalid=3926, Unknown=0, NotChecked=0, Total=5402 [2020-11-11 15:21:58,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4255 states. [2020-11-11 15:21:58,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4255 to 3487. [2020-11-11 15:21:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3486 states have (on average 2.765633964429145) internal successors, (9641), 3486 states have internal predecessors, (9641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:58,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 9641 transitions. [2020-11-11 15:21:58,808 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 9641 transitions. Word has length 136 [2020-11-11 15:21:58,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:21:58,808 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 9641 transitions. [2020-11-11 15:21:58,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:21:58,808 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 9641 transitions. [2020-11-11 15:21:58,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:21:58,811 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:21:58,811 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:21:59,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-11-11 15:21:59,013 INFO L429 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:21:59,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:21:59,014 INFO L82 PathProgramCache]: Analyzing trace with hash 2042394731, now seen corresponding path program 247 times [2020-11-11 15:21:59,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:21:59,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395124807] [2020-11-11 15:21:59,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:21:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:59,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395124807] [2020-11-11 15:21:59,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258122893] [2020-11-11 15:21:59,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:21:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:21:59,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:21:59,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:21:59,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:21:59,899 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:21:59,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:21:59,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-11-11 15:21:59,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52797334] [2020-11-11 15:21:59,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-11 15:21:59,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:21:59,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-11 15:21:59,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:21:59,901 INFO L87 Difference]: Start difference. First operand 3487 states and 9641 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:02,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:02,698 INFO L93 Difference]: Finished difference Result 5612 states and 14994 transitions. [2020-11-11 15:22:02,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-11 15:22:02,700 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:22:02,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:02,706 INFO L225 Difference]: With dead ends: 5612 [2020-11-11 15:22:02,706 INFO L226 Difference]: Without dead ends: 5342 [2020-11-11 15:22:02,707 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1481, Invalid=3631, Unknown=0, NotChecked=0, Total=5112 [2020-11-11 15:22:02,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5342 states. [2020-11-11 15:22:02,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5342 to 3612. [2020-11-11 15:22:02,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3612 states, 3611 states have (on average 2.7781777900858486) internal successors, (10032), 3611 states have internal predecessors, (10032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:02,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3612 states to 3612 states and 10032 transitions. [2020-11-11 15:22:02,761 INFO L78 Accepts]: Start accepts. Automaton has 3612 states and 10032 transitions. Word has length 136 [2020-11-11 15:22:02,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:02,761 INFO L481 AbstractCegarLoop]: Abstraction has 3612 states and 10032 transitions. [2020-11-11 15:22:02,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:02,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3612 states and 10032 transitions. [2020-11-11 15:22:02,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-11 15:22:02,764 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:02,764 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:02,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-11-11 15:22:02,965 INFO L429 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:02,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:02,965 INFO L82 PathProgramCache]: Analyzing trace with hash -541364611, now seen corresponding path program 248 times [2020-11-11 15:22:02,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:02,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955420688] [2020-11-11 15:22:02,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:03,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955420688] [2020-11-11 15:22:03,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264074331] [2020-11-11 15:22:03,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:03,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:22:03,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:03,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:22:03,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:03,819 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:22:03,856 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:03,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:03,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-11 15:22:03,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170074124] [2020-11-11 15:22:03,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:22:03,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:03,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:22:03,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:22:03,874 INFO L87 Difference]: Start difference. First operand 3612 states and 10032 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:07,393 INFO L93 Difference]: Finished difference Result 4651 states and 12350 transitions. [2020-11-11 15:22:07,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-11 15:22:07,395 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2020-11-11 15:22:07,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:07,400 INFO L225 Difference]: With dead ends: 4651 [2020-11-11 15:22:07,400 INFO L226 Difference]: Without dead ends: 4180 [2020-11-11 15:22:07,401 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1634, Invalid=4066, Unknown=0, NotChecked=0, Total=5700 [2020-11-11 15:22:07,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4180 states. [2020-11-11 15:22:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4180 to 2502. [2020-11-11 15:22:07,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2501 states have (on average 2.689324270291883) internal successors, (6726), 2501 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:07,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 6726 transitions. [2020-11-11 15:22:07,440 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 6726 transitions. Word has length 136 [2020-11-11 15:22:07,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:07,440 INFO L481 AbstractCegarLoop]: Abstraction has 2502 states and 6726 transitions. [2020-11-11 15:22:07,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:07,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 6726 transitions. [2020-11-11 15:22:07,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:07,443 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:07,443 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:07,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:07,643 INFO L429 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:07,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:07,644 INFO L82 PathProgramCache]: Analyzing trace with hash 460908696, now seen corresponding path program 249 times [2020-11-11 15:22:07,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:07,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325807640] [2020-11-11 15:22:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:08,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325807640] [2020-11-11 15:22:08,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337365105] [2020-11-11 15:22:08,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:08,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-11 15:22:08,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:08,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:22:08,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:08,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:08,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:08,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:22:08,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398685945] [2020-11-11 15:22:08,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:22:08,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:08,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:22:08,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:22:08,818 INFO L87 Difference]: Start difference. First operand 2502 states and 6726 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:10,513 INFO L93 Difference]: Finished difference Result 3995 states and 9890 transitions. [2020-11-11 15:22:10,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:22:10,515 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:22:10,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:10,519 INFO L225 Difference]: With dead ends: 3995 [2020-11-11 15:22:10,519 INFO L226 Difference]: Without dead ends: 3725 [2020-11-11 15:22:10,519 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=844, Invalid=2348, Unknown=0, NotChecked=0, Total=3192 [2020-11-11 15:22:10,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3725 states. [2020-11-11 15:22:10,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3725 to 2552. [2020-11-11 15:22:10,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.6954135633085063) internal successors, (6876), 2551 states have internal predecessors, (6876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:10,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 6876 transitions. [2020-11-11 15:22:10,556 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 6876 transitions. Word has length 141 [2020-11-11 15:22:10,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:10,556 INFO L481 AbstractCegarLoop]: Abstraction has 2552 states and 6876 transitions. [2020-11-11 15:22:10,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:10,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 6876 transitions. [2020-11-11 15:22:10,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:10,558 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:10,558 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:10,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:10,759 INFO L429 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:10,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:10,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1266805368, now seen corresponding path program 250 times [2020-11-11 15:22:10,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:10,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925663042] [2020-11-11 15:22:10,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:11,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925663042] [2020-11-11 15:22:11,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109532644] [2020-11-11 15:22:11,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:11,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:22:11,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:11,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-11 15:22:11,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:11,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:22:11,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:12,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:12,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-11-11 15:22:12,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196693813] [2020-11-11 15:22:12,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:22:12,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:12,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:22:12,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:22:12,013 INFO L87 Difference]: Start difference. First operand 2552 states and 6876 transitions. Second operand has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:13,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:13,861 INFO L93 Difference]: Finished difference Result 4540 states and 11030 transitions. [2020-11-11 15:22:13,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:22:13,862 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:22:13,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:13,867 INFO L225 Difference]: With dead ends: 4540 [2020-11-11 15:22:13,867 INFO L226 Difference]: Without dead ends: 4270 [2020-11-11 15:22:13,868 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:22:13,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2020-11-11 15:22:13,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 2602. [2020-11-11 15:22:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2602 states, 2601 states have (on average 2.701268742791234) internal successors, (7026), 2601 states have internal predecessors, (7026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:13,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 7026 transitions. [2020-11-11 15:22:13,907 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 7026 transitions. Word has length 141 [2020-11-11 15:22:13,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:13,908 INFO L481 AbstractCegarLoop]: Abstraction has 2602 states and 7026 transitions. [2020-11-11 15:22:13,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:13,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 7026 transitions. [2020-11-11 15:22:13,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:13,910 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:13,910 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:14,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:14,111 INFO L429 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:14,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:14,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2095364310, now seen corresponding path program 251 times [2020-11-11 15:22:14,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:14,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485989411] [2020-11-11 15:22:14,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:15,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485989411] [2020-11-11 15:22:15,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918876600] [2020-11-11 15:22:15,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:15,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-11 15:22:15,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:15,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:22:15,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:15,223 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:15,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:15,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:22:15,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956962572] [2020-11-11 15:22:15,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:22:15,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:15,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:22:15,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:22:15,253 INFO L87 Difference]: Start difference. First operand 2602 states and 7026 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:17,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:17,056 INFO L93 Difference]: Finished difference Result 4545 states and 11090 transitions. [2020-11-11 15:22:17,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:22:17,057 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:22:17,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:17,062 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:22:17,062 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:22:17,063 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=899, Invalid=2641, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:22:17,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:22:17,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 2652. [2020-11-11 15:22:17,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 2.7069030554507734) internal successors, (7176), 2651 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:17,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 7176 transitions. [2020-11-11 15:22:17,104 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 7176 transitions. Word has length 141 [2020-11-11 15:22:17,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:17,104 INFO L481 AbstractCegarLoop]: Abstraction has 2652 states and 7176 transitions. [2020-11-11 15:22:17,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:17,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 7176 transitions. [2020-11-11 15:22:17,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:17,107 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:17,107 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:17,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:17,308 INFO L429 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:17,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:17,309 INFO L82 PathProgramCache]: Analyzing trace with hash 52449734, now seen corresponding path program 252 times [2020-11-11 15:22:17,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:17,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135222405] [2020-11-11 15:22:17,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:18,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135222405] [2020-11-11 15:22:18,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215736260] [2020-11-11 15:22:18,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:18,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-11 15:22:18,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:18,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:22:18,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:18,421 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:22:18,499 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:18,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:18,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-11-11 15:22:18,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067764523] [2020-11-11 15:22:18,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:22:18,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:18,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:22:18,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:22:18,529 INFO L87 Difference]: Start difference. First operand 2652 states and 7176 transitions. Second operand has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:20,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:20,619 INFO L93 Difference]: Finished difference Result 4545 states and 11140 transitions. [2020-11-11 15:22:20,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:22:20,621 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:22:20,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:20,626 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:22:20,626 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:22:20,626 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=922, Invalid=2860, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:22:20,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:22:20,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 2702. [2020-11-11 15:22:20,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2702 states, 2701 states have (on average 2.712328767123288) internal successors, (7326), 2701 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:20,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2702 states to 2702 states and 7326 transitions. [2020-11-11 15:22:20,668 INFO L78 Accepts]: Start accepts. Automaton has 2702 states and 7326 transitions. Word has length 141 [2020-11-11 15:22:20,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:20,668 INFO L481 AbstractCegarLoop]: Abstraction has 2702 states and 7326 transitions. [2020-11-11 15:22:20,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:20,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2702 states and 7326 transitions. [2020-11-11 15:22:20,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:20,671 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:20,671 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:20,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:20,872 INFO L429 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:20,873 INFO L82 PathProgramCache]: Analyzing trace with hash -783409516, now seen corresponding path program 253 times [2020-11-11 15:22:20,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:20,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261775151] [2020-11-11 15:22:20,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:21,749 