/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-keepdead.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-e5469eb [2021-01-20 17:49:05,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-20 17:49:05,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-20 17:49:05,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-20 17:49:05,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-20 17:49:05,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-20 17:49:05,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-20 17:49:05,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-20 17:49:05,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-20 17:49:05,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-20 17:49:05,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-20 17:49:05,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-20 17:49:05,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-20 17:49:05,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-20 17:49:05,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-20 17:49:05,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-20 17:49:05,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-20 17:49:05,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-20 17:49:05,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-20 17:49:05,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-20 17:49:05,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-20 17:49:05,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-20 17:49:05,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-20 17:49:05,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-20 17:49:05,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-20 17:49:05,373 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-20 17:49:05,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-20 17:49:05,377 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-20 17:49:05,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-20 17:49:05,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-20 17:49:05,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-20 17:49:05,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-20 17:49:05,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-20 17:49:05,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-20 17:49:05,386 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-20 17:49:05,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-20 17:49:05,388 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-20 17:49:05,388 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-20 17:49:05,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-20 17:49:05,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-20 17:49:05,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-20 17:49:05,391 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-keepdead.epf [2021-01-20 17:49:05,451 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-20 17:49:05,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-20 17:49:05,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-20 17:49:05,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-20 17:49:05,457 INFO L138 SettingsManager]: * Use SBE=true [2021-01-20 17:49:05,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-20 17:49:05,458 INFO L138 SettingsManager]: * sizeof long=4 [2021-01-20 17:49:05,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-20 17:49:05,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-01-20 17:49:05,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-20 17:49:05,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-20 17:49:05,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-20 17:49:05,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-20 17:49:05,460 INFO L138 SettingsManager]: * sizeof long double=12 [2021-01-20 17:49:05,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-20 17:49:05,461 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-20 17:49:05,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-20 17:49:05,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-20 17:49:05,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-20 17:49:05,462 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-01-20 17:49:05,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-20 17:49:05,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-20 17:49:05,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-20 17:49:05,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-20 17:49:05,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-20 17:49:05,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-20 17:49:05,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-20 17:49:05,464 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-01-20 17:49:05,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-20 17:49:05,464 INFO L138 SettingsManager]: * Remove dead ends from automaton=false [2021-01-20 17:49:05,464 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2021-01-20 17:49:05,465 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-20 17:49:05,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-20 17:49:05,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-20 17:49:05,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-20 17:49:05,882 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-20 17:49:05,883 INFO L275 PluginConnector]: CDTParser initialized [2021-01-20 17:49:05,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2021-01-20 17:49:05,971 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/924bd331f/1dbc13465746487f8d0102782c241a66/FLAG9fb0014a6 [2021-01-20 17:49:06,804 INFO L306 CDTParser]: Found 1 translation units. [2021-01-20 17:49:06,804 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2021-01-20 17:49:06,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/924bd331f/1dbc13465746487f8d0102782c241a66/FLAG9fb0014a6 [2021-01-20 17:49:07,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/924bd331f/1dbc13465746487f8d0102782c241a66 [2021-01-20 17:49:07,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-20 17:49:07,082 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-01-20 17:49:07,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-20 17:49:07,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-20 17:49:07,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-20 17:49:07,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a68553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07, skipping insertion in model container [2021-01-20 17:49:07,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-20 17:49:07,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-20 17:49:07,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 17:49:07,536 INFO L203 MainTranslator]: Completed pre-run [2021-01-20 17:49:07,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-20 17:49:07,732 INFO L208 MainTranslator]: Completed translation [2021-01-20 17:49:07,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07 WrapperNode [2021-01-20 17:49:07,733 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-20 17:49:07,734 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-20 17:49:07,734 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-20 17:49:07,736 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-20 17:49:07,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-20 17:49:07,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-20 17:49:07,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-20 17:49:07,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-20 17:49:07,861 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (1/1) ... [2021-01-20 17:49:07,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-20 17:49:07,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-20 17:49:07,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-20 17:49:07,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-20 17:49:07,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (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 [2021-01-20 17:49:07,960 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-20 17:49:07,960 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-20 17:49:07,960 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-20 17:49:07,961 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-20 17:49:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-20 17:49:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-20 17:49:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-20 17:49:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-20 17:49:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-20 17:49:07,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-20 17:49:07,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-20 17:49:07,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-20 17:49:07,964 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-01-20 17:49:08,530 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-20 17:49:08,531 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-20 17:49:08,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 05:49:08 BoogieIcfgContainer [2021-01-20 17:49:08,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-20 17:49:08,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-20 17:49:08,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-20 17:49:08,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-20 17:49:08,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 05:49:07" (1/3) ... [2021-01-20 17:49:08,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6205b01e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 05:49:08, skipping insertion in model container [2021-01-20 17:49:08,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 05:49:07" (2/3) ... [2021-01-20 17:49:08,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6205b01e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 05:49:08, skipping insertion in model container [2021-01-20 17:49:08,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 05:49:08" (3/3) ... [2021-01-20 17:49:08,546 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2021-01-20 17:49:08,564 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-20 17:49:08,564 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-20 17:49:08,569 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-20 17:49:08,570 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-20 17:49:08,612 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,612 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,613 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,613 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,614 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,614 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,614 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,614 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,615 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,616 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,616 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,617 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,617 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,617 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,619 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,619 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,619 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,619 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,620 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,620 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,620 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,620 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,621 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,621 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,621 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,621 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,622 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,622 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,623 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,623 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,624 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,624 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,624 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,624 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,624 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,625 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,626 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,626 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,626 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,628 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,628 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,628 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,629 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,629 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,629 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,629 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,630 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,630 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,630 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,631 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,631 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,632 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,632 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,632 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,632 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,632 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,633 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,633 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,635 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,636 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,638 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,639 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,639 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,639 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,639 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,640 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,647 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,647 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,648 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,648 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,649 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,649 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-20 17:49:08,661 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-20 17:49:08,676 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-20 17:49:08,715 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-20 17:49:08,715 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-20 17:49:08,715 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-20 17:49:08,715 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-20 17:49:08,716 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-20 17:49:08,717 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-20 17:49:08,717 INFO L383 AbstractCegarLoop]: Minimize is NONE [2021-01-20 17:49:08,717 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-20 17:49:08,732 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 66 transitions, 142 flow [2021-01-20 17:49:08,905 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:08,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:08,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-20 17:49:08,932 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:08,933 INFO L504 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] [2021-01-20 17:49:08,933 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:08,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:08,940 INFO L82 PathProgramCache]: Analyzing trace with hash 811106412, now seen corresponding path program 1 times [2021-01-20 17:49:08,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:08,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127225076] [2021-01-20 17:49:08,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:09,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127225076] [2021-01-20 17:49:09,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:09,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-20 17:49:09,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467518634] [2021-01-20 17:49:09,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-20 17:49:09,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:09,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-20 17:49:09,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-20 17:49:09,475 INFO L87 Difference]: Start difference. First operand has 2229 states, 2227 states have (on average 3.205208801077683) internal successors, (7138), 2228 states have internal predecessors, (7138), 0 states have call successors, (0), 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) [2021-01-20 17:49:09,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:09,866 INFO L93 Difference]: Finished difference Result 4034 states and 11738 transitions. [2021-01-20 17:49:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-20 17:49:09,870 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 [2021-01-20 17:49:09,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:09,874 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-20 17:49:09,874 INFO L78 Accepts]: Start accepts. Automaton has 4034 states and 11738 transitions. Word