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:21,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261775151] [2020-11-11 15:22:21,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750575225] [2020-11-11 15:22:21,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:21,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:22:21,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:21,931 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:21,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:21,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:22:21,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442733600] [2020-11-11 15:22:21,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:22:21,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:21,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:22:21,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:22:21,959 INFO L87 Difference]: Start difference. First operand 2702 states and 7326 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:23,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:23,930 INFO L93 Difference]: Finished difference Result 4545 states and 11190 transitions. [2020-11-11 15:22:23,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:22:23,932 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:22:23,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:23,937 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:22:23,937 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:22:23,938 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=930, Invalid=2852, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:22:23,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:22:23,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 2752. [2020-11-11 15:22:23,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2751 states have (on average 2.717557251908397) internal successors, (7476), 2751 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 7476 transitions. [2020-11-11 15:22:23,979 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 7476 transitions. Word has length 141 [2020-11-11 15:22:23,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:23,979 INFO L481 AbstractCegarLoop]: Abstraction has 2752 states and 7476 transitions. [2020-11-11 15:22:23,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:23,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 7476 transitions. [2020-11-11 15:22:23,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:23,982 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:23,982 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:24,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:24,183 INFO L429 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:24,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:24,183 INFO L82 PathProgramCache]: Analyzing trace with hash 899097476, now seen corresponding path program 254 times [2020-11-11 15:22:24,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:24,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87220966] [2020-11-11 15:22:24,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:25,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87220966] [2020-11-11 15:22:25,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51929555] [2020-11-11 15:22:25,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:25,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:22:25,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:25,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:22:25,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:25,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:22:25,352 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:25,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:25,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-11-11 15:22:25,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748070222] [2020-11-11 15:22:25,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:22:25,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:25,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:22:25,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:22:25,380 INFO L87 Difference]: Start difference. First operand 2752 states and 7476 transitions. Second operand has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:27,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:27,698 INFO L93 Difference]: Finished difference Result 4545 states and 11240 transitions. [2020-11-11 15:22:27,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:22:27,700 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:22:27,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:27,705 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:22:27,706 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:22:27,706 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=955, Invalid=3077, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:22:27,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:22:27,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 2802. [2020-11-11 15:22:27,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2801 states have (on average 2.7225990717600856) internal successors, (7626), 2801 states have internal predecessors, (7626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:27,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 7626 transitions. [2020-11-11 15:22:27,749 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 7626 transitions. Word has length 141 [2020-11-11 15:22:27,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:27,749 INFO L481 AbstractCegarLoop]: Abstraction has 2802 states and 7626 transitions. [2020-11-11 15:22:27,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:27,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 7626 transitions. [2020-11-11 15:22:27,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:27,751 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:27,752 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:27,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:27,952 INFO L429 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:27,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:27,953 INFO L82 PathProgramCache]: Analyzing trace with hash -953550382, now seen corresponding path program 255 times [2020-11-11 15:22:27,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:27,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044345587] [2020-11-11 15:22:27,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:28,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044345587] [2020-11-11 15:22:28,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515020500] [2020-11-11 15:22:28,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:28,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-11 15:22:28,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:28,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:22:28,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:29,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:29,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:29,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:22:29,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049276607] [2020-11-11 15:22:29,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:22:29,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:29,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:22:29,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:22:29,038 INFO L87 Difference]: Start difference. First operand 2802 states and 7626 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:31,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:31,130 INFO L93 Difference]: Finished difference Result 4545 states and 11290 transitions. [2020-11-11 15:22:31,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:22:31,131 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:22:31,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:31,136 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:22:31,136 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:22:31,137 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=977, Invalid=3055, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:22:31,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:22:31,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 2852. [2020-11-11 15:22:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2851 states have (on average 2.7274640477025605) internal successors, (7776), 2851 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:31,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 7776 transitions. [2020-11-11 15:22:31,179 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 7776 transitions. Word has length 141 [2020-11-11 15:22:31,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:31,179 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 7776 transitions. [2020-11-11 15:22:31,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:31,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 7776 transitions. [2020-11-11 15:22:31,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:31,182 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:31,182 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:31,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2020-11-11 15:22:31,383 INFO L429 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:31,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:31,383 INFO L82 PathProgramCache]: Analyzing trace with hash -887657790, now seen corresponding path program 256 times [2020-11-11 15:22:31,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:31,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603404377] [2020-11-11 15:22:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:32,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603404377] [2020-11-11 15:22:32,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214648402] [2020-11-11 15:22:32,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:32,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:22:32,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:32,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-11 15:22:32,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:32,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:22:32,506 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:32,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:32,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-11-11 15:22:32,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757397247] [2020-11-11 15:22:32,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:22:32,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:32,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:22:32,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:22:32,532 INFO L87 Difference]: Start difference. First operand 2852 states and 7776 transitions. Second operand has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:35,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:35,025 INFO L93 Difference]: Finished difference Result 4545 states and 11340 transitions. [2020-11-11 15:22:35,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:22:35,027 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:22:35,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:35,032 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:22:35,032 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:22:35,033 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1004, Invalid=3286, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:22:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:22:35,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 2902. [2020-11-11 15:22:35,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2901 states have (on average 2.7321613236814892) internal successors, (7926), 2901 states have internal predecessors, (7926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:35,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 7926 transitions. [2020-11-11 15:22:35,078 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 7926 transitions. Word has length 141 [2020-11-11 15:22:35,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:35,078 INFO L481 AbstractCegarLoop]: Abstraction has 2902 states and 7926 transitions. [2020-11-11 15:22:35,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:35,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 7926 transitions. [2020-11-11 15:22:35,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:35,080 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:35,080 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:35,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:35,281 INFO L429 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:35,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:35,282 INFO L82 PathProgramCache]: Analyzing trace with hash -813356400, now seen corresponding path program 257 times [2020-11-11 15:22:35,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:35,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649211439] [2020-11-11 15:22:35,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:36,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649211439] [2020-11-11 15:22:36,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817093742] [2020-11-11 15:22:36,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:36,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-11 15:22:36,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:36,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:22:36,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:36,305 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:36,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:36,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:22:36,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281133781] [2020-11-11 15:22:36,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:22:36,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:36,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:22:36,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:22:36,332 INFO L87 Difference]: Start difference. First operand 2902 states and 7926 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:38,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:38,621 INFO L93 Difference]: Finished difference Result 4545 states and 11390 transitions. [2020-11-11 15:22:38,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:22:38,623 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:22:38,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:38,627 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:22:38,628 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:22:38,628 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1040, Invalid=3250, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:22:38,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:22:38,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 2952. [2020-11-11 15:22:38,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 2.7366994239240934) internal successors, (8076), 2951 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:38,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 8076 transitions. [2020-11-11 15:22:38,673 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 8076 transitions. Word has length 141 [2020-11-11 15:22:38,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:38,674 INFO L481 AbstractCegarLoop]: Abstraction has 2952 states and 8076 transitions. [2020-11-11 15:22:38,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:38,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 8076 transitions. [2020-11-11 15:22:38,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:38,676 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:38,676 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:38,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2020-11-11 15:22:38,877 INFO L429 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:38,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:38,878 INFO L82 PathProgramCache]: Analyzing trace with hash -177338496, now seen corresponding path program 258 times [2020-11-11 15:22:38,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:38,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976897301] [2020-11-11 15:22:38,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:39,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976897301] [2020-11-11 15:22:39,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211062778] [2020-11-11 15:22:39,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:39,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-11 15:22:39,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:39,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:22:39,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:39,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:22:40,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:40,096 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:40,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:40,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-11-11 15:22:40,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615321557] [2020-11-11 15:22:40,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:22:40,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:40,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:22:40,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:22:40,098 INFO L87 Difference]: Start difference. First operand 2952 states and 8076 transitions. Second operand has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:42,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:42,791 INFO L93 Difference]: Finished difference Result 4545 states and 11440 transitions. [2020-11-11 15:22:42,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 15:22:42,793 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:22:42,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:42,798 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:22:42,798 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:22:42,799 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1069, Invalid=3487, Unknown=0, NotChecked=0, Total=4556 [2020-11-11 15:22:42,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:22:42,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3002. [2020-11-11 15:22:42,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 2.741086304565145) internal successors, (8226), 3001 states have internal predecessors, (8226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:42,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 8226 transitions. [2020-11-11 15:22:42,845 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 8226 transitions. Word has length 141 [2020-11-11 15:22:42,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:42,845 INFO L481 AbstractCegarLoop]: Abstraction has 3002 states and 8226 transitions. [2020-11-11 15:22:42,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:42,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 8226 transitions. [2020-11-11 15:22:42,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:42,848 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:42,848 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:43,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-11-11 15:22:43,048 INFO L429 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:43,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:43,049 INFO L82 PathProgramCache]: Analyzing trace with hash -66809650, now seen corresponding path program 259 times [2020-11-11 15:22:43,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:43,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460884482] [2020-11-11 15:22:43,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:43,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460884482] [2020-11-11 15:22:43,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915893806] [2020-11-11 15:22:43,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:43,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:22:43,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:44,063 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:44,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:44,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:22:44,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075177328] [2020-11-11 15:22:44,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:22:44,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:44,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:22:44,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:22:44,089 INFO L87 Difference]: Start difference. First operand 3002 states and 8226 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:46,519 INFO L93 Difference]: Finished difference Result 4545 states and 11490 transitions. [2020-11-11 15:22:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 15:22:46,521 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:22:46,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:46,526 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:22:46,526 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:22:46,527 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1119, Invalid=3437, Unknown=0, NotChecked=0, Total=4556 [2020-11-11 15:22:46,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:22:46,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3052. [2020-11-11 15:22:46,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3052 states, 3051 states have (on average 2.745329400196657) internal successors, (8376), 3051 states have internal predecessors, (8376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:46,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 8376 transitions. [2020-11-11 15:22:46,573 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 8376 transitions. Word has length 141 [2020-11-11 15:22:46,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:46,574 INFO L481 AbstractCegarLoop]: Abstraction has 3052 states and 8376 transitions. [2020-11-11 15:22:46,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:46,574 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 8376 transitions. [2020-11-11 15:22:46,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:46,576 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:46,576 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:46,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:46,777 INFO L429 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:46,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:46,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1996478910, now seen corresponding path program 260 times [2020-11-11 15:22:46,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:46,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278394165] [2020-11-11 15:22:46,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:47,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278394165] [2020-11-11 15:22:47,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51941492] [2020-11-11 15:22:47,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:47,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:22:47,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:47,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:22:47,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:47,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:22:47,887 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:47,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:47,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-11-11 15:22:47,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758958957] [2020-11-11 15:22:47,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:22:47,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:47,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:22:47,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:22:47,912 INFO L87 Difference]: Start difference. First operand 3052 states and 8376 transitions. Second operand has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:50,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:50,896 INFO L93 Difference]: Finished difference Result 4545 states and 11540 transitions. [2020-11-11 15:22:50,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-11 15:22:50,898 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:22:50,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:50,903 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:22:50,903 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:22:50,904 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1150, Invalid=3680, Unknown=0, NotChecked=0, Total=4830 [2020-11-11 15:22:50,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:22:50,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3102. [2020-11-11 15:22:50,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3101 states have (on average 2.749435665914221) internal successors, (8526), 3101 states have internal predecessors, (8526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:50,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 8526 transitions. [2020-11-11 15:22:50,952 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 8526 transitions. Word has length 141 [2020-11-11 15:22:50,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:50,952 INFO L481 AbstractCegarLoop]: Abstraction has 3102 states and 8526 transitions. [2020-11-11 15:22:50,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 8526 transitions. [2020-11-11 15:22:50,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:50,955 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:50,955 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:51,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2020-11-11 15:22:51,155 INFO L429 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:51,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:51,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1558514828, now seen corresponding path program 261 times [2020-11-11 15:22:51,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:51,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736276976] [2020-11-11 15:22:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:51,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736276976] [2020-11-11 15:22:51,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78276305] [2020-11-11 15:22:51,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:52,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-11 15:22:52,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:52,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:22:52,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:52,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:52,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:52,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:22:52,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061004753] [2020-11-11 15:22:52,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:22:52,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:52,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:22:52,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:22:52,221 INFO L87 Difference]: Start difference. First operand 3102 states and 8526 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:54,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:54,828 INFO L93 Difference]: Finished difference Result 4545 states and 11590 transitions. [2020-11-11 15:22:54,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 15:22:54,830 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:22:54,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:54,836 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:22:54,836 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:22:54,837 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1214, Invalid=3616, Unknown=0, NotChecked=0, Total=4830 [2020-11-11 15:22:54,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:22:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3152. [2020-11-11 15:22:54,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3152 states, 3151 states have (on average 2.753411615360203) internal successors, (8676), 3151 states have internal predecessors, (8676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:54,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 8676 transitions. [2020-11-11 15:22:54,886 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 8676 transitions. Word has length 141 [2020-11-11 15:22:54,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:54,886 INFO L481 AbstractCegarLoop]: Abstraction has 3152 states and 8676 transitions. [2020-11-11 15:22:54,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:54,886 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 8676 transitions. [2020-11-11 15:22:54,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:54,889 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:54,889 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:55,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:55,089 INFO L429 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:55,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:55,090 INFO L82 PathProgramCache]: Analyzing trace with hash 13222268, now seen corresponding path program 262 times [2020-11-11 15:22:55,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:55,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523487569] [2020-11-11 15:22:55,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:22:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:55,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523487569] [2020-11-11 15:22:55,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718725342] [2020-11-11 15:22:55,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:56,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:22:56,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:22:56,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-11 15:22:56,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:22:56,158 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:22:56,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:22:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:22:56,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:22:56,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-11-11 15:22:56,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141375702] [2020-11-11 15:22:56,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:22:56,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:22:56,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:22:56,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:22:56,313 INFO L87 Difference]: Start difference. First operand 3152 states and 8676 transitions. Second operand has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:59,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:22:59,564 INFO L93 Difference]: Finished difference Result 4545 states and 11640 transitions. [2020-11-11 15:22:59,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-11 15:22:59,566 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:22:59,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:22:59,571 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:22:59,572 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:22:59,572 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1247, Invalid=3865, Unknown=0, NotChecked=0, Total=5112 [2020-11-11 15:22:59,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:22:59,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3202. [2020-11-11 15:22:59,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3202 states, 3201 states have (on average 2.7572633552014993) internal successors, (8826), 3201 states have internal predecessors, (8826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3202 states to 3202 states and 8826 transitions. [2020-11-11 15:22:59,622 INFO L78 Accepts]: Start accepts. Automaton has 3202 states and 8826 transitions. Word has length 141 [2020-11-11 15:22:59,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:22:59,623 INFO L481 AbstractCegarLoop]: Abstraction has 3202 states and 8826 transitions. [2020-11-11 15:22:59,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:22:59,623 INFO L276 IsEmpty]: Start isEmpty. Operand 3202 states and 8826 transitions. [2020-11-11 15:22:59,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:22:59,625 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:22:59,626 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:22:59,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:22:59,826 INFO L429 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:22:59,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:22:59,827 INFO L82 PathProgramCache]: Analyzing trace with hash -553943606, now seen corresponding path program 263 times [2020-11-11 15:22:59,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:22:59,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300306326] [2020-11-11 15:22:59,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:22:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:00,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300306326] [2020-11-11 15:23:00,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681368667] [2020-11-11 15:23:00,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:00,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-11 15:23:00,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:00,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:23:00,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:00,839 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:00,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:00,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:23:00,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860124939] [2020-11-11 15:23:00,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:23:00,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:00,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:23:00,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:23:00,862 INFO L87 Difference]: Start difference. First operand 3202 states and 8826 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:03,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:03,641 INFO L93 Difference]: Finished difference Result 4545 states and 11690 transitions. [2020-11-11 15:23:03,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-11 15:23:03,643 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:23:03,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:03,649 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:23:03,649 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:23:03,649 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1325, Invalid=3787, Unknown=0, NotChecked=0, Total=5112 [2020-11-11 15:23:03,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:23:03,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3252. [2020-11-11 15:23:03,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3252 states, 3251 states have (on average 2.7609966164257154) internal successors, (8976), 3251 states have internal predecessors, (8976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:03,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3252 states to 3252 states and 8976 transitions. [2020-11-11 15:23:03,700 INFO L78 Accepts]: Start accepts. Automaton has 3252 states and 8976 transitions. Word has length 141 [2020-11-11 15:23:03,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:03,700 INFO L481 AbstractCegarLoop]: Abstraction has 3252 states and 8976 transitions. [2020-11-11 15:23:03,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:03,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3252 states and 8976 transitions. [2020-11-11 15:23:03,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:23:03,703 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:03,703 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:03,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:03,904 INFO L429 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:03,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:03,904 INFO L82 PathProgramCache]: Analyzing trace with hash 274767546, now seen corresponding path program 264 times [2020-11-11 15:23:03,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:03,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019309629] [2020-11-11 15:23:03,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:04,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019309629] [2020-11-11 15:23:04,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263384166] [2020-11-11 15:23:04,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:04,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-11 15:23:04,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:04,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:23:04,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:04,935 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:23:05,023 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:05,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:05,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-11-11 15:23:05,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739741568] [2020-11-11 15:23:05,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:23:05,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:05,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:23:05,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:23:05,046 INFO L87 Difference]: Start difference. First operand 3252 states and 8976 transitions. Second operand has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:08,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:08,467 INFO L93 Difference]: Finished difference Result 4545 states and 11740 transitions. [2020-11-11 15:23:08,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-11 15:23:08,469 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:23:08,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:08,474 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:23:08,474 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:23:08,475 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1360, Invalid=4042, Unknown=0, NotChecked=0, Total=5402 [2020-11-11 15:23:08,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:23:08,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3302. [2020-11-11 15:23:08,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3302 states, 3301 states have (on average 2.764616782793093) internal successors, (9126), 3301 states have internal predecessors, (9126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:08,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3302 states to 3302 states and 9126 transitions. [2020-11-11 15:23:08,524 INFO L78 Accepts]: Start accepts. Automaton has 3302 states and 9126 transitions. Word has length 141 [2020-11-11 15:23:08,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:08,524 INFO L481 AbstractCegarLoop]: Abstraction has 3302 states and 9126 transitions. [2020-11-11 15:23:08,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:08,525 INFO L276 IsEmpty]: Start isEmpty. Operand 3302 states and 9126 transitions. [2020-11-11 15:23:08,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:23:08,529 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:08,529 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:08,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:08,742 INFO L429 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:08,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:08,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1447771000, now seen corresponding path program 265 times [2020-11-11 15:23:08,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:08,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667556880] [2020-11-11 15:23:08,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:09,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667556880] [2020-11-11 15:23:09,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208037390] [2020-11-11 15:23:09,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:09,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:23:09,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:09,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:09,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:09,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:23:09,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611844492] [2020-11-11 15:23:09,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:23:09,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:09,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:23:09,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:23:09,780 INFO L87 Difference]: Start difference. First operand 3302 states and 9126 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:12,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:12,715 INFO L93 Difference]: Finished difference Result 4545 states and 11790 transitions. [2020-11-11 15:23:12,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-11 15:23:12,717 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:23:12,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:12,722 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:23:12,723 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:23:12,723 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1452, Invalid=3950, Unknown=0, NotChecked=0, Total=5402 [2020-11-11 15:23:12,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:23:12,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3352. [2020-11-11 15:23:12,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3351 states have (on average 2.7681289167412713) internal successors, (9276), 3351 states have internal predecessors, (9276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 9276 transitions. [2020-11-11 15:23:12,774 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 9276 transitions. Word has length 141 [2020-11-11 15:23:12,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:12,774 INFO L481 AbstractCegarLoop]: Abstraction has 3352 states and 9276 transitions. [2020-11-11 15:23:12,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 9276 transitions. [2020-11-11 15:23:12,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:23:12,777 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:12,777 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:12,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2020-11-11 15:23:12,978 INFO L429 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:12,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:12,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1307660664, now seen corresponding path program 266 times [2020-11-11 15:23:12,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:12,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753927380] [2020-11-11 15:23:12,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:13,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753927380] [2020-11-11 15:23:13,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893342682] [2020-11-11 15:23:13,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:13,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:23:13,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:13,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:23:13,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:13,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:23:14,046 