has length 28 [2021-01-20 17:49:09,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:09,876 INFO L481 AbstractCegarLoop]: Abstraction has 4034 states and 11738 transitions. [2021-01-20 17:49:09,876 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) [2021-01-20 17:49:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 4034 states and 11738 transitions. [2021-01-20 17:49:09,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 17:49:09,900 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:09,901 INFO L504 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] [2021-01-20 17:49:09,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-20 17:49:09,902 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:09,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:09,905 INFO L82 PathProgramCache]: Analyzing trace with hash -2008820546, now seen corresponding path program 1 times [2021-01-20 17:49:09,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:09,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700446340] [2021-01-20 17:49:09,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:10,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700446340] [2021-01-20 17:49:10,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:10,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 17:49:10,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591299639] [2021-01-20 17:49:10,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 17:49:10,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:10,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 17:49:10,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-20 17:49:10,141 INFO L87 Difference]: Start difference. First operand 4034 states and 11738 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:10,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:10,377 INFO L93 Difference]: Finished difference Result 6170 states and 17930 transitions. [2021-01-20 17:49:10,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-20 17:49:10,378 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-01-20 17:49:10,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:10,380 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-01-20 17:49:10,380 INFO L78 Accepts]: Start accepts. Automaton has 6170 states and 17930 transitions. Word has length 33 [2021-01-20 17:49:10,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:10,380 INFO L481 AbstractCegarLoop]: Abstraction has 6170 states and 17930 transitions. [2021-01-20 17:49:10,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:10,381 INFO L276 IsEmpty]: Start isEmpty. Operand 6170 states and 17930 transitions. [2021-01-20 17:49:10,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 17:49:10,384 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:10,385 INFO L504 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] [2021-01-20 17:49:10,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-20 17:49:10,385 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:10,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:10,386 INFO L82 PathProgramCache]: Analyzing trace with hash 103991554, now seen corresponding path program 1 times [2021-01-20 17:49:10,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:10,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290899374] [2021-01-20 17:49:10,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:10,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290899374] [2021-01-20 17:49:10,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:10,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 17:49:10,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989398696] [2021-01-20 17:49:10,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 17:49:10,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:10,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 17:49:10,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-20 17:49:10,593 INFO L87 Difference]: Start difference. First operand 6170 states and 17930 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:10,853 INFO L93 Difference]: Finished difference Result 7706 states and 22410 transitions. [2021-01-20 17:49:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-20 17:49:10,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-01-20 17:49:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:10,855 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-01-20 17:49:10,855 INFO L78 Accepts]: Start accepts. Automaton has 7706 states and 22410 transitions. Word has length 33 [2021-01-20 17:49:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:10,857 INFO L481 AbstractCegarLoop]: Abstraction has 7706 states and 22410 transitions. [2021-01-20 17:49:10,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:10,857 INFO L276 IsEmpty]: Start isEmpty. Operand 7706 states and 22410 transitions. [2021-01-20 17:49:10,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-20 17:49:10,861 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:10,861 INFO L504 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] [2021-01-20 17:49:10,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-20 17:49:10,861 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:10,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:10,862 INFO L82 PathProgramCache]: Analyzing trace with hash -899974956, now seen corresponding path program 2 times [2021-01-20 17:49:10,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:10,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208261531] [2021-01-20 17:49:10,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:11,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208261531] [2021-01-20 17:49:11,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:11,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-20 17:49:11,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437325279] [2021-01-20 17:49:11,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-20 17:49:11,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:11,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-20 17:49:11,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-20 17:49:11,038 INFO L87 Difference]: Start difference. First operand 7706 states and 22410 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:11,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:11,314 INFO L93 Difference]: Finished difference Result 9242 states and 26890 transitions. [2021-01-20 17:49:11,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-20 17:49:11,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-01-20 17:49:11,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:11,316 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-01-20 17:49:11,316 INFO L78 Accepts]: Start accepts. Automaton has 9242 states and 26890 transitions. Word has length 33 [2021-01-20 17:49:11,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:11,316 INFO L481 AbstractCegarLoop]: Abstraction has 9242 states and 26890 transitions. [2021-01-20 17:49:11,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:11,317 INFO L276 IsEmpty]: Start isEmpty. Operand 9242 states and 26890 transitions. [2021-01-20 17:49:11,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 17:49:11,325 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:11,325 INFO L504 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] [2021-01-20 17:49:11,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-20 17:49:11,326 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:11,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:11,326 INFO L82 PathProgramCache]: Analyzing trace with hash -421493469, now seen corresponding path program 1 times [2021-01-20 17:49:11,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:11,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987567351] [2021-01-20 17:49:11,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:11,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987567351] [2021-01-20 17:49:11,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045989983] [2021-01-20 17:49:11,523 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 [2021-01-20 17:49:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:11,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-20 17:49:11,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:11,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:11,785 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:11,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:11,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-01-20 17:49:11,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985108342] [2021-01-20 17:49:11,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-20 17:49:11,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:11,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-20 17:49:11,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-01-20 17:49:11,798 INFO L87 Difference]: Start difference. First operand 9242 states and 26890 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:12,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:12,351 INFO L93 Difference]: Finished difference Result 14090 states and 40938 transitions. [2021-01-20 17:49:12,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 17:49:12,352 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-20 17:49:12,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:12,356 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2021-01-20 17:49:12,356 INFO L78 Accepts]: Start accepts. Automaton has 14090 states and 40938 transitions. Word has length 38 [2021-01-20 17:49:12,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:12,357 INFO L481 AbstractCegarLoop]: Abstraction has 14090 states and 40938 transitions. [2021-01-20 17:49:12,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:12,357 INFO L276 IsEmpty]: Start isEmpty. Operand 14090 states and 40938 transitions. [2021-01-20 17:49:12,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 17:49:12,367 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:12,368 INFO L504 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, 1, 1] [2021-01-20 17:49:12,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:12,584 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:12,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:12,585 INFO L82 PathProgramCache]: Analyzing trace with hash -869705744, now seen corresponding path program 1 times [2021-01-20 17:49:12,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:12,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305244405] [2021-01-20 17:49:12,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:12,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305244405] [2021-01-20 17:49:12,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:12,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 17:49:12,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780920088] [2021-01-20 17:49:12,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 17:49:12,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:12,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 17:49:12,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-20 17:49:12,786 INFO L87 Difference]: Start difference. First operand 14090 states and 40938 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:13,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:13,157 INFO L93 Difference]: Finished difference Result 14922 states and 43370 transitions. [2021-01-20 17:49:13,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-20 17:49:13,157 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-20 17:49:13,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:13,158 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-01-20 17:49:13,158 INFO L78 Accepts]: Start accepts. Automaton has 14922 states and 43370 transitions. Word has length 38 [2021-01-20 17:49:13,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:13,159 INFO L481 AbstractCegarLoop]: Abstraction has 14922 states and 43370 transitions. [2021-01-20 17:49:13,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:13,159 INFO L276 IsEmpty]: Start isEmpty. Operand 14922 states and 43370 transitions. [2021-01-20 17:49:13,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 17:49:13,168 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:13,168 INFO L504 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, 1, 1] [2021-01-20 17:49:13,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-20 17:49:13,169 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:13,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:13,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1873672254, now seen corresponding path program 2 times [2021-01-20 17:49:13,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:13,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495440101] [2021-01-20 17:49:13,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:13,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495440101] [2021-01-20 17:49:13,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:13,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 17:49:13,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417543178] [2021-01-20 17:49:13,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 17:49:13,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:13,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 17:49:13,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-20 17:49:13,349 INFO L87 Difference]: Start difference. First operand 14922 states and 43370 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:13,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:13,936 INFO L93 Difference]: Finished difference Result 18506 states and 53802 transitions. [2021-01-20 17:49:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 17:49:13,937 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-20 17:49:13,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:13,940 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:49:13,940 INFO L78 Accepts]: Start accepts. Automaton has 18506 states and 53802 transitions. Word has length 38 [2021-01-20 17:49:13,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:13,941 INFO L481 AbstractCegarLoop]: Abstraction has 18506 states and 53802 transitions. [2021-01-20 17:49:13,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:13,941 INFO L276 IsEmpty]: Start isEmpty. Operand 18506 states and 53802 transitions. [2021-01-20 17:49:13,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-20 17:49:13,953 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:13,953 INFO L504 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, 1, 1] [2021-01-20 17:49:13,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-20 17:49:13,954 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:13,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:13,954 INFO L82 PathProgramCache]: Analyzing trace with hash 587213024, now seen corresponding path program 3 times [2021-01-20 17:49:13,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:13,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078356603] [2021-01-20 17:49:13,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:14,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078356603] [2021-01-20 17:49:14,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-20 17:49:14,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-20 17:49:14,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018921214] [2021-01-20 17:49:14,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-20 17:49:14,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:14,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-20 17:49:14,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-20 17:49:14,118 INFO L87 Difference]: Start difference. First operand 18506 states and 53802 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:14,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:14,662 INFO L93 Difference]: Finished difference Result 22538 states and 65578 transitions. [2021-01-20 17:49:14,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-20 17:49:14,663 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-01-20 17:49:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:14,664 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:49:14,664 INFO L78 Accepts]: Start accepts. Automaton has 22538 states and 65578 transitions. Word has length 38 [2021-01-20 17:49:14,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:14,664 INFO L481 AbstractCegarLoop]: Abstraction has 22538 states and 65578 transitions. [2021-01-20 17:49:14,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:14,665 INFO L276 IsEmpty]: Start isEmpty. Operand 22538 states and 65578 transitions. [2021-01-20 17:49:14,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:14,685 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:14,686 INFO L504 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, 1, 1] [2021-01-20 17:49:14,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-20 17:49:14,686 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:14,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:14,687 INFO L82 PathProgramCache]: Analyzing trace with hash 810819243, now seen corresponding path program 1 times [2021-01-20 17:49:14,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:14,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322862259] [2021-01-20 17:49:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:14,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322862259] [2021-01-20 