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:14,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:14,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-11-11 15:23:14,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705364889] [2020-11-11 15:23:14,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:23:14,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:14,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:23:14,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:23:14,068 INFO L87 Difference]: Start difference. First operand 3352 states and 9276 transitions. Second operand has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:17,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:17,674 INFO L93 Difference]: Finished difference Result 4545 states and 11840 transitions. [2020-11-11 15:23:17,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-11-11 15:23:17,675 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:23:17,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:17,681 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:23:17,681 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:23:17,682 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1489, Invalid=4211, Unknown=0, NotChecked=0, Total=5700 [2020-11-11 15:23:17,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:23:17,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3402. [2020-11-11 15:23:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 2.7715377830049985) internal successors, (9426), 3401 states have internal predecessors, (9426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:17,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 9426 transitions. [2020-11-11 15:23:17,734 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 9426 transitions. Word has length 141 [2020-11-11 15:23:17,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:17,734 INFO L481 AbstractCegarLoop]: Abstraction has 3402 states and 9426 transitions. [2020-11-11 15:23:17,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:17,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 9426 transitions. [2020-11-11 15:23:17,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:23:17,737 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:17,737 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:17,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:17,938 INFO L429 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:17,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:17,938 INFO L82 PathProgramCache]: Analyzing trace with hash -48906042, now seen corresponding path program 267 times [2020-11-11 15:23:17,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:17,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747967998] [2020-11-11 15:23:17,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:18,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747967998] [2020-11-11 15:23:18,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494136561] [2020-11-11 15:23:18,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:18,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-11 15:23:18,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:18,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:23:18,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:18,978 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:18,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:18,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:23:18,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707966912] [2020-11-11 15:23:18,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:23:18,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:18,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:23:18,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:23:18,998 INFO L87 Difference]: Start difference. First operand 3402 states and 9426 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:22,052 INFO L93 Difference]: Finished difference Result 4545 states and 11890 transitions. [2020-11-11 15:23:22,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-11 15:23:22,054 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:23:22,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:22,059 INFO L225 Difference]: With dead ends: 4545 [2020-11-11 15:23:22,059 INFO L226 Difference]: Without dead ends: 4275 [2020-11-11 15:23:22,060 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1595, Invalid=4105, Unknown=0, NotChecked=0, Total=5700 [2020-11-11 15:23:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2020-11-11 15:23:22,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3452. [2020-11-11 15:23:22,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 3451 states have (on average 2.7748478701825556) internal successors, (9576), 3451 states have internal predecessors, (9576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:22,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 9576 transitions. [2020-11-11 15:23:22,115 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 9576 transitions. Word has length 141 [2020-11-11 15:23:22,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:22,115 INFO L481 AbstractCegarLoop]: Abstraction has 3452 states and 9576 transitions. [2020-11-11 15:23:22,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:22,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 9576 transitions. [2020-11-11 15:23:22,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:23:22,118 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:22,118 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:22,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2020-11-11 15:23:22,319 INFO L429 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:22,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:22,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1782626742, now seen corresponding path program 268 times [2020-11-11 15:23:22,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:22,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456068321] [2020-11-11 15:23:22,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:23,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456068321] [2020-11-11 15:23:23,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529377015] [2020-11-11 15:23:23,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:23,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:23:23,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:23,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-11 15:23:23,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:23,304 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:23:23,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:23,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:23,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-11-11 15:23:23,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998991632] [2020-11-11 15:23:23,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:23:23,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:23,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:23:23,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:23:23,443 INFO L87 Difference]: Start difference. First operand 3452 states and 9576 transitions. Second operand has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:27,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:27,247 INFO L93 Difference]: Finished difference Result 4590 states and 12060 transitions. [2020-11-11 15:23:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-11 15:23:27,249 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:23:27,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:27,255 INFO L225 Difference]: With dead ends: 4590 [2020-11-11 15:23:27,256 INFO L226 Difference]: Without dead ends: 4320 [2020-11-11 15:23:27,256 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1657 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1634, Invalid=4372, Unknown=0, NotChecked=0, Total=6006 [2020-11-11 15:23:27,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2020-11-11 15:23:27,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 3502. [2020-11-11 15:23:27,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3502 states, 3501 states have (on average 2.7823479005998286) internal successors, (9741), 3501 states have internal predecessors, (9741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:27,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3502 states to 3502 states and 9741 transitions. [2020-11-11 15:23:27,309 INFO L78 Accepts]: Start accepts. Automaton has 3502 states and 9741 transitions. Word has length 141 [2020-11-11 15:23:27,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:27,310 INFO L481 AbstractCegarLoop]: Abstraction has 3502 states and 9741 transitions. [2020-11-11 15:23:27,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:27,310 INFO L276 IsEmpty]: Start isEmpty. Operand 3502 states and 9741 transitions. [2020-11-11 15:23:27,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:23:27,313 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:27,313 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:27,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-11-11 15:23:27,514 INFO L429 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:27,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:27,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1883549052, now seen corresponding path program 269 times [2020-11-11 15:23:27,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:27,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682477497] [2020-11-11 15:23:27,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:28,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682477497] [2020-11-11 15:23:28,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395096352] [2020-11-11 15:23:28,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:28,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-11 15:23:28,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:28,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:23:28,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:28,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:28,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:28,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:23:28,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927924655] [2020-11-11 15:23:28,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:23:28,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:28,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:23:28,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:23:28,586 INFO L87 Difference]: Start difference. First operand 3502 states and 9741 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:31,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:31,842 INFO L93 Difference]: Finished difference Result 5652 states and 15144 transitions. [2020-11-11 15:23:31,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-11 15:23:31,843 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:23:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:31,850 INFO L225 Difference]: With dead ends: 5652 [2020-11-11 15:23:31,850 INFO L226 Difference]: Without dead ends: 5382 [2020-11-11 15:23:31,851 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1755, Invalid=4251, Unknown=0, NotChecked=0, Total=6006 [2020-11-11 15:23:31,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5382 states. [2020-11-11 15:23:31,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5382 to 3627. [2020-11-11 15:23:31,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 2.7942636514065087) internal successors, (10132), 3626 states have internal predecessors, (10132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:31,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 10132 transitions. [2020-11-11 15:23:31,928 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 10132 transitions. Word has length 141 [2020-11-11 15:23:31,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:31,929 INFO L481 AbstractCegarLoop]: Abstraction has 3627 states and 10132 transitions. [2020-11-11 15:23:31,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:31,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 10132 transitions. [2020-11-11 15:23:31,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-11 15:23:31,932 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:31,932 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:32,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:32,132 INFO L429 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:32,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:32,133 INFO L82 PathProgramCache]: Analyzing trace with hash -172341098, now seen corresponding path program 270 times [2020-11-11 15:23:32,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:32,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683093285] [2020-11-11 15:23:32,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:32,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683093285] [2020-11-11 15:23:32,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776273542] [2020-11-11 15:23:32,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:33,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-11 15:23:33,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:33,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-11 15:23:33,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:33,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:23:33,170 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:33,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:33,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-11 15:23:33,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37902075] [2020-11-11 15:23:33,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-11 15:23:33,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:33,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-11 15:23:33,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:23:33,190 INFO L87 Difference]: Start difference. First operand 3627 states and 10132 transitions. Second operand has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:37,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:37,093 INFO L93 Difference]: Finished difference Result 4666 states and 12450 transitions. [2020-11-11 15:23:37,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-11 15:23:37,095 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2020-11-11 15:23:37,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:37,100 INFO L225 Difference]: With dead ends: 4666 [2020-11-11 15:23:37,101 INFO L226 Difference]: Without dead ends: 4255 [2020-11-11 15:23:37,101 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1743 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1768, Invalid=4394, Unknown=0, NotChecked=0, Total=6162 [2020-11-11 15:23:37,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4255 states. [2020-11-11 15:23:37,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4255 to 2441. [2020-11-11 15:23:37,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 2.6918032786885244) internal successors, (6568), 2440 states have internal predecessors, (6568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:37,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 6568 transitions. [2020-11-11 15:23:37,138 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 6568 transitions. Word has length 141 [2020-11-11 15:23:37,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:37,138 INFO L481 AbstractCegarLoop]: Abstraction has 2441 states and 6568 transitions. [2020-11-11 15:23:37,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.931034482758621) internal successors, (143), 29 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:37,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 6568 transitions. [2020-11-11 15:23:37,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:23:37,140 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:37,140 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:37,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2020-11-11 15:23:37,341 INFO L429 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:37,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:37,342 INFO L82 PathProgramCache]: Analyzing trace with hash -393441758, now seen corresponding path program 271 times [2020-11-11 15:23:37,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:37,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033851387] [2020-11-11 15:23:37,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:38,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033851387] [2020-11-11 15:23:38,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467385352] [2020-11-11 15:23:38,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:38,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-11 15:23:38,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:38,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:38,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:38,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:38,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 33 [2020-11-11 15:23:38,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105316891] [2020-11-11 15:23:38,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-11 15:23:38,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:38,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-11 15:23:38,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:23:38,745 INFO L87 Difference]: Start difference. First operand 2441 states and 6568 transitions. Second operand has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:41,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:41,017 INFO L93 Difference]: Finished difference Result 3809 states and 9752 transitions. [2020-11-11 15:23:41,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:23:41,019 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:23:41,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:41,024 INFO L225 Difference]: With dead ends: 3809 [2020-11-11 15:23:41,024 INFO L226 Difference]: Without dead ends: 3475 [2020-11-11 15:23:41,025 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1064, Invalid=2842, Unknown=0, NotChecked=0, Total=3906 [2020-11-11 15:23:41,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3475 states. [2020-11-11 15:23:41,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3475 to 2526. [2020-11-11 15:23:41,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2526 states, 2525 states have (on average 2.6685148514851487) internal successors, (6738), 2525 states have internal predecessors, (6738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:41,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2526 states to 2526 states and 6738 transitions. [2020-11-11 15:23:41,061 INFO L78 Accepts]: Start accepts. Automaton has 2526 states and 6738 transitions. Word has length 146 [2020-11-11 15:23:41,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:41,061 INFO L481 AbstractCegarLoop]: Abstraction has 2526 states and 6738 transitions. [2020-11-11 15:23:41,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.090909090909091) internal successors, (168), 33 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:41,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2526 states and 6738 transitions. [2020-11-11 15:23:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:23:41,063 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:41,063 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:41,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:41,264 INFO L429 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:41,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:41,265 INFO L82 PathProgramCache]: Analyzing trace with hash -657761712, now seen corresponding path program 272 times [2020-11-11 15:23:41,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:41,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970263335] [2020-11-11 15:23:41,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:42,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970263335] [2020-11-11 15:23:42,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143686205] [2020-11-11 15:23:42,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:42,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:23:42,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:42,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:23:42,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:42,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:42,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:42,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:23:42,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772593646] [2020-11-11 15:23:42,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:23:42,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:42,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:23:42,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:23:42,587 INFO L87 Difference]: Start difference. First operand 2526 states and 6738 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:44,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:44,399 INFO L93 Difference]: Finished difference Result 4760 states and 11420 transitions. [2020-11-11 15:23:44,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:23:44,401 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:23:44,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:44,406 INFO L225 Difference]: With dead ends: 4760 [2020-11-11 15:23:44,406 INFO L226 Difference]: Without dead ends: 4490 [2020-11-11 