17:49:14,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866869695] [2021-01-20 17:49:14,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-01-20 17:49:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:14,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 17:49:14,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:15,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:15,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:15,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:15,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 17:49:15,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587953487] [2021-01-20 17:49:15,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 17:49:15,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:15,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 17:49:15,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-01-20 17:49:15,080 INFO L87 Difference]: Start difference. First operand 22538 states and 65578 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:15,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:15,692 INFO L93 Difference]: Finished difference Result 23434 states and 68202 transitions. [2021-01-20 17:49:15,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-20 17:49:15,693 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 17:49:15,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:15,694 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-01-20 17:49:15,694 INFO L78 Accepts]: Start accepts. Automaton has 23434 states and 68202 transitions. Word has length 43 [2021-01-20 17:49:15,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:15,694 INFO L481 AbstractCegarLoop]: Abstraction has 23434 states and 68202 transitions. [2021-01-20 17:49:15,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:15,695 INFO L276 IsEmpty]: Start isEmpty. Operand 23434 states and 68202 transitions. [2021-01-20 17:49:15,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:15,715 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:15,715 INFO L504 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, 1, 1] [2021-01-20 17:49:15,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:15,931 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:15,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:15,932 INFO L82 PathProgramCache]: Analyzing trace with hash -193147267, now seen corresponding path program 2 times [2021-01-20 17:49:15,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:15,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870829784] [2021-01-20 17:49:15,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:16,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:16,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870829784] [2021-01-20 17:49:16,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245518883] [2021-01-20 17:49:16,078 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 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 [2021-01-20 17:49:16,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:16,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:16,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 17:49:16,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:16,299 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:49:16,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:16,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:16,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 17:49:16,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630814197] [2021-01-20 17:49:16,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 17:49:16,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:16,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 17:49:16,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-01-20 17:49:16,375 INFO L87 Difference]: Start difference. First operand 23434 states and 68202 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:17,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:17,326 INFO L93 Difference]: Finished difference Result 30922 states and 90026 transitions. [2021-01-20 17:49:17,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-20 17:49:17,326 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 17:49:17,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:17,327 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=842, Unknown=0, NotChecked=0, Total=1122 [2021-01-20 17:49:17,327 INFO L78 Accepts]: Start accepts. Automaton has 30922 states and 90026 transitions. Word has length 43 [2021-01-20 17:49:17,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:17,328 INFO L481 AbstractCegarLoop]: Abstraction has 30922 states and 90026 transitions. [2021-01-20 17:49:17,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:17,328 INFO L276 IsEmpty]: Start isEmpty. Operand 30922 states and 90026 transitions. [2021-01-20 17:49:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:17,345 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:17,346 INFO L504 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, 1, 1] [2021-01-20 17:49:17,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-20 17:49:17,559 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:17,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:17,560 INFO L82 PathProgramCache]: Analyzing trace with hash -2089322251, now seen corresponding path program 1 times [2021-01-20 17:49:17,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:17,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533098179] [2021-01-20 17:49:17,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:17,790 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 10 [2021-01-20 17:49:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:17,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533098179] [2021-01-20 17:49:17,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472574995] [2021-01-20 17:49:17,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-01-20 17:49:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:17,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 17:49:17,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:18,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:18,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:18,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 17:49:18,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201473247] [2021-01-20 17:49:18,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 17:49:18,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:18,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 17:49:18,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-01-20 17:49:18,030 INFO L87 Difference]: Start difference. First operand 30922 states and 90026 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:18,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:18,720 INFO L93 Difference]: Finished difference Result 36874 states and 107370 transitions. [2021-01-20 17:49:18,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 17:49:18,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 17:49:18,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:18,723 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=224, Invalid=646, Unknown=0, NotChecked=0, Total=870 [2021-01-20 17:49:18,723 INFO L78 Accepts]: Start accepts. Automaton has 36874 states and 107370 transitions. Word has length 43 [2021-01-20 17:49:18,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:18,724 INFO L481 AbstractCegarLoop]: Abstraction has 36874 states and 107370 transitions. [2021-01-20 17:49:18,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:18,724 INFO L276 IsEmpty]: Start isEmpty. Operand 36874 states and 107370 transitions. [2021-01-20 17:49:18,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:18,739 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:18,739 INFO L504 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, 1, 1] [2021-01-20 17:49:18,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:18,941 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:18,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:18,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1853174015, now seen corresponding path program 2 times [2021-01-20 17:49:18,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:18,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621676404] [2021-01-20 17:49:18,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:19,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621676404] [2021-01-20 17:49:19,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009646506] [2021-01-20 17:49:19,071 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 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 [2021-01-20 17:49:19,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:19,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:19,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 17:49:19,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:19,263 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:19,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:19,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 17:49:19,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175021144] [2021-01-20 17:49:19,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 17:49:19,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:19,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 17:49:19,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-01-20 17:49:19,273 INFO L87 Difference]: Start difference. First operand 36874 states and 107370 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:20,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:20,170 INFO L93 Difference]: Finished difference Result 40010 states and 116522 transitions. [2021-01-20 17:49:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-20 17:49:20,171 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 17:49:20,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:20,172 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=791, Unknown=0, NotChecked=0, Total=1056 [2021-01-20 17:49:20,172 INFO L78 Accepts]: Start accepts. Automaton has 40010 states and 116522 transitions. Word has length 43 [2021-01-20 17:49:20,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:20,172 INFO L481 AbstractCegarLoop]: Abstraction has 40010 states and 116522 transitions. [2021-01-20 17:49:20,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:20,172 INFO L276 IsEmpty]: Start isEmpty. Operand 40010 states and 116522 transitions. [2021-01-20 17:49:20,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-20 17:49:20,188 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:20,188 INFO L504 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, 1, 1] [2021-01-20 17:49:20,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-20 17:49:20,392 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:20,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:20,393 INFO L82 PathProgramCache]: Analyzing trace with hash 2013675815, now seen corresponding path program 3 times [2021-01-20 17:49:20,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:20,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8536712] [2021-01-20 17:49:20,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:20,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8536712] [2021-01-20 17:49:20,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208285514] [2021-01-20 17:49:20,695 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 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 [2021-01-20 17:49:20,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 17:49:20,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:20,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-20 17:49:20,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:20,869 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:49:20,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:20,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:20,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-20 17:49:20,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5438522] [2021-01-20 17:49:20,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-20 17:49:20,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:20,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-20 17:49:20,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-01-20 17:49:20,891 INFO L87 Difference]: Start difference. First operand 40010 states and 116522 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:22,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:22,092 INFO L93 Difference]: Finished difference Result 50698 states and 147818 transitions. [2021-01-20 17:49:22,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 17:49:22,093 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-01-20 17:49:22,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:22,094 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=460, Invalid=1346, Unknown=0, NotChecked=0, Total=1806 [2021-01-20 17:49:22,094 INFO L78 Accepts]: Start accepts. Automaton has 50698 states and 147818 transitions. Word has length 43 [2021-01-20 17:49:22,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:22,094 INFO L481 AbstractCegarLoop]: Abstraction has 50698 states and 147818 transitions. [2021-01-20 17:49:22,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:22,095 INFO L276 IsEmpty]: Start isEmpty. Operand 50698 states and 147818 transitions. [2021-01-20 17:49:22,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:22,127 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:22,127 INFO L504 BasicCegarLoop]: trace histogram [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] [2021-01-20 17:49:22,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:22,328 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:22,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:22,329 INFO L82 PathProgramCache]: Analyzing trace with hash 264667651, now seen corresponding path program 2 times [2021-01-20 17:49:22,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:22,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555269463] [2021-01-20 17:49:22,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:22,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555269463] [2021-01-20 17:49:22,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988610309] [2021-01-20 17:49:22,513 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 [2021-01-20 17:49:22,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:22,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:22,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:22,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:22,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:22,817 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:22,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:22,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 17:49:22,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606591713] [2021-01-20 17:49:22,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 17:49:22,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:22,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 17:49:22,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-01-20 17:49:22,828 INFO L87 Difference]: Start difference. First operand 50698 states and 147818 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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) [2021-01-20 17:49:23,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:23,640 INFO L93 Difference]: Finished difference Result 58106 states and 169290 transitions. [2021-01-20 17:49:23,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-20 17:49:23,640 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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 48 [2021-01-20 17:49:23,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:23,641 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2021-01-20 17:49:23,641 INFO L78 Accepts]: Start accepts. Automaton has 58106 states and 169290 transitions. Word has length 48 [2021-01-20 17:49:23,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:23,641 INFO L481 AbstractCegarLoop]: Abstraction has 58106 states and 169290 transitions. [2021-01-20 17:49:23,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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) [2021-01-20 17:49:23,642 INFO L276 IsEmpty]: Start isEmpty. Operand 58106 states and 169290 transitions. [2021-01-20 17:49:23,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:23,662 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:23,662 INFO L504 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-01-20 17:49:23,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-20 17:49:23,863 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:23,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:23,864 INFO L82 PathProgramCache]: Analyzing trace with hash -183544624, now seen corresponding path program 3 times [2021-01-20 17:49:23,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:23,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213063681] [2021-01-20 17:49:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:24,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213063681] [2021-01-20 17:49:24,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543946646] [2021-01-20 17:49:24,037 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 [2021-01-20 