15:23:44,407 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=894, Invalid=2298, Unknown=0, NotChecked=0, Total=3192 [2020-11-11 15:23:44,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4490 states. [2020-11-11 15:23:44,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4490 to 2627. [2020-11-11 15:23:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 2.6755521706016756) internal successors, (7026), 2626 states have internal predecessors, (7026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:44,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 7026 transitions. [2020-11-11 15:23:44,448 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 7026 transitions. Word has length 146 [2020-11-11 15:23:44,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:44,448 INFO L481 AbstractCegarLoop]: Abstraction has 2627 states and 7026 transitions. [2020-11-11 15:23:44,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:44,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 7026 transitions. [2020-11-11 15:23:44,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:23:44,451 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:44,451 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:44,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:44,651 INFO L429 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:44,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:44,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1800332480, now seen corresponding path program 273 times [2020-11-11 15:23:44,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:44,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399886899] [2020-11-11 15:23:44,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:45,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399886899] [2020-11-11 15:23:45,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322593416] [2020-11-11 15:23:45,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:45,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-11-11 15:23:45,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:45,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:23:45,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:45,978 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:23:46,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:46,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:46,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-11-11 15:23:46,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862273081] [2020-11-11 15:23:46,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-11 15:23:46,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:46,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-11 15:23:46,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:23:46,142 INFO L87 Difference]: Start difference. First operand 2627 states and 7026 transitions. Second operand has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:48,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:48,287 INFO L93 Difference]: Finished difference Result 4695 states and 11340 transitions. [2020-11-11 15:23:48,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:23:48,289 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:23:48,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:48,295 INFO L225 Difference]: With dead ends: 4695 [2020-11-11 15:23:48,295 INFO L226 Difference]: Without dead ends: 4425 [2020-11-11 15:23:48,296 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=971, Invalid=2689, Unknown=0, NotChecked=0, Total=3660 [2020-11-11 15:23:48,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4425 states. [2020-11-11 15:23:48,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4425 to 2677. [2020-11-11 15:23:48,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2677 states, 2676 states have (on average 2.681614349775785) internal successors, (7176), 2676 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:48,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2677 states to 2677 states and 7176 transitions. [2020-11-11 15:23:48,337 INFO L78 Accepts]: Start accepts. Automaton has 2677 states and 7176 transitions. Word has length 146 [2020-11-11 15:23:48,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:48,337 INFO L481 AbstractCegarLoop]: Abstraction has 2677 states and 7176 transitions. [2020-11-11 15:23:48,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:48,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2677 states and 7176 transitions. [2020-11-11 15:23:48,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:23:48,340 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:48,340 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:48,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:48,541 INFO L429 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:48,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:48,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1860799218, now seen corresponding path program 274 times [2020-11-11 15:23:48,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:48,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144683536] [2020-11-11 15:23:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:49,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144683536] [2020-11-11 15:23:49,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241090207] [2020-11-11 15:23:49,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:49,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:23:49,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:49,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-11 15:23:49,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:49,760 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:49,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:49,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:23:49,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070659558] [2020-11-11 15:23:49,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:23:49,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:49,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:23:49,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:23:49,793 INFO L87 Difference]: Start difference. First operand 2677 states and 7176 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:51,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:51,680 INFO L93 Difference]: Finished difference Result 4720 states and 11440 transitions. [2020-11-11 15:23:51,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:23:51,682 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:23:51,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:51,688 INFO L225 Difference]: With dead ends: 4720 [2020-11-11 15:23:51,688 INFO L226 Difference]: Without dead ends: 4450 [2020-11-11 15:23:51,688 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=894, Invalid=2528, Unknown=0, NotChecked=0, Total=3422 [2020-11-11 15:23:51,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2020-11-11 15:23:51,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 2727. [2020-11-11 15:23:51,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 2.687454145267792) internal successors, (7326), 2726 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 7326 transitions. [2020-11-11 15:23:51,730 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 7326 transitions. Word has length 146 [2020-11-11 15:23:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:51,730 INFO L481 AbstractCegarLoop]: Abstraction has 2727 states and 7326 transitions. [2020-11-11 15:23:51,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 7326 transitions. [2020-11-11 15:23:51,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:23:51,732 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:51,732 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:51,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:51,933 INFO L429 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:51,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:51,934 INFO L82 PathProgramCache]: Analyzing trace with hash 706454014, now seen corresponding path program 275 times [2020-11-11 15:23:51,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:51,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955249049] [2020-11-11 15:23:51,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:53,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955249049] [2020-11-11 15:23:53,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932483256] [2020-11-11 15:23:53,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:53,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-11 15:23:53,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:53,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:23:53,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:53,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:23:53,265 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:53,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:53,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-11-11 15:23:53,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419405887] [2020-11-11 15:23:53,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-11 15:23:53,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:53,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-11 15:23:53,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:23:53,297 INFO L87 Difference]: Start difference. First operand 2727 states and 7326 transitions. Second operand has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:55,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:55,580 INFO L93 Difference]: Finished difference Result 4720 states and 11490 transitions. [2020-11-11 15:23:55,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:23:55,582 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:23:55,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:55,588 INFO L225 Difference]: With dead ends: 4720 [2020-11-11 15:23:55,588 INFO L226 Difference]: Without dead ends: 4450 [2020-11-11 15:23:55,589 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=979, Invalid=2927, Unknown=0, NotChecked=0, Total=3906 [2020-11-11 15:23:55,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2020-11-11 15:23:55,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 2777. [2020-11-11 15:23:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2777 states, 2776 states have (on average 2.6930835734870318) internal successors, (7476), 2776 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:55,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 7476 transitions. [2020-11-11 15:23:55,631 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 7476 transitions. Word has length 146 [2020-11-11 15:23:55,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:55,631 INFO L481 AbstractCegarLoop]: Abstraction has 2777 states and 7476 transitions. [2020-11-11 15:23:55,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:55,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 7476 transitions. [2020-11-11 15:23:55,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:23:55,633 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:55,633 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:55,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:55,834 INFO L429 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:55,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:55,835 INFO L82 PathProgramCache]: Analyzing trace with hash -226343604, now seen corresponding path program 276 times [2020-11-11 15:23:55,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:55,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963007686] [2020-11-11 15:23:55,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:23:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:56,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963007686] [2020-11-11 15:23:56,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179410605] [2020-11-11 15:23:56,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:23:56,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-11 15:23:56,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:23:56,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:23:56,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:23:57,045 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:23:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:23:57,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:23:57,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:23:57,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61464815] [2020-11-11 15:23:57,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:23:57,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:23:57,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:23:57,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:23:57,077 INFO L87 Difference]: Start difference. First operand 2777 states and 7476 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:59,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:23:59,149 INFO L93 Difference]: Finished difference Result 4720 states and 11540 transitions. [2020-11-11 15:23:59,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:23:59,151 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:23:59,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:23:59,157 INFO L225 Difference]: With dead ends: 4720 [2020-11-11 15:23:59,157 INFO L226 Difference]: Without dead ends: 4450 [2020-11-11 15:23:59,158 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=910, Invalid=2750, Unknown=0, NotChecked=0, Total=3660 [2020-11-11 15:23:59,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2020-11-11 15:23:59,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 2827. [2020-11-11 15:23:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2826 states have (on average 2.6985138004246285) internal successors, (7626), 2826 states have internal predecessors, (7626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:59,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 7626 transitions. [2020-11-11 15:23:59,201 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 7626 transitions. Word has length 146 [2020-11-11 15:23:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:23:59,201 INFO L481 AbstractCegarLoop]: Abstraction has 2827 states and 7626 transitions. [2020-11-11 15:23:59,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:23:59,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 7626 transitions. [2020-11-11 15:23:59,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:23:59,203 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:23:59,203 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:23:59,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-11-11 15:23:59,404 INFO L429 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:23:59,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:23:59,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2025709116, now seen corresponding path program 277 times [2020-11-11 15:23:59,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:23:59,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520548740] [2020-11-11 15:23:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:23:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:00,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520548740] [2020-11-11 15:24:00,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194441601] [2020-11-11 15:24:00,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:00,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:00,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:00,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:24:00,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:00,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:00,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-11-11 15:24:00,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485035790] [2020-11-11 15:24:00,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-11 15:24:00,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:00,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-11 15:24:00,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:24:00,728 INFO L87 Difference]: Start difference. First operand 2827 states and 7626 transitions. Second operand has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:03,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:03,185 INFO L93 Difference]: Finished difference Result 4720 states and 11590 transitions. [2020-11-11 15:24:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:24:03,187 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:24:03,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:03,192 INFO L225 Difference]: With dead ends: 4720 [2020-11-11 15:24:03,192 INFO L226 Difference]: Without dead ends: 4450 [2020-11-11 15:24:03,193 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1003, Invalid=3157, Unknown=0, NotChecked=0, Total=4160 [2020-11-11 15:24:03,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2020-11-11 15:24:03,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 2877. [2020-11-11 15:24:03,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2877 states, 2876 states have (on average 2.7037552155771905) internal successors, (7776), 2876 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 7776 transitions. [2020-11-11 15:24:03,238 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 7776 transitions. Word has length 146 [2020-11-11 15:24:03,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:03,238 INFO L481 AbstractCegarLoop]: Abstraction has 2877 states and 7776 transitions. [2020-11-11 15:24:03,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:03,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 7776 transitions. [2020-11-11 15:24:03,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:03,240 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:03,240 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:03,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-11-11 15:24:03,442 INFO L429 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:03,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:03,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1189849866, now seen corresponding path program 278 times [2020-11-11 15:24:03,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:03,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291288701] [2020-11-11 15:24:03,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:04,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291288701] [2020-11-11 15:24:04,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505654167] [2020-11-11 15:24:04,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:04,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:24:04,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:04,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:04,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:04,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:04,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:04,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:24:04,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488876598] [2020-11-11 15:24:04,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:24:04,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:04,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:24:04,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:24:04,657 INFO L87 Difference]: Start difference. First operand 2877 states and 7776 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:06,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:06,851 INFO L93 Difference]: Finished difference Result 4720 states and 11640 transitions. [2020-11-11 15:24:06,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:24:06,853 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:24:06,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:06,858 INFO L225 Difference]: With dead ends: 4720 [2020-11-11 15:24:06,859 INFO L226 Difference]: Without dead ends: 4450 [2020-11-11 15:24:06,859 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=942, Invalid=2964, Unknown=0, NotChecked=0, Total=3906 [2020-11-11 15:24:06,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2020-11-11 15:24:06,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 2927. [2020-11-11 15:24:06,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2926 states have (on average 2.7088174982911823) internal successors, (7926), 2926 states have internal predecessors, (7926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 7926 transitions. [2020-11-11 15:24:06,904 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 7926 transitions. Word has length 146 [2020-11-11 15:24:06,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:06,904 INFO L481 AbstractCegarLoop]: Abstraction has 2927 states and 7926 transitions. [2020-11-11 15:24:06,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:06,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 7926 transitions. [2020-11-11 15:24:06,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:06,907 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:06,907 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:07,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-11-11 15:24:07,108 INFO L429 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:07,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:07,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1422610438, now seen corresponding path program 279 times [2020-11-11 15:24:07,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:07,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406653430] [2020-11-11 15:24:07,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:08,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406653430] [2020-11-11 