17:49:24,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 17:49:24,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:24,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:24,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:24,330 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-01-20 17:49:24,349 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:24,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:24,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:49:24,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126858182] [2021-01-20 17:49:24,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:24,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:24,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:24,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:24,371 INFO L87 Difference]: Start difference. First operand 58106 states and 169290 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2021-01-20 17:49:25,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:25,040 INFO L93 Difference]: Finished difference Result 59066 states and 172106 transitions. [2021-01-20 17:49:25,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-20 17:49:25,047 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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 48 [2021-01-20 17:49:25,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:25,048 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-01-20 17:49:25,048 INFO L78 Accepts]: Start accepts. Automaton has 59066 states and 172106 transitions. Word has length 48 [2021-01-20 17:49:25,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:25,048 INFO L481 AbstractCegarLoop]: Abstraction has 59066 states and 172106 transitions. [2021-01-20 17:49:25,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2021-01-20 17:49:25,049 INFO L276 IsEmpty]: Start isEmpty. Operand 59066 states and 172106 transitions. [2021-01-20 17:49:25,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:25,079 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:25,079 INFO L504 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-01-20 17:49:25,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-20 17:49:25,281 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:25,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:25,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1187511134, now seen corresponding path program 4 times [2021-01-20 17:49:25,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:25,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314987092] [2021-01-20 17:49:25,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:25,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314987092] [2021-01-20 17:49:25,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138499840] [2021-01-20 17:49:25,482 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 [2021-01-20 17:49:25,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:49:25,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:25,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:25,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:25,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:49:25,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:25,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:25,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:49:25,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912623873] [2021-01-20 17:49:25,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:25,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:25,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:25,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:25,863 INFO L87 Difference]: Start difference. First operand 59066 states and 172106 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2021-01-20 17:49:27,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:27,127 INFO L93 Difference]: Finished difference Result 64442 states and 187786 transitions. [2021-01-20 17:49:27,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 17:49:27,127 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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 48 [2021-01-20 17:49:27,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:27,128 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 17:49:27,128 INFO L78 Accepts]: Start accepts. Automaton has 64442 states and 187786 transitions. Word has length 48 [2021-01-20 17:49:27,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:27,129 INFO L481 AbstractCegarLoop]: Abstraction has 64442 states and 187786 transitions. [2021-01-20 17:49:27,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2021-01-20 17:49:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 64442 states and 187786 transitions. [2021-01-20 17:49:27,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:27,155 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:27,156 INFO L504 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, 1, 1] [2021-01-20 17:49:27,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-20 17:49:27,370 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:27,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:27,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1211281178, now seen corresponding path program 1 times [2021-01-20 17:49:27,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:27,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65382343] [2021-01-20 17:49:27,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:27,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65382343] [2021-01-20 17:49:27,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546690672] [2021-01-20 17:49:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-01-20 17:49:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:27,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:27,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:27,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:27,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:27,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:49:27,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684837035] [2021-01-20 17:49:27,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:27,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:27,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:27,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:27,760 INFO L87 Difference]: Start difference. First operand 64442 states and 187786 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2021-01-20 17:49:28,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:28,825 INFO L93 Difference]: Finished difference Result 67450 states and 196554 transitions. [2021-01-20 17:49:28,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-20 17:49:28,826 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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 48 [2021-01-20 17:49:28,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:28,827 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2021-01-20 17:49:28,827 INFO L78 Accepts]: Start accepts. Automaton has 67450 states and 196554 transitions. Word has length 48 [2021-01-20 17:49:28,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:28,827 INFO L481 AbstractCegarLoop]: Abstraction has 67450 states and 196554 transitions. [2021-01-20 17:49:28,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2021-01-20 17:49:28,827 INFO L276 IsEmpty]: Start isEmpty. Operand 67450 states and 196554 transitions. [2021-01-20 17:49:29,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:29,016 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:29,016 INFO L504 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, 1, 1] [2021-01-20 17:49:29,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-20 17:49:29,230 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:29,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:29,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1447429414, now seen corresponding path program 2 times [2021-01-20 17:49:29,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:29,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901564072] [2021-01-20 17:49:29,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:29,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901564072] [2021-01-20 17:49:29,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002916410] [2021-01-20 17:49:29,366 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 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 [2021-01-20 17:49:29,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:29,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:29,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:29,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:29,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:29,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:29,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:49:29,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970670449] [2021-01-20 17:49:29,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:29,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:29,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:29,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:29,621 INFO L87 Difference]: Start difference. First operand 67450 states and 196554 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2021-01-20 17:49:30,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:30,897 INFO L93 Difference]: Finished difference Result 68922 states and 200842 transitions. [2021-01-20 17:49:30,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-20 17:49:30,898 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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 48 [2021-01-20 17:49:30,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:30,899 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 17:49:30,900 INFO L78 Accepts]: Start accepts. Automaton has 68922 states and 200842 transitions. Word has length 48 [2021-01-20 17:49:30,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:30,900 INFO L481 AbstractCegarLoop]: Abstraction has 68922 states and 200842 transitions. [2021-01-20 17:49:30,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2021-01-20 17:49:30,900 INFO L276 IsEmpty]: Start isEmpty. Operand 68922 states and 200842 transitions. [2021-01-20 17:49:30,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:30,943 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:30,943 INFO L504 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, 1, 1] [2021-01-20 17:49:31,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-20 17:49:31,157 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:31,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:31,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1019311948, now seen corresponding path program 3 times [2021-01-20 17:49:31,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:31,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360308325] [2021-01-20 17:49:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:31,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360308325] [2021-01-20 17:49:31,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158497868] [2021-01-20 17:49:31,347 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 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 [2021-01-20 17:49:31,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 17:49:31,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:31,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:31,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:31,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:49:31,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:31,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:31,621 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:31,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:31,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 17:49:31,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181875231] [2021-01-20 17:49:31,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 17:49:31,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:31,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 17:49:31,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-01-20 17:49:31,679 INFO L87 Difference]: Start difference. First operand 68922 states and 200842 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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) [2021-01-20 17:49:33,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:33,909 INFO L93 Difference]: Finished difference Result 92602 states and 270090 transitions. [2021-01-20 17:49:33,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-20 17:49:33,909 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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 48 [2021-01-20 17:49:33,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:33,911 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=757, Invalid=2549, Unknown=0, NotChecked=0, Total=3306 [2021-01-20 17:49:33,911 INFO L78 Accepts]: Start accepts. Automaton has 92602 states and 270090 transitions. Word has length 48 [2021-01-20 17:49:33,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:33,911 INFO L481 AbstractCegarLoop]: Abstraction has 92602 states and 270090 transitions. [2021-01-20 17:49:33,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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) [2021-01-20 17:49:33,911 INFO L276 IsEmpty]: Start isEmpty. Operand 92602 states and 270090 transitions. [2021-01-20 17:49:34,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:34,187 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:34,188 INFO L504 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, 1, 1] [2021-01-20 17:49:34,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:34,401 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:34,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:34,402 INFO L82 PathProgramCache]: Analyzing trace with hash 310617624, now seen corresponding path program 4 times [2021-01-20 17:49:34,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:34,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072683652] [2021-01-20 17:49:34,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:34,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072683652] [2021-01-20 17:49:34,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392176814] [2021-01-20 17:49:34,569 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 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 [2021-01-20 17:49:34,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:49:34,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:34,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:34,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:34,781 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:34,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:34,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:49:34,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941012473] [2021-01-20 17:49:34,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:34,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:34,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:34,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:34,792 INFO L87 Difference]: Start difference. First operand 92602 states and 270090 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2021-01-20 17:49:36,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:36,074 INFO L93 Difference]: Finished difference Result 100730 states and 293770 transitions. [2021-01-20 17:49:36,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 17:49:36,075 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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 48 [2021-01-20 17:49:36,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:36,075 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=355, Invalid=1051, Unknown=0, NotChecked=0, Total=1406 [2021-01-20 17:49:36,075 INFO L78 Accepts]: Start accepts. Automaton has 100730 states and 293770 transitions. Word has length 48 [2021-01-20 17:49:36,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:36,076 INFO L481 AbstractCegarLoop]: Abstraction has 100730 states and 293770 transitions. [2021-01-20 17:49:36,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2021-01-20 17:49:36,076 INFO L276 IsEmpty]: Start isEmpty. Operand 100730 states and 293770 transitions. [2021-01-20 17:49:36,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:36,099 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:36,100 INFO L504 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, 1, 1] [2021-01-20 17:49:36,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-01-20 17:49:36,300 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:36,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:36,301 INFO L82 PathProgramCache]: Analyzing trace with hash -958721652, now seen corresponding path program 5 times [2021-01-20 17:49:36,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:36,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958272886] [2021-01-20 17:49:36,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:36,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958272886] [2021-01-20 17:49:36,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621568060] [2021-01-20 17:49:36,443 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 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 [2021-01-20 17:49:36,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:36,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:36,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:36,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:36,655 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:36,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:36,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:49:36,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125767789] [2021-01-20 17:49:36,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:36,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:36,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:36,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:36,666 INFO L87 Difference]: Start difference. First operand 100730 states and 293770 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2021-01-20 17:49:37,714 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-01-20 17:49:38,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:38,323 INFO L93 Difference]: Finished difference Result 108666 states and 316874 transitions. [2021-01-20 17:49:38,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 17:49:38,323 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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 48 [2021-01-20 17:49:38,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:38,324 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=509, Invalid=1653, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 17:49:38,325 INFO L78 Accepts]: Start accepts. Automaton has 108666 states and 316874 transitions. Word has length 48 [2021-01-20 17:49:38,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:38,325 INFO L481 AbstractCegarLoop]: Abstraction has 108666 states and 316874 transitions. [2021-01-20 17:49:38,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2021-01-20 17:49:38,325 INFO L276 IsEmpty]: Start isEmpty. Operand 108666 states and 316874 transitions. [2021-01-20 17:49:38,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:38,357 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:38,357 INFO L504 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, 1, 1] [2021-01-20 17:49:38,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:38,558 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:38,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:38,559 INFO L82 PathProgramCache]: Analyzing trace with hash 763359212, now seen corresponding path program 6 times [2021-01-20 17:49:38,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:38,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057859961] [2021-01-20 17:49:38,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:38,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057859961] [2021-01-20 17:49:38,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529113439] [2021-01-20 17:49:38,709 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 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 [2021-01-20 17:49:38,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-20 17:49:38,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:38,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:38,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:38,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:38,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:38,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-01-20 17:49:38,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11401345] [2021-01-20 17:49:38,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-20 17:49:38,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:38,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-20 17:49:38,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-01-20 17:49:38,965 INFO L87 Difference]: Start difference. First operand 108666 states and 316874 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2021-01-20 17:49:39,789 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-01-20 17:49:40,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:40,661 INFO L93 Difference]: Finished difference Result 115450 states and 336650 transitions. [2021-01-20 17:49:40,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-20 17:49:40,662 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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 48 [2021-01-20 17:49:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:40,662 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=468, Invalid=1424, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 17:49:40,663 INFO L78 Accepts]: Start accepts. Automaton has 115450 states and 336650 transitions. Word has length 48 [2021-01-20 17:49:40,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:40,663 INFO L481 AbstractCegarLoop]: Abstraction has 115450 states and 336650 transitions. [2021-01-20 17:49:40,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 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) [2021-01-20 17:49:40,663 INFO L276 IsEmpty]: Start isEmpty. Operand 115450 states and 336650 transitions. [2021-01-20 17:49:40,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-20 17:49:40,689 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:40,690 INFO L504 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, 1, 1] [2021-01-20 17:49:40,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-20 17:49:40,890 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:40,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:40,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1519359984, now seen corresponding path program 7 times [2021-01-20 17:49:40,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:40,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351679080] [2021-01-20 17:49:40,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:41,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351679080] [2021-01-20 17:49:41,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137738810] [2021-01-20 17:49:41,044 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 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 [2021-01-20 17:49:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:41,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-20 17:49:41,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:41,224 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:49:41,251 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:41,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:41,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-01-20 17:49:41,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997164308] [2021-01-20 17:49:41,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-20 17:49:41,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:41,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-20 17:49:41,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-01-20 17:49:41,266 INFO L87 Difference]: Start difference. First operand 115450 states and 336650 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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) [2021-01-20 17:49:41,876 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2021-01-20 17:49:44,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:44,346 INFO L93 Difference]: Finished difference Result 146426 states and 427210 transitions. [2021-01-20 17:49:44,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-20 17:49:44,347 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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 48 [2021-01-20 17:49:44,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:44,348 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1048, Invalid=3374, Unknown=0, NotChecked=0, Total=4422 [2021-01-20 17:49:44,348 INFO L78 Accepts]: Start accepts. Automaton has 146426 states and 427210 transitions. Word has length 48 [2021-01-20 17:49:44,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:44,348 INFO L481 AbstractCegarLoop]: Abstraction has 146426 states and 427210 transitions. [2021-01-20 17:49:44,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 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) [2021-01-20 17:49:44,349 INFO L276 IsEmpty]: Start isEmpty. Operand 146426 states and 427210 transitions. [2021-01-20 17:49:44,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:49:44,401 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:44,402 INFO L504 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-01-20 17:49:44,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:49:44,602 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:44,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:44,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1376333259, now seen corresponding path program 5 times [2021-01-20 17:49:44,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:44,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759571465] [2021-01-20 17:49:44,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:44,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759571465] [2021-01-20 17:49:44,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228776897] [2021-01-20 17:49:44,769 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 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 [2021-01-20 17:49:44,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 17:49:44,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:44,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:49:44,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:45,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:45,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:45,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:49:45,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349514824] [2021-01-20 17:49:45,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:49:45,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:45,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:49:45,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:49:45,037 INFO L87 Difference]: Start difference. First operand 146426 states and 427210 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:46,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:46,337 INFO L93 Difference]: Finished difference Result 147450 states and 430218 transitions. [2021-01-20 17:49:46,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-20 17:49:46,338 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:49:46,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:46,339 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2021-01-20 17:49:46,339 INFO L78 Accepts]: Start accepts. Automaton has 147450 states and 430218 transitions. Word has length 53 [2021-01-20 17:49:46,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:46,339 INFO L481 AbstractCegarLoop]: Abstraction has 147450 states and 430218 transitions. [2021-01-20 17:49:46,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:46,339 INFO L276 IsEmpty]: Start isEmpty. Operand 147450 states and 430218 transitions. [2021-01-20 17:49:46,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:49:46,417 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:46,417 INFO L504 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-01-20 17:49:46,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-20 17:49:46,618 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:46,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:46,619 INFO L82 PathProgramCache]: Analyzing trace with hash 372366749, now seen corresponding path program 6 times [2021-01-20 17:49:46,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:46,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9328653] [2021-01-20 17:49:46,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:46,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9328653] [2021-01-20 17:49:46,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187543768] [2021-01-20 17:49:46,787 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 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 [2021-01-20 17:49:46,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-20 17:49:46,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:46,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:49:46,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:47,051 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:49:47,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:47,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:47,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-20 17:49:47,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549436444] [2021-01-20 17:49:47,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-20 17:49:47,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:47,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-20 17:49:47,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-01-20 17:49:47,117 INFO L87 Difference]: Start difference. First operand 147450 states and 430218 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:49,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:49,027 INFO L93 Difference]: Finished difference Result 151610 states and 442378 transitions. [2021-01-20 17:49:49,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-20 17:49:49,028 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-01-20 17:49:49,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:49,029 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=450, Invalid=1442, Unknown=0, NotChecked=0, Total=1892 [2021-01-20 17:49:49,029 INFO L78 Accepts]: Start accepts. Automaton has 151610 states and 442378 transitions. Word has length 53 [2021-01-20 17:49:49,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:49,029 INFO L481 AbstractCegarLoop]: Abstraction has 151610 states and 442378 transitions. [2021-01-20 17:49:49,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-01-20 17:49:49,029 INFO L276 IsEmpty]: Start isEmpty. Operand 151610 states and 442378 transitions. [2021-01-20 17:49:49,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:49:49,088 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:49,089 INFO L504 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, 1, 1] [2021-01-20 17:49:49,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-20 17:49:49,298 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:49,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:49,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1523808235, now seen corresponding path program 8 times [2021-01-20 17:49:49,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:49,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163967692] [2021-01-20 17:49:49,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:49,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163967692] [2021-01-20 17:49:49,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191820298] [2021-01-20 17:49:49,464 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 [2021-01-20 17:49:49,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:49:49,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:49,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:49:49,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:49,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:49,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:49,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:49:49,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187266681] [2021-01-20 17:49:49,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:49:49,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:49,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:49:49,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:49:49,759 INFO L87 Difference]: Start difference. First operand 151610 states and 442378 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:49:51,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:51,686 INFO L93 Difference]: Finished difference Result 154746 states and 451530 transitions. [2021-01-20 17:49:51,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 17:49:51,687 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:49:51,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:51,688 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=479, Invalid=1591, Unknown=0, NotChecked=0, Total=2070 [2021-01-20 17:49:51,688 INFO L78 Accepts]: Start accepts. Automaton has 154746 states and 451530 transitions. Word has length 53 [2021-01-20 17:49:51,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:51,688 INFO L481 AbstractCegarLoop]: Abstraction has 154746 states and 451530 transitions. [2021-01-20 17:49:51,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:49:51,688 INFO L276 IsEmpty]: Start isEmpty. Operand 154746 states and 451530 transitions. [2021-01-20 17:49:52,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:49:52,261 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:52,262 INFO L504 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, 1, 1] [2021-01-20 17:49:52,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-20 17:49:52,476 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:52,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:52,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1287659999, now seen corresponding path program 9 times [2021-01-20 17:49:52,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:52,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847296246] [2021-01-20 17:49:52,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:52,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847296246] [2021-01-20 