15:24:08,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958408787] [2020-11-11 15:24:08,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:08,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-11-11 15:24:08,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:08,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:08,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:08,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:24:08,379 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:08,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:08,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-11-11 15:24:08,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422367804] [2020-11-11 15:24:08,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-11 15:24:08,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:08,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-11 15:24:08,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:24:08,431 INFO L87 Difference]: Start difference. First operand 2927 states and 7926 transitions. Second operand has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:11,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:11,087 INFO L93 Difference]: Finished difference Result 4720 states and 11690 transitions. [2020-11-11 15:24:11,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:24:11,089 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:24:11,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:11,095 INFO L225 Difference]: With dead ends: 4720 [2020-11-11 15:24:11,095 INFO L226 Difference]: Without dead ends: 4450 [2020-11-11 15:24:11,096 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1043, Invalid=3379, Unknown=0, NotChecked=0, Total=4422 [2020-11-11 15:24:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2020-11-11 15:24:11,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 2977. [2020-11-11 15:24:11,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 2.713709677419355) internal successors, (8076), 2976 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 8076 transitions. [2020-11-11 15:24:11,143 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 8076 transitions. Word has length 146 [2020-11-11 15:24:11,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:11,143 INFO L481 AbstractCegarLoop]: Abstraction has 2977 states and 8076 transitions. [2020-11-11 15:24:11,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:11,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 8076 transitions. [2020-11-11 15:24:11,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:11,146 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:11,146 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:11,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2020-11-11 15:24:11,346 INFO L429 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:11,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:11,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1019709000, now seen corresponding path program 280 times [2020-11-11 15:24:11,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:11,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752679525] [2020-11-11 15:24:11,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:12,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752679525] [2020-11-11 15:24:12,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597721489] [2020-11-11 15:24:12,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:12,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:24:12,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:12,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-11 15:24:12,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:12,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:12,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:12,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:24:12,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497242043] [2020-11-11 15:24:12,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:24:12,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:12,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:24:12,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:24:12,537 INFO L87 Difference]: Start difference. First operand 2977 states and 8076 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:14,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:14,970 INFO L93 Difference]: Finished difference Result 4720 states and 11740 transitions. [2020-11-11 15:24:14,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:24:14,972 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:24:14,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:14,978 INFO L225 Difference]: With dead ends: 4720 [2020-11-11 15:24:14,978 INFO L226 Difference]: Without dead ends: 4450 [2020-11-11 15:24:14,978 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=990, Invalid=3170, Unknown=0, NotChecked=0, Total=4160 [2020-11-11 15:24:14,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2020-11-11 15:24:15,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3027. [2020-11-11 15:24:15,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3027 states, 3026 states have (on average 2.7184401850627893) internal successors, (8226), 3026 states have internal predecessors, (8226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:15,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3027 states to 3027 states and 8226 transitions. [2020-11-11 15:24:15,025 INFO L78 Accepts]: Start accepts. Automaton has 3027 states and 8226 transitions. Word has length 146 [2020-11-11 15:24:15,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:15,025 INFO L481 AbstractCegarLoop]: Abstraction has 3027 states and 8226 transitions. [2020-11-11 15:24:15,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3027 states and 8226 transitions. [2020-11-11 15:24:15,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:15,028 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:15,028 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:15,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:15,229 INFO L429 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:15,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:15,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1085601592, now seen corresponding path program 281 times [2020-11-11 15:24:15,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:15,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643373606] [2020-11-11 15:24:15,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:15,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:16,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643373606] [2020-11-11 15:24:16,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447833964] [2020-11-11 15:24:16,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:16,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-11 15:24:16,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:16,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:16,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:16,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:24:16,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:16,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:16,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-11-11 15:24:16,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99588839] [2020-11-11 15:24:16,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-11 15:24:16,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:16,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-11 15:24:16,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:24:16,521 INFO L87 Difference]: Start difference. First operand 3027 states and 8226 transitions. Second operand has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:19,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:19,562 INFO L93 Difference]: Finished difference Result 4720 states and 11790 transitions. [2020-11-11 15:24:19,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 15:24:19,564 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:24:19,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:19,569 INFO L225 Difference]: With dead ends: 4720 [2020-11-11 15:24:19,569 INFO L226 Difference]: Without dead ends: 4450 [2020-11-11 15:24:19,570 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1099, Invalid=3593, Unknown=0, NotChecked=0, Total=4692 [2020-11-11 15:24:19,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2020-11-11 15:24:19,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3077. [2020-11-11 15:24:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 2.7230169050715216) internal successors, (8376), 3076 states have internal predecessors, (8376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 8376 transitions. [2020-11-11 15:24:19,617 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 8376 transitions. Word has length 146 [2020-11-11 15:24:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:19,617 INFO L481 AbstractCegarLoop]: Abstraction has 3077 states and 8376 transitions. [2020-11-11 15:24:19,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:19,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 8376 transitions. [2020-11-11 15:24:19,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:19,620 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:19,620 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:19,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:19,820 INFO L429 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:19,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:19,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1159902982, now seen corresponding path program 282 times [2020-11-11 15:24:19,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:19,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373182425] [2020-11-11 15:24:19,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:20,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373182425] [2020-11-11 15:24:20,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962919350] [2020-11-11 15:24:20,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:20,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-11 15:24:20,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:20,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:20,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:20,956 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:20,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:20,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:24:20,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679474168] [2020-11-11 15:24:20,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:24:20,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:20,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:24:20,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:24:20,984 INFO L87 Difference]: Start difference. First operand 3077 states and 8376 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:23,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:23,539 INFO L93 Difference]: Finished difference Result 4720 states and 11840 transitions. [2020-11-11 15:24:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:24:23,541 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:24:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:23,547 INFO L225 Difference]: With dead ends: 4720 [2020-11-11 15:24:23,547 INFO L226 Difference]: Without dead ends: 4450 [2020-11-11 15:24:23,548 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1054, Invalid=3368, Unknown=0, NotChecked=0, Total=4422 [2020-11-11 15:24:23,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2020-11-11 15:24:23,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3127. [2020-11-11 15:24:23,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3127 states, 3126 states have (on average 2.727447216890595) internal successors, (8526), 3126 states have internal predecessors, (8526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:23,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3127 states to 3127 states and 8526 transitions. [2020-11-11 15:24:23,616 INFO L78 Accepts]: Start accepts. Automaton has 3127 states and 8526 transitions. Word has length 146 [2020-11-11 15:24:23,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:23,616 INFO L481 AbstractCegarLoop]: Abstraction has 3127 states and 8526 transitions. [2020-11-11 15:24:23,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:23,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3127 states and 8526 transitions. [2020-11-11 15:24:23,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:23,619 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:23,619 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:23,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:23,819 INFO L429 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:23,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:23,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1795920886, now seen corresponding path program 283 times [2020-11-11 15:24:23,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:23,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727186675] [2020-11-11 15:24:23,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:24,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727186675] [2020-11-11 15:24:24,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673637822] [2020-11-11 15:24:24,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:24,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:24,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:24,934 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:24:25,029 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:25,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:25,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-11-11 15:24:25,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451257872] [2020-11-11 15:24:25,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-11 15:24:25,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:25,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-11 15:24:25,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:24:25,057 INFO L87 Difference]: Start difference. First operand 3127 states and 8526 transitions. Second operand has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:28,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:28,246 INFO L93 Difference]: Finished difference Result 4720 states and 11890 transitions. [2020-11-11 15:24:28,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-11 15:24:28,248 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:24:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:28,254 INFO L225 Difference]: With dead ends: 4720 [2020-11-11 15:24:28,254 INFO L226 Difference]: Without dead ends: 4450 [2020-11-11 15:24:28,254 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1171, Invalid=3799, Unknown=0, NotChecked=0, Total=4970 [2020-11-11 15:24:28,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2020-11-11 15:24:28,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3177. [2020-11-11 15:24:28,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 3176 states have (on average 2.7317380352644838) internal successors, (8676), 3176 states have internal predecessors, (8676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 8676 transitions. [2020-11-11 15:24:28,303 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 8676 transitions. Word has length 146 [2020-11-11 15:24:28,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:28,303 INFO L481 AbstractCegarLoop]: Abstraction has 3177 states and 8676 transitions. [2020-11-11 15:24:28,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:28,303 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 8676 transitions. [2020-11-11 15:24:28,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:28,306 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:28,306 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:28,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:28,506 INFO L429 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:28,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:28,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1906449732, now seen corresponding path program 284 times [2020-11-11 15:24:28,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:28,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44326567] [2020-11-11 15:24:28,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:29,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44326567] [2020-11-11 15:24:29,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476611796] [2020-11-11 15:24:29,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:29,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:24:29,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:29,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:29,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:29,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:29,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:29,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:24:29,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615251465] [2020-11-11 15:24:29,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:24:29,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:29,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:24:29,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:24:29,645 INFO L87 Difference]: Start difference. First operand 3177 states and 8676 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:32,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:32,363 INFO L93 Difference]: Finished difference Result 4720 states and 11940 transitions. [2020-11-11 15:24:32,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 15:24:32,365 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:24:32,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:32,370 INFO L225 Difference]: With dead ends: 4720 [2020-11-11 15:24:32,370 INFO L226 Difference]: Without dead ends: 4450 [2020-11-11 15:24:32,371 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1134, Invalid=3558, Unknown=0, NotChecked=0, Total=4692 [2020-11-11 15:24:32,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2020-11-11 15:24:32,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3227. [2020-11-11 15:24:32,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3227 states, 3226 states have (on average 2.735895846249225) internal successors, (8826), 3226 states have internal predecessors, (8826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:32,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 8826 transitions. [2020-11-11 15:24:32,422 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 8826 transitions. Word has length 146 [2020-11-11 15:24:32,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:32,423 INFO L481 AbstractCegarLoop]: Abstraction has 3227 states and 8826 transitions. [2020-11-11 15:24:32,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:32,423 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 8826 transitions. [2020-11-11 15:24:32,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:32,427 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:32,427 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:32,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable295 [2020-11-11 15:24:32,642 INFO L429 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:32,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:32,643 INFO L82 PathProgramCache]: Analyzing trace with hash -325229004, now seen corresponding path program 285 times [2020-11-11 15:24:32,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:32,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411850422] [2020-11-11 15:24:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:33,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411850422] [2020-11-11 15:24:33,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156073164] [2020-11-11 15:24:33,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:33,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-11-11 15:24:33,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:33,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:33,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:33,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:24:33,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:33,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:33,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-11-11 15:24:33,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58558370] [2020-11-11 15:24:33,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-11 15:24:33,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:33,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-11 15:24:33,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:24:33,872 INFO L87 Difference]: Start difference. First operand 3227 states and 8826 transitions. Second operand has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:37,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:37,301 INFO L93 Difference]: Finished difference Result 4720 states and 11990 transitions. [2020-11-11 15:24:37,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-11 15:24:37,303 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:24:37,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:37,309 INFO L225 Difference]: With dead ends: 4720 [2020-11-11 15:24:37,309 INFO L226 Difference]: Without dead ends: 4450 [2020-11-11 15:24:37,309 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1259, Invalid=3997, Unknown=0, NotChecked=0, Total=5256 [2020-11-11 15:24:37,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2020-11-11 15:24:37,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3277. [2020-11-11 15:24:37,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3277 states, 3276 states have (on average 2.73992673992674) internal successors, (8976), 3276 states have internal predecessors, (8976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3277 states to 3277 states and 8976 transitions. [2020-11-11 15:24:37,360 INFO L78 Accepts]: Start accepts. Automaton has 3277 states and 8976 transitions. Word has length 146 [2020-11-11 15:24:37,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:37,360 INFO L481 AbstractCegarLoop]: Abstraction has 3277 states and 8976 transitions. [2020-11-11 15:24:37,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:37,360 INFO L276 IsEmpty]: Start isEmpty. Operand 3277 states and 8976 transitions. [2020-11-11 15:24:37,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:37,363 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:37,363 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:37,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:37,564 INFO L429 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:37,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:37,564 INFO L82 PathProgramCache]: Analyzing trace with hash -763193086, now seen corresponding path program 286 times [2020-11-11 15:24:37,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:37,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420215305] [2020-11-11 15:24:37,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:38,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420215305] [2020-11-11 15:24:38,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887818343] [2020-11-11 15:24:38,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:38,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:24:38,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:38,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-11 15:24:38,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:38,659 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:38,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:38,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:24:38,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098784611] [2020-11-11 15:24:38,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:24:38,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:38,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:24:38,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:24:38,710 INFO L87 Difference]: Start difference. First operand 3277 states and 8976 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:41,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:41,639 INFO L93 Difference]: Finished difference Result 4720 states and 12040 transitions. [2020-11-11 15:24:41,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 15:24:41,641 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:24:41,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:41,647 INFO L225 Difference]: With dead ends: 4720 [2020-11-11 15:24:41,647 INFO L226 Difference]: Without dead ends: 4450 [2020-11-11 15:24:41,647 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1230, Invalid=3740, Unknown=0, NotChecked=0, Total=4970 [2020-11-11 15:24:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2020-11-11 15:24:41,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3327. [2020-11-11 15:24:41,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.7438364401683706) internal successors, (9126), 3326 states have internal predecessors, (9126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:41,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 9126 transitions. [2020-11-11 15:24:41,700 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 9126 transitions. Word has length 146 [2020-11-11 15:24:41,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:41,700 INFO L481 AbstractCegarLoop]: Abstraction has 3327 states and 9126 transitions. [2020-11-11 15:24:41,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:41,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 9126 transitions. [2020-11-11 15:24:41,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:41,703 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:41,703 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:41,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:41,904 INFO L429 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:41,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:41,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1986481650, now seen corresponding path program 287 times [2020-11-11 15:24:41,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:41,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182305804] [2020-11-11 15:24:41,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:42,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182305804] [2020-11-11 15:24:42,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283552836] [2020-11-11 15:24:42,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:43,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-11 15:24:43,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:43,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:43,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:43,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:24:43,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:43,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:43,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-11-11 15:24:43,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740961526] [2020-11-11 15:24:43,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-11 15:24:43,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:43,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-11 15:24:43,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:24:43,201 INFO L87 Difference]: Start difference. First operand 3327 states and 9126 transitions. Second operand has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:46,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:46,848 INFO L93 Difference]: Finished difference Result 4720 states and 12090 transitions. [2020-11-11 15:24:46,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-11 15:24:46,850 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:24:46,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:46,856 INFO L225 Difference]: With dead ends: 4720 [2020-11-11 15:24:46,856 INFO L226 Difference]: Without dead ends: 4450 [2020-11-11 15:24:46,857 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1363, Invalid=4187, Unknown=0, NotChecked=0, Total=5550 [2020-11-11 15:24:46,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2020-11-11 15:24:46,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3377. [2020-11-11 15:24:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3377 states, 3376 states have (on average 2.7476303317535544) internal successors, (9276), 3376 states have internal predecessors, (9276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:46,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3377 states to 3377 states and 9276 transitions. [2020-11-11 15:24:46,909 INFO L78 Accepts]: Start accepts. Automaton has 3377 states and 9276 transitions. Word has length 146 [2020-11-11 15:24:46,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:46,909 INFO L481 AbstractCegarLoop]: Abstraction has 3377 states and 9276 transitions. [2020-11-11 15:24:46,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:46,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3377 states and 9276 transitions. [2020-11-11 15:24:46,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:46,913 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:46,913 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:47,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:47,113 INFO L429 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:47,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:47,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1419315776, now seen corresponding path program 288 times [2020-11-11 15:24:47,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:47,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053913054] [2020-11-11 15:24:47,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:48,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053913054] [2020-11-11 15:24:48,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037285103] [2020-11-11 15:24:48,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:48,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-11 15:24:48,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:48,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:48,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:48,229 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:48,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:48,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:24:48,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209071510] [2020-11-11 15:24:48,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:24:48,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:48,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:24:48,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:24:48,253 INFO L87 Difference]: Start difference. First operand 3377 states and 9276 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:51,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:51,383 INFO L93 Difference]: Finished difference Result 4720 states and 12140 transitions. [2020-11-11 15:24:51,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-11 15:24:51,385 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:24:51,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:51,390 INFO L225 Difference]: With dead ends: 4720 [2020-11-11 15:24:51,390 INFO L226 Difference]: Without dead ends: 4450 [2020-11-11 15:24:51,391 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1342, Invalid=3914, Unknown=0, NotChecked=0, Total=5256 [2020-11-11 15:24:51,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2020-11-11 15:24:51,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3427. [2020-11-11 15:24:51,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 2.7513134851138354) internal successors, (9426), 3426 states have internal predecessors, (9426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:51,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 9426 transitions. [2020-11-11 15:24:51,453 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 9426 transitions. Word has length 146 [2020-11-11 15:24:51,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:51,453 INFO L481 AbstractCegarLoop]: Abstraction has 3427 states and 9426 transitions. [2020-11-11 15:24:51,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:51,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 9426 transitions. [2020-11-11 15:24:51,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:51,456 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:51,457 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:51,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-11-11 15:24:51,657 INFO L429 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:51,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:51,658 INFO L82 PathProgramCache]: Analyzing trace with hash -2046940368, now seen corresponding path program 289 times [2020-11-11 15:24:51,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:51,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422345168] [2020-11-11 15:24:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:52,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422345168] [2020-11-11 15:24:52,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384054807] [2020-11-11 15:24:52,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:52,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:52,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:52,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:24:52,849 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:52,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:52,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-11-11 15:24:52,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378527975] [2020-11-11 15:24:52,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-11 15:24:52,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:52,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-11 15:24:52,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:24:52,872 INFO L87 Difference]: Start difference. First operand 3427 states and 9426 transitions. Second operand has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:56,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:24:56,903 INFO L93 Difference]: Finished difference Result 4720 states and 12190 transitions. [2020-11-11 15:24:56,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-11-11 15:24:56,905 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:24:56,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:24:56,910 INFO L225 Difference]: With dead ends: 4720 [2020-11-11 15:24:56,911 INFO L226 Difference]: Without dead ends: 4450 [2020-11-11 15:24:56,911 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1483, Invalid=4369, Unknown=0, NotChecked=0, Total=5852 [2020-11-11 15:24:56,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2020-11-11 15:24:56,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3477. [2020-11-11 15:24:56,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3477 states, 3476 states have (on average 2.7548906789413117) internal successors, (9576), 3476 states have internal predecessors, (9576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:56,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3477 states to 3477 states and 9576 transitions. [2020-11-11 15:24:56,965 INFO L78 Accepts]: Start accepts. Automaton has 3477 states and 9576 transitions. Word has length 146 [2020-11-11 15:24:56,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:24:56,965 INFO L481 AbstractCegarLoop]: Abstraction has 3477 states and 9576 transitions. [2020-11-11 15:24:56,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:24:56,966 INFO L276 IsEmpty]: Start isEmpty. Operand 3477 states and 9576 transitions. [2020-11-11 15:24:56,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:24:56,969 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:24:56,969 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:24:57,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable300,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:57,170 INFO L429 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:24:57,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:24:57,170 INFO L82 PathProgramCache]: Analyzing trace with hash 525488382, now seen corresponding path program 290 times [2020-11-11 15:24:57,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:24:57,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44791380] [2020-11-11 15:24:57,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:24:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:24:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:58,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44791380] [2020-11-11 15:24:58,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188758706] [2020-11-11 15:24:58,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:24:58,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:24:58,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:24:58,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:24:58,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:24:58,275 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:24:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:24:58,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:24:58,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:24:58,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339041372] [2020-11-11 15:24:58,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:24:58,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:24:58,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:24:58,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:24:58,299 INFO L87 Difference]: Start difference. First operand 3477 states and 9576 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:01,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:25:01,593 INFO L93 Difference]: Finished difference Result 4720 states and 12240 transitions. [2020-11-11 15:25:01,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-11 15:25:01,595 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:25:01,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:25:01,601 INFO L225 Difference]: With dead ends: 4720 [2020-11-11 15:25:01,601 INFO L226 Difference]: Without dead ends: 4450 [2020-11-11 15:25:01,602 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1470, Invalid=4080, Unknown=0, NotChecked=0, Total=5550 [2020-11-11 15:25:01,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2020-11-11 15:25:01,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3527. [2020-11-11 15:25:01,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3527 states, 3526 states have (on average 2.7583664208735112) internal successors, (9726), 3526 states have internal predecessors, (9726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:01,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3527 states to 3527 states and 9726 transitions. [2020-11-11 15:25:01,657 INFO L78 Accepts]: Start accepts. Automaton has 3527 states and 9726 transitions. Word has length 146 [2020-11-11 15:25:01,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:25:01,657 INFO L481 AbstractCegarLoop]: Abstraction has 3527 states and 9726 transitions. [2020-11-11 15:25:01,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:01,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3527 states and 9726 transitions. [2020-11-11 15:25:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:25:01,660 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:25:01,660 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:25:01,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-11-11 15:25:01,861 INFO L429 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:25:01,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:25:01,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1014047250, now seen corresponding path program 291 times [2020-11-11 15:25:01,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:25:01,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191189792] [2020-11-11 15:25:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:25:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:25:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:02,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191189792] [2020-11-11 15:25:02,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749820870] [2020-11-11 15:25:02,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:02,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-11-11 15:25:02,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:25:02,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:25:02,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:25:02,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:25:03,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:25:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:03,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:25:03,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-11-11 15:25:03,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137722113] [2020-11-11 15:25:03,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-11 15:25:03,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:25:03,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-11 15:25:03,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:25:03,132 INFO L87 Difference]: Start difference. First operand 3527 states and 9726 transitions. Second operand has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:07,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:25:07,314 INFO L93 Difference]: Finished difference Result 4720 states and 12290 transitions. [2020-11-11 15:25:07,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-11 15:25:07,316 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:25:07,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:25:07,322 INFO L225 Difference]: With dead ends: 4720 [2020-11-11 15:25:07,322 INFO L226 Difference]: Without dead ends: 4450 [2020-11-11 15:25:07,323 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1619, Invalid=4543, Unknown=0, NotChecked=0, Total=6162 [2020-11-11 15:25:07,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2020-11-11 15:25:07,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3577. [2020-11-11 15:25:07,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3577 states, 3576 states have (on average 2.761744966442953) internal successors, (9876), 3576 states have internal predecessors, (9876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3577 states to 3577 states and 9876 transitions. [2020-11-11 15:25:07,379 INFO L78 Accepts]: Start accepts. Automaton has 3577 states and 9876 transitions. Word has length 146 [2020-11-11 15:25:07,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:25:07,380 INFO L481 AbstractCegarLoop]: Abstraction has 3577 states and 9876 transitions. [2020-11-11 15:25:07,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:07,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3577 states and 9876 transitions. [2020-11-11 15:25:07,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:25:07,383 