17:49:52,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114588787] [2021-01-20 17:49:52,630 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 [2021-01-20 17:49:52,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 17:49:52,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:52,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:49:52,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:52,914 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:52,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:52,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:49:52,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194994199] [2021-01-20 17:49:52,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:49:52,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:52,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:49:52,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:49:52,949 INFO L87 Difference]: Start difference. First operand 154746 states and 451530 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:49:54,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:54,907 INFO L93 Difference]: Finished difference Result 155514 states and 453770 transitions. [2021-01-20 17:49:54,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-20 17:49:54,908 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:49:54,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:54,909 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=475, Invalid=1687, Unknown=0, NotChecked=0, Total=2162 [2021-01-20 17:49:54,909 INFO L78 Accepts]: Start accepts. Automaton has 155514 states and 453770 transitions. Word has length 53 [2021-01-20 17:49:54,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:54,909 INFO L481 AbstractCegarLoop]: Abstraction has 155514 states and 453770 transitions. [2021-01-20 17:49:54,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:49:54,909 INFO L276 IsEmpty]: Start isEmpty. Operand 155514 states and 453770 transitions. [2021-01-20 17:49:54,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:49:54,980 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:54,981 INFO L504 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, 1, 1] [2021-01-20 17:49:55,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-20 17:49:55,182 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:55,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:55,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1715777465, now seen corresponding path program 10 times [2021-01-20 17:49:55,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:55,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048035501] [2021-01-20 17:49:55,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:55,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048035501] [2021-01-20 17:49:55,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283332691] [2021-01-20 17:49:55,390 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 [2021-01-20 17:49:55,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:49:55,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:55,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 17:49:55,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:55,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:49:55,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:55,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:55,723 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:55,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:55,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:49:55,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360461813] [2021-01-20 17:49:55,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:49:55,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:55,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:49:55,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:49:55,790 INFO L87 Difference]: Start difference. First operand 155514 states and 453770 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:49:58,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:49:58,677 INFO L93 Difference]: Finished difference Result 169466 states and 494602 transitions. [2021-01-20 17:49:58,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-20 17:49:58,677 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:49:58,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:49:58,678 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=869, Invalid=3037, Unknown=0, NotChecked=0, Total=3906 [2021-01-20 17:49:58,679 INFO L78 Accepts]: Start accepts. Automaton has 169466 states and 494602 transitions. Word has length 53 [2021-01-20 17:49:58,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:49:58,679 INFO L481 AbstractCegarLoop]: Abstraction has 169466 states and 494602 transitions. [2021-01-20 17:49:58,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:49:58,679 INFO L276 IsEmpty]: Start isEmpty. Operand 169466 states and 494602 transitions. [2021-01-20 17:49:58,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:49:58,734 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:49:58,735 INFO L504 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, 1, 1] [2021-01-20 17:49:58,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-20 17:49:58,936 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:49:58,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:49:58,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1870495507, now seen corresponding path program 11 times [2021-01-20 17:49:58,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:49:58,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939930759] [2021-01-20 17:49:58,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:49:58,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:49:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:59,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939930759] [2021-01-20 17:49:59,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001413851] [2021-01-20 17:49:59,099 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 [2021-01-20 17:49:59,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 17:49:59,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:49:59,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:49:59,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:49:59,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:59,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:59,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:49:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:49:59,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:49:59,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:49:59,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983628424] [2021-01-20 17:49:59,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:49:59,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:49:59,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:49:59,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:49:59,479 INFO L87 Difference]: Start difference. First operand 169466 states and 494602 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:01,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:01,869 INFO L93 Difference]: Finished difference Result 180410 states and 526474 transitions. [2021-01-20 17:50:01,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 17:50:01,870 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:50:01,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:01,871 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=576, Invalid=1874, Unknown=0, NotChecked=0, Total=2450 [2021-01-20 17:50:01,871 INFO L78 Accepts]: Start accepts. Automaton has 180410 states and 526474 transitions. Word has length 53 [2021-01-20 17:50:01,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:01,872 INFO L481 AbstractCegarLoop]: Abstraction has 180410 states and 526474 transitions. [2021-01-20 17:50:01,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:01,872 INFO L276 IsEmpty]: Start isEmpty. Operand 180410 states and 526474 transitions. [2021-01-20 17:50:01,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:01,935 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:01,935 INFO L504 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, 1, 1] [2021-01-20 17:50:02,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:02,136 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:02,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:02,137 INFO L82 PathProgramCache]: Analyzing trace with hash 601156231, now seen corresponding path program 12 times [2021-01-20 17:50:02,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:02,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869608918] [2021-01-20 17:50:02,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:02,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869608918] [2021-01-20 17:50:02,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715094858] [2021-01-20 17:50:02,303 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 [2021-01-20 17:50:02,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 17:50:02,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:02,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:02,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:02,985 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-01-20 17:50:03,188 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:03,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:03,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:03,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:03,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:03,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083977999] [2021-01-20 17:50:03,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:03,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:03,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:03,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:03,247 INFO L87 Difference]: Start difference. First operand 180410 states and 526474 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:05,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:05,925 INFO L93 Difference]: Finished difference Result 186042 states and 542858 transitions. [2021-01-20 17:50:05,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-20 17:50:05,925 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:50:05,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:05,927 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=674, Invalid=2406, Unknown=0, NotChecked=0, Total=3080 [2021-01-20 17:50:05,927 INFO L78 Accepts]: Start accepts. Automaton has 186042 states and 542858 transitions. Word has length 53 [2021-01-20 17:50:05,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:05,927 INFO L481 AbstractCegarLoop]: Abstraction has 186042 states and 542858 transitions. [2021-01-20 17:50:05,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:05,927 INFO L276 IsEmpty]: Start isEmpty. Operand 186042 states and 542858 transitions. [2021-01-20 17:50:06,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:06,000 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:06,001 INFO L504 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, 1, 1] [2021-01-20 17:50:06,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:06,215 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:06,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:06,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1971730201, now seen corresponding path program 13 times [2021-01-20 17:50:06,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:06,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046884343] [2021-01-20 17:50:06,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:06,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046884343] [2021-01-20 17:50:06,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471650884] [2021-01-20 17:50:06,411 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 [2021-01-20 17:50:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:06,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:06,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:06,743 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:06,746 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:06,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:06,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:06,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:06,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408939413] [2021-01-20 17:50:06,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:06,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:06,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:06,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:06,799 INFO L87 Difference]: Start difference. First operand 186042 states and 542858 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:09,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:09,691 INFO L93 Difference]: Finished difference Result 193210 states and 563722 transitions. [2021-01-20 17:50:09,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-20 17:50:09,692 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:50:09,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:09,693 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=695, Invalid=2385, Unknown=0, NotChecked=0, Total=3080 [2021-01-20 17:50:09,693 INFO L78 Accepts]: Start accepts. Automaton has 193210 states and 563722 transitions. Word has length 53 [2021-01-20 17:50:09,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:09,694 INFO L481 AbstractCegarLoop]: Abstraction has 193210 states and 563722 transitions. [2021-01-20 17:50:09,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:09,694 INFO L276 IsEmpty]: Start isEmpty. Operand 193210 states and 563722 transitions. [2021-01-20 17:50:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:09,758 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:09,758 INFO L504 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, 1, 1] [2021-01-20 17:50:09,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:09,967 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:09,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:09,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1215729429, now seen corresponding path program 14 times [2021-01-20 17:50:09,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:09,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765240230] [2021-01-20 17:50:09,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:10,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765240230] [2021-01-20 17:50:10,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441406999] [2021-01-20 17:50:10,146 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 [2021-01-20 17:50:10,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:50:10,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:10,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:10,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:10,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:50:10,532 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:10,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:10,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:10,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455120767] [2021-01-20 17:50:10,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:10,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:10,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:10,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:10,572 INFO L87 Difference]: Start difference. First operand 193210 states and 563722 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:14,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:14,761 INFO L93 Difference]: Finished difference Result 212986 states and 621514 transitions. [2021-01-20 17:50:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-20 17:50:14,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:50:14,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:14,765 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1810 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1177, Invalid=3935, Unknown=0, NotChecked=0, Total=5112 [2021-01-20 17:50:14,765 INFO L78 Accepts]: Start accepts. Automaton has 212986 states and 621514 transitions. Word has length 53 [2021-01-20 17:50:14,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:14,765 INFO L481 AbstractCegarLoop]: Abstraction has 212986 states and 621514 transitions. [2021-01-20 17:50:14,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:14,766 INFO L276 IsEmpty]: Start isEmpty. Operand 212986 states and 621514 transitions. [2021-01-20 17:50:15,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:15,446 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:15,446 INFO L504 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, 1, 1] [2021-01-20 17:50:15,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-20 17:50:15,647 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:15,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:15,647 INFO L82 PathProgramCache]: Analyzing trace with hash 680245205, now seen corresponding path program 15 times [2021-01-20 17:50:15,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:15,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110876531] [2021-01-20 17:50:15,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:15,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110876531] [2021-01-20 17:50:15,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749097158] [2021-01-20 17:50:15,817 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 [2021-01-20 17:50:15,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 17:50:15,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:15,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:15,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:16,098 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:16,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:16,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:16,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:16,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405446902] [2021-01-20 17:50:16,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:16,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:16,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:16,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:16,134 INFO L87 Difference]: Start difference. First operand 212986 states and 621514 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:18,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:18,753 INFO L93 Difference]: Finished difference Result 218746 states and 638282 transitions. [2021-01-20 17:50:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 17:50:18,754 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:50:18,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:18,755 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=636, Invalid=2016, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 17:50:18,756 INFO L78 Accepts]: Start accepts. Automaton has 218746 states and 638282 transitions. Word has length 53 [2021-01-20 17:50:18,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:18,756 INFO L481 AbstractCegarLoop]: Abstraction has 218746 states and 638282 transitions. [2021-01-20 17:50:18,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 218746 states and 638282 transitions. [2021-01-20 17:50:18,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:18,841 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:18,841 INFO L504 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, 1, 1] [2021-01-20 17:50:19,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:19,048 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:19,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:19,049 INFO L82 PathProgramCache]: Analyzing trace with hash 409323335, now seen corresponding path program 16 times [2021-01-20 17:50:19,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:19,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479544098] [2021-01-20 17:50:19,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:19,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479544098] [2021-01-20 17:50:19,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534461499] [2021-01-20 17:50:19,268 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 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 [2021-01-20 17:50:19,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:50:19,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:19,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 17:50:19,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:19,562 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:19,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:19,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:19,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210675583] [2021-01-20 17:50:19,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:19,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:19,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:19,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:19,607 INFO L87 Difference]: Start difference. First operand 218746 states and 638282 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:22,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:22,502 INFO L93 Difference]: Finished difference Result 225146 states and 657034 transitions. [2021-01-20 17:50:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-20 17:50:22,503 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:50:22,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:22,504 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=729, Invalid=2241, Unknown=0, NotChecked=0, Total=2970 [2021-01-20 17:50:22,504 INFO L78 Accepts]: Start accepts. Automaton has 225146 states and 657034 transitions. Word has length 53 [2021-01-20 17:50:22,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:22,504 INFO L481 AbstractCegarLoop]: Abstraction has 225146 states and 657034 transitions. [2021-01-20 17:50:22,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:22,505 INFO L276 IsEmpty]: Start isEmpty. Operand 225146 states and 657034 transitions. [2021-01-20 17:50:22,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:22,573 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:22,573 INFO L504 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, 1, 1] [2021-01-20 17:50:22,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-20 17:50:22,774 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:22,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:22,775 INFO L82 PathProgramCache]: Analyzing trace with hash -284076831, now seen corresponding path program 17 times [2021-01-20 17:50:22,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:22,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055398729] [2021-01-20 17:50:22,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:22,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055398729] [2021-01-20 17:50:22,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758808890] [2021-01-20 17:50:22,947 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 [2021-01-20 17:50:23,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 17:50:23,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:23,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:23,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:23,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:23,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:23,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:23,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407051977] [2021-01-20 17:50:23,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:23,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:23,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:23,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:23,269 INFO L87 Difference]: Start difference. First operand 225146 states and 657034 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:25,046 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-01-20 17:50:26,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:26,316 INFO L93 Difference]: Finished difference Result 232250 states and 677706 transitions. [2021-01-20 17:50:26,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-20 17:50:26,318 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:50:26,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:26,319 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=851, Invalid=3055, Unknown=0, NotChecked=0, Total=3906 [2021-01-20 17:50:26,320 INFO L78 Accepts]: Start accepts. Automaton has 232250 states and 677706 transitions. Word has length 53 [2021-01-20 17:50:26,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:26,320 INFO L481 AbstractCegarLoop]: Abstraction has 232250 states and 677706 transitions. [2021-01-20 17:50:26,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:26,320 INFO L276 IsEmpty]: Start isEmpty. Operand 232250 states and 677706 transitions. [2021-01-20 17:50:26,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:26,391 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:26,392 INFO L504 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, 1, 1] [2021-01-20 17:50:26,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:26,592 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:26,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:26,593 INFO L82 PathProgramCache]: Analyzing trace with hash -554998701, now seen corresponding path program 18 times [2021-01-20 17:50:26,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:26,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776466141] [2021-01-20 17:50:26,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:27,637 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2021-01-20 17:50:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:27,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776466141] [2021-01-20 17:50:27,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664391000] [2021-01-20 17:50:27,660 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 [2021-01-20 17:50:27,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 17:50:27,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:27,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:27,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:27,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:27,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:27,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:27,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779411639] [2021-01-20 17:50:27,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:27,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:27,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:27,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:27,985 INFO L87 Difference]: Start difference. First operand 232250 states and 677706 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:31,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:31,377 INFO L93 Difference]: Finished difference Result 243066 states and 709322 transitions. [2021-01-20 17:50:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-20 17:50:31,378 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:50:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:31,379 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1007, Invalid=3415, Unknown=0, NotChecked=0, Total=4422 [2021-01-20 17:50:31,379 INFO L78 Accepts]: Start accepts. Automaton has 243066 states and 709322 transitions. Word has length 53 [2021-01-20 17:50:31,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:31,379 INFO L481 AbstractCegarLoop]: Abstraction has 243066 states and 709322 transitions. [2021-01-20 17:50:31,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:31,380 INFO L276 IsEmpty]: Start isEmpty. Operand 243066 states and 709322 transitions. [2021-01-20 17:50:31,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:31,461 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:31,461 INFO L504 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, 1, 1] [2021-01-20 17:50:31,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-20 17:50:31,662 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:31,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:31,662 INFO L82 PathProgramCache]: Analyzing trace with hash -2036829567, now seen corresponding path program 19 times [2021-01-20 17:50:31,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:31,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688878241] [2021-01-20 17:50:31,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:31,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688878241] [2021-01-20 17:50:31,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126066790] [2021-01-20 17:50:31,840 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 [2021-01-20 17:50:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:31,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:31,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:32,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:32,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:32,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:32,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031269755] [2021-01-20 17:50:32,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:32,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:32,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:32,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:32,164 INFO L87 Difference]: Start difference. First operand 243066 states and 709322 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:35,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:35,460 INFO L93 Difference]: Finished difference Result 247290 states and 721610 transitions. [2021-01-20 17:50:35,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-20 17:50:35,465 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:50:35,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:35,466 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=977, Invalid=3313, Unknown=0, NotChecked=0, Total=4290 [2021-01-20 17:50:35,466 INFO L78 Accepts]: Start accepts. Automaton has 247290 states and 721610 transitions. Word has length 53 [2021-01-20 17:50:35,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:35,466 INFO L481 AbstractCegarLoop]: Abstraction has 247290 states and 721610 transitions. [2021-01-20 17:50:35,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:35,467 INFO L276 IsEmpty]: Start isEmpty. Operand 247290 states and 721610 transitions. [2021-01-20 17:50:35,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:35,552 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:35,552 INFO L504 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, 1, 1] [2021-01-20 17:50:35,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:50:35,766 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:35,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:35,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1606714029, now seen corresponding path program 20 times [2021-01-20 17:50:35,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:35,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601784701] [2021-01-20 17:50:35,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:35,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601784701] [2021-01-20 17:50:35,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747931682] [2021-01-20 17:50:35,932 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 [2021-01-20 17:50:35,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:50:35,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:36,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:36,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:36,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:36,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:36,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:36,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711163080] [2021-01-20 17:50:36,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:36,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:36,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:36,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:36,235 INFO L87 Difference]: Start difference. First operand 247290 states and 721610 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:37,356 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-01-20 17:50:39,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:39,873 INFO L93 Difference]: Finished difference Result 251898 states and 735050 transitions. [2021-01-20 17:50:39,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-20 17:50:39,879 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:50:39,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:39,884 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=798, Invalid=2624, Unknown=0, NotChecked=0, Total=3422 [2021-01-20 17:50:39,884 INFO L78 Accepts]: Start accepts. Automaton has 251898 states and 735050 transitions. Word has length 53 [2021-01-20 17:50:39,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:39,885 INFO L481 AbstractCegarLoop]: Abstraction has 251898 states and 735050 transitions. [2021-01-20 17:50:39,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:39,885 INFO L276 IsEmpty]: Start isEmpty. Operand 251898 states and 735050 transitions. [2021-01-20 17:50:40,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:40,042 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:40,043 INFO L504 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, 1, 1] [2021-01-20 17:50:40,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-20 17:50:40,259 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:40,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:40,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1932252495, now seen corresponding path program 21 times [2021-01-20 17:50:40,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:40,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139477221] [2021-01-20 17:50:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:40,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139477221] [2021-01-20 17:50:40,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852270596] [2021-01-20 17:50:40,430 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 [2021-01-20 17:50:40,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-20 17:50:40,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:40,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:40,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:40,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:50:40,716 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:40,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:40,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:40,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103531299] [2021-01-20 17:50:40,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:40,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:40,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:40,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:40,751 INFO L87 Difference]: Start difference. First operand 251898 states and 735050 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:45,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:45,007 INFO L93 Difference]: Finished difference Result 293242 states and 855946 transitions. [2021-01-20 17:50:45,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-20 17:50:45,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:50:45,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:45,008 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1379, Invalid=4627, Unknown=0, NotChecked=0, Total=6006 [2021-01-20 17:50:45,009 INFO L78 Accepts]: Start accepts. Automaton has 293242 states and 855946 transitions. Word has length 53 [2021-01-20 17:50:45,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:45,009 INFO L481 AbstractCegarLoop]: Abstraction has 293242 states and 855946 transitions. [2021-01-20 17:50:45,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:45,009 INFO L276 IsEmpty]: Start isEmpty. Operand 293242 states and 855946 transitions. [2021-01-20 17:50:45,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:45,084 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:45,085 INFO L504 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, 1, 1] [2021-01-20 17:50:45,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-20 17:50:45,285 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:45,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:45,286 INFO L82 PathProgramCache]: Analyzing trace with hash 75989787, now seen corresponding path program 22 times [2021-01-20 17:50:45,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:45,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025371702] [2021-01-20 17:50:45,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:45,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025371702] [2021-01-20 17:50:45,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086028856] [2021-01-20 17:50:45,483 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 [2021-01-20 17:50:45,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:50:45,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:45,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 17:50:45,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:45,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:45,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:45,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:45,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371124153] [2021-01-20 17:50:45,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:45,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:45,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:45,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:45,797 INFO L87 Difference]: Start difference. First operand 293242 states and 855946 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:50,650 INFO L93 Difference]: Finished difference Result 301818 states and 880906 transitions. [2021-01-20 17:50:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-20 17:50:50,651 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:50:50,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:50,652 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1913 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1257, Invalid=4293, Unknown=0, NotChecked=0, Total=5550 [2021-01-20 17:50:50,652 INFO L78 Accepts]: Start accepts. Automaton has 301818 states and 880906 transitions. Word has length 53 [2021-01-20 17:50:50,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:50,652 INFO L481 AbstractCegarLoop]: Abstraction has 301818 states and 880906 transitions. [2021-01-20 17:50:50,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:50,652 INFO L276 IsEmpty]: Start isEmpty. Operand 301818 states and 880906 transitions. [2021-01-20 17:50:50,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:50,719 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:50,719 INFO L504 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, 1, 1] [2021-01-20 17:50:50,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-20 17:50:50,920 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:50,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:50,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1798070651, now seen corresponding path program 23 times [2021-01-20 17:50:50,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:50,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871889520] [2021-01-20 17:50:50,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:51,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871889520] [2021-01-20 17:50:51,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389004596] [2021-01-20 17:50:51,083 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 [2021-01-20 17:50:51,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-20 17:50:51,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:51,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:51,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:51,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:51,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:51,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:51,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426254247] [2021-01-20 17:50:51,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:51,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:51,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:51,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:51,421 INFO L87 Difference]: Start difference. First operand 301818 states and 880906 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:55,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:50:55,242 INFO L93 Difference]: Finished difference Result 316410 states and 923402 transitions. [2021-01-20 17:50:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-20 17:50:55,243 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:50:55,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:50:55,243 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=999, Invalid=3291, Unknown=0, NotChecked=0, Total=4290 [2021-01-20 17:50:55,244 INFO L78 Accepts]: Start accepts. Automaton has 316410 states and 923402 transitions. Word has length 53 [2021-01-20 17:50:55,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:50:55,244 INFO L481 AbstractCegarLoop]: Abstraction has 316410 states and 923402 transitions. [2021-01-20 17:50:55,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:50:55,244 INFO L276 IsEmpty]: Start isEmpty. Operand 316410 states and 923402 transitions. [2021-01-20 17:50:55,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:50:55,315 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:50:55,315 INFO L504 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, 1, 1] [2021-01-20 17:50:55,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-01-20 17:50:55,516 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:50:55,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:50:55,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1740895873, now seen corresponding path program 24 times [2021-01-20 17:50:55,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:50:55,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83361786] [2021-01-20 17:50:55,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:50:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:50:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:55,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83361786] [2021-01-20 17:50:55,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493046508] [2021-01-20 17:50:55,703 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 [2021-01-20 17:50:55,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-20 17:50:55,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:50:55,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:50:55,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:50:55,953 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:50:56,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:50:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:50:56,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:50:56,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:50:56,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240140150] [2021-01-20 17:50:56,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:50:56,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:50:56,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:50:56,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:50:56,793 INFO L87 Difference]: Start difference. First operand 316410 states and 923402 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:51:02,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:02,740 INFO L93 Difference]: Finished difference Result 365242 states and 1066378 transitions. [2021-01-20 17:51:02,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-01-20 17:51:02,741 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:51:02,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:02,742 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2526 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1614, Invalid=5192, Unknown=0, NotChecked=0, Total=6806 [2021-01-20 17:51:02,742 INFO L78 Accepts]: Start accepts. Automaton has 365242 states and 1066378 transitions. Word has length 53 [2021-01-20 17:51:02,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:02,743 INFO L481 AbstractCegarLoop]: Abstraction has 365242 states and 1066378 transitions. [2021-01-20 17:51:02,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:51:02,743 INFO L276 IsEmpty]: Start isEmpty. Operand 365242 states and 1066378 transitions. [2021-01-20 17:51:02,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:51:02,808 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:02,808 INFO L504 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, 1, 1] [2021-01-20 17:51:03,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:03,009 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:03,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:03,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1299793979, now seen corresponding path program 25 times [2021-01-20 17:51:03,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:03,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102762771] [2021-01-20 17:51:03,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:03,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102762771] [2021-01-20 17:51:03,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368954602] [2021-01-20 17:51:03,236 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 [2021-01-20 17:51:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:03,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:51:03,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:03,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:03,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:03,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:51:03,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010250965] [2021-01-20 17:51:03,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:51:03,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:03,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:51:03,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:51:03,599 INFO L87 Difference]: Start difference. First operand 365242 states and 1066378 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:51:07,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:07,409 INFO L93 Difference]: Finished difference Result 383162 states and 1118730 transitions. [2021-01-20 17:51:07,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-20 17:51:07,410 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:51:07,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:07,411 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2021-01-20 17:51:07,411 INFO L78 Accepts]: Start accepts. Automaton has 383162 states and 1118730 transitions. Word has length 53 [2021-01-20 17:51:07,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:07,411 INFO L481 AbstractCegarLoop]: Abstraction has 383162 states and 1118730 transitions. [2021-01-20 17:51:07,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:51:07,411 INFO L276 IsEmpty]: Start isEmpty. Operand 383162 states and 1118730 transitions. [2021-01-20 17:51:07,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:51:07,505 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:07,505 INFO L504 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, 1, 1] [2021-01-20 17:51:07,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-20 17:51:07,719 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:07,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:07,720 INFO L82 PathProgramCache]: Analyzing trace with hash 880108089, now seen corresponding path program 26 times [2021-01-20 17:51:07,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:07,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699516835] [2021-01-20 17:51:07,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:07,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:07,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699516835] [2021-01-20 17:51:07,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406623854] [2021-01-20 17:51:07,882 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 [2021-01-20 17:51:07,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:51:07,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:07,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:51:07,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:08,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:08,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:08,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:51:08,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562487333] [2021-01-20 17:51:08,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:51:08,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:08,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:51:08,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:51:08,195 INFO L87 Difference]: Start difference. First operand 383162 states and 1118730 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:51:11,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:11,562 INFO L93 Difference]: Finished difference Result 399994 states and 1167946 transitions. [2021-01-20 17:51:11,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 17:51:11,563 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:51:11,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:11,570 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=663, Invalid=1887, Unknown=0, NotChecked=0, Total=2550 [2021-01-20 17:51:11,570 INFO L78 Accepts]: Start accepts. Automaton has 399994 states and 1167946 transitions. Word has length 53 [2021-01-20 17:51:11,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:11,571 INFO L481 AbstractCegarLoop]: Abstraction has 399994 states and 1167946 transitions. [2021-01-20 17:51:11,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:51:11,571 INFO L276 IsEmpty]: Start isEmpty. Operand 399994 states and 1167946 transitions. [2021-01-20 17:51:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:51:11,641 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:11,641 INFO L504 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, 1, 1] [2021-01-20 17:51:11,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-20 17:51:11,842 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:11,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:11,843 INFO L82 PathProgramCache]: Analyzing trace with hash -958412647, now seen corresponding path program 27 times [2021-01-20 17:51:11,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:11,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091816478] [2021-01-20 17:51:11,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:12,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091816478] [2021-01-20 17:51:12,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240834767] [2021-01-20 17:51:12,016 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 [2021-01-20 17:51:12,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-20 17:51:12,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:12,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:51:12,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:12,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:12,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:12,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:51:12,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760490324] [2021-01-20 17:51:12,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:51:12,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:12,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:51:12,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:51:12,304 INFO L87 Difference]: Start difference. First operand 399994 states and 1167946 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:51:16,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:16,623 INFO L93 Difference]: Finished difference Result 401786 states and 1