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:25:07,383 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:25:07,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2020-11-11 15:25:07,584 INFO L429 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:25:07,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:25:07,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1924353340, now seen corresponding path program 292 times [2020-11-11 15:25:07,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:25:07,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278873961] [2020-11-11 15:25:07,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:25:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:25:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:08,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278873961] [2020-11-11 15:25:08,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875129000] [2020-11-11 15:25:08,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:08,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:25:08,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:25:08,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-11 15:25:08,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:25:08,705 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:25:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:08,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:25:08,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:25:08,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902635137] [2020-11-11 15:25:08,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:25:08,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:25:08,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:25:08,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:25:08,726 INFO L87 Difference]: Start difference. First operand 3577 states and 9876 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:12,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:25:12,207 INFO L93 Difference]: Finished difference Result 4720 states and 12340 transitions. [2020-11-11 15:25:12,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-11 15:25:12,210 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:25:12,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:25:12,215 INFO L225 Difference]: With dead ends: 4720 [2020-11-11 15:25:12,215 INFO L226 Difference]: Without dead ends: 4450 [2020-11-11 15:25:12,216 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1614, Invalid=4238, Unknown=0, NotChecked=0, Total=5852 [2020-11-11 15:25:12,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2020-11-11 15:25:12,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3627. [2020-11-11 15:25:12,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 2.7650303364589077) internal successors, (10026), 3626 states have internal predecessors, (10026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:12,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 10026 transitions. [2020-11-11 15:25:12,269 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 10026 transitions. Word has length 146 [2020-11-11 15:25:12,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:25:12,269 INFO L481 AbstractCegarLoop]: Abstraction has 3627 states and 10026 transitions. [2020-11-11 15:25:12,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:12,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 10026 transitions. [2020-11-11 15:25:12,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:25:12,272 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:25:12,273 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:25:12,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-11-11 15:25:12,473 INFO L429 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:25:12,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:25:12,474 INFO L82 PathProgramCache]: Analyzing trace with hash -539081172, now seen corresponding path program 293 times [2020-11-11 15:25:12,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:25:12,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797420367] [2020-11-11 15:25:12,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:25:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:25:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:13,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797420367] [2020-11-11 15:25:13,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685636644] [2020-11-11 15:25:13,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:13,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-11 15:25:13,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:25:13,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:25:13,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:25:13,591 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:25:13,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:25:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:13,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:25:13,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-11-11 15:25:13,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457803331] [2020-11-11 15:25:13,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-11 15:25:13,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:25:13,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-11 15:25:13,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:25:13,713 INFO L87 Difference]: Start difference. First operand 3627 states and 10026 transitions. Second operand has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:18,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:25:18,145 INFO L93 Difference]: Finished difference Result 4765 states and 12510 transitions. [2020-11-11 15:25:18,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-11-11 15:25:18,147 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:25:18,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:25:18,154 INFO L225 Difference]: With dead ends: 4765 [2020-11-11 15:25:18,154 INFO L226 Difference]: Without dead ends: 4495 [2020-11-11 15:25:18,154 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1703 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1771, Invalid=4709, Unknown=0, NotChecked=0, Total=6480 [2020-11-11 15:25:18,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4495 states. [2020-11-11 15:25:18,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4495 to 3677. [2020-11-11 15:25:18,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3677 states, 3676 states have (on average 2.7723068552774754) internal successors, (10191), 3676 states have internal predecessors, (10191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:18,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 10191 transitions. [2020-11-11 15:25:18,206 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 10191 transitions. Word has length 146 [2020-11-11 15:25:18,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:25:18,206 INFO L481 AbstractCegarLoop]: Abstraction has 3677 states and 10191 transitions. [2020-11-11 15:25:18,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:18,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 10191 transitions. [2020-11-11 15:25:18,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:25:18,209 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:25:18,209 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:25:18,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:18,410 INFO L429 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:25:18,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:25:18,411 INFO L82 PathProgramCache]: Analyzing trace with hash 89710330, now seen corresponding path program 294 times [2020-11-11 15:25:18,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:25:18,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592089476] [2020-11-11 15:25:18,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:25:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:25:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:19,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592089476] [2020-11-11 15:25:19,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545202427] [2020-11-11 15:25:19,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:19,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-11 15:25:19,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:25:19,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:25:19,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:25:19,540 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:25:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:19,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:25:19,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-11 15:25:19,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009113136] [2020-11-11 15:25:19,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-11 15:25:19,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:25:19,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-11 15:25:19,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:25:19,590 INFO L87 Difference]: Start difference. First operand 3677 states and 10191 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:25:23,188 INFO L93 Difference]: Finished difference Result 5852 states and 15644 transitions. [2020-11-11 15:25:23,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-11 15:25:23,191 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:25:23,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:25:23,198 INFO L225 Difference]: With dead ends: 5852 [2020-11-11 15:25:23,198 INFO L226 Difference]: Without dead ends: 5582 [2020-11-11 15:25:23,199 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1775, Invalid=4387, Unknown=0, NotChecked=0, Total=6162 [2020-11-11 15:25:23,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5582 states. [2020-11-11 15:25:23,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5582 to 3802. [2020-11-11 15:25:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3802 states, 3801 states have (on average 2.784004209418574) internal successors, (10582), 3801 states have internal predecessors, (10582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:23,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3802 states to 3802 states and 10582 transitions. [2020-11-11 15:25:23,257 INFO L78 Accepts]: Start accepts. Automaton has 3802 states and 10582 transitions. Word has length 146 [2020-11-11 15:25:23,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:25:23,257 INFO L481 AbstractCegarLoop]: Abstraction has 3802 states and 10582 transitions. [2020-11-11 15:25:23,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:23,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3802 states and 10582 transitions. [2020-11-11 15:25:23,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-11 15:25:23,261 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:25:23,261 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:25:23,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2020-11-11 15:25:23,462 INFO L429 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:25:23,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:25:23,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1800918284, now seen corresponding path program 295 times [2020-11-11 15:25:23,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:25:23,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431853605] [2020-11-11 15:25:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:25:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:25:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:24,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431853605] [2020-11-11 15:25:24,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232036023] [2020-11-11 15:25:24,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:25:24,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-11 15:25:24,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:25:24,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:25:24,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:25:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:24,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:25:24,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-11-11 15:25:24,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198957075] [2020-11-11 15:25:24,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-11 15:25:24,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:25:24,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-11 15:25:24,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:25:24,685 INFO L87 Difference]: Start difference. First operand 3802 states and 10582 transitions. Second operand has 31 states, 31 states have (on average 4.806451612903226) internal successors, (149), 31 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:29,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:25:29,446 INFO L93 Difference]: Finished difference Result 5307 states and 14040 transitions. [2020-11-11 15:25:29,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-11-11 15:25:29,448 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.806451612903226) internal successors, (149), 31 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2020-11-11 15:25:29,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:25:29,454 INFO L225 Difference]: With dead ends: 5307 [2020-11-11 15:25:29,454 INFO L226 Difference]: Without dead ends: 4780 [2020-11-11 15:25:29,454 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1970 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1989, Invalid=5321, Unknown=0, NotChecked=0, Total=7310 [2020-11-11 15:25:29,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4780 states. [2020-11-11 15:25:29,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4780 to 3812. [2020-11-11 15:25:29,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3812 states, 3811 states have (on average 2.7777486224088164) internal successors, (10586), 3811 states have internal predecessors, (10586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:29,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3812 states to 3812 states and 10586 transitions. [2020-11-11 15:25:29,506 INFO L78 Accepts]: Start accepts. Automaton has 3812 states and 10586 transitions. Word has length 146 [2020-11-11 15:25:29,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:25:29,506 INFO L481 AbstractCegarLoop]: Abstraction has 3812 states and 10586 transitions. [2020-11-11 15:25:29,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.806451612903226) internal successors, (149), 31 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:25:29,506 INFO L276 IsEmpty]: Start isEmpty. Operand 3812 states and 10586 transitions. [2020-11-11 15:25:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-11-11 15:25:29,509 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:25:29,510 INFO L494 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 15:25:29,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:29,710 INFO L429 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:25:29,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:25:29,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1406609705, now seen corresponding path program 296 times [2020-11-11 15:25:29,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:25:29,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647018160] [2020-11-11 15:25:29,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:25:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:25:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:30,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647018160] [2020-11-11 15:25:30,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655314992] [2020-11-11 15:25:30,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:31,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:25:31,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:25:31,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-11 15:25:31,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:25:31,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:25:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:25:31,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:25:31,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-11-11 15:25:31,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66594633] [2020-11-11 15:25:31,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-11 15:25:31,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:25:31,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-11 15:25:31,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:25:31,195 INFO L87 Difference]: Start difference. First operand 3812 states and 10586 transitions. Second operand has 31 states, 31 states have (on average 4.935483870967742) internal successors, (153), 31 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2020-11-11 15:25:31,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 15:25:31,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:25:31,899 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-11 15:25:31,904 WARN L250 ceAbstractionStarter]: Timeout [2020-11-11 15:25:31,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.11 03:25:31 BasicIcfg [2020-11-11 15:25:31,905 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-11 15:25:31,906 INFO L168 Benchmark]: Toolchain (without parser) took 810612.14 ms. Allocated memory was 302.0 MB in the beginning and 675.3 MB in the end (delta: 373.3 MB). Free memory was 273.9 MB in the beginning and 280.7 MB in the end (delta: -6.7 MB). Peak memory consumption was 366.9 MB. Max. memory is 16.0 GB. [2020-11-11 15:25:31,907 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 302.0 MB. Free memory was 272.5 MB in the beginning and 272.3 MB in the end (delta: 141.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 15:25:31,907 INFO L168 Benchmark]: CACSL2BoogieTranslator took 981.82 ms. Allocated memory is still 302.0 MB. Free memory was 273.3 MB in the beginning and 264.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.0 GB. [2020-11-11 15:25:31,907 INFO L168 Benchmark]: Boogie Procedure Inliner took 94.00 ms. Allocated memory is still 302.0 MB. Free memory was 264.1 MB in the beginning and 262.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-11 15:25:31,908 INFO L168 Benchmark]: Boogie Preprocessor took 72.63 ms. Allocated memory is still 302.0 MB. Free memory was 262.1 MB in the beginning and 260.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 15:25:31,908 INFO L168 Benchmark]: RCFGBuilder took 565.84 ms. Allocated memory is still 302.0 MB. Free memory was 260.7 MB in the beginning and 276.7 MB in the end (delta: -16.0 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. [2020-11-11 15:25:31,909 INFO L168 Benchmark]: TraceAbstraction took 808878.42 ms. Allocated memory was 302.0 MB in the beginning and 675.3 MB in the end (delta: 373.3 MB). Free memory was 276.0 MB in the beginning and 280.7 MB in the end (delta: -4.6 MB). Peak memory consumption was 369.1 MB. Max. memory is 16.0 GB. [2020-11-11 15:25:31,911 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 302.0 MB. Free memory was 272.5 MB in the beginning and 272.3 MB in the end (delta: 141.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 981.82 ms. Allocated memory is still 302.0 MB. Free memory was 273.3 MB in the beginning and 264.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 94.00 ms. Allocated memory is still 302.0 MB. Free memory was 264.1 MB in the beginning and 262.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 72.63 ms. Allocated memory is still 302.0 MB. Free memory was 262.1 MB in the beginning and 260.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 565.84 ms. Allocated memory is still 302.0 MB. Free memory was 260.7 MB in the beginning and 276.7 MB in the end (delta: -16.0 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 808878.42 ms. Allocated memory was 302.0 MB in the beginning and 675.3 MB in the end (delta: 373.3 MB). Free memory was 276.0 MB in the beginning and 280.7 MB in the end (delta: -4.6 MB). Peak memory consumption was 369.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 685]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 685). Cancelled while BasicCegarLoop was constructing difference of abstraction (3812states) and FLOYD_HOARE automaton (currently 12 states, 31 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 38 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 808.7s, OverallIterations: 308, TraceHistogramMax: 13, AutomataDifference: 504.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 27630 SDtfs, 252161 SDslu, 269937 SDs, 0 SdLazy, 51020 SolverSat, 42653 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 72.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 47358 GetRequests, 32213 SyntacticMatches, 281 SemanticMatches, 14863 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195589 ImplicationChecksByTransitivity, 532.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3812occurred in iteration=307, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 15.1s AutomataMinimizationTime, 307 MinimizatonAttempts, 294961 StatesRemovedByMinimization, 307 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.2s SsaConstructionTime, 14.9s SatisfiabilityAnalysisTime, 188.3s InterpolantComputationTime, 65288 NumberOfCodeBlocks, 65288 NumberOfCodeBlocksAsserted, 1902 NumberOfCheckSat, 64679 ConstructedInterpolants, 0 QuantifiedInterpolants, 31859969 SizeOfPredicates, 5900 NumberOfNonLiveVariables, 66008 ConjunctsInSsa, 6849 ConjunctsInUnsatCore, 609 InterpolantComputations, 7 PerfectInterpolantSequences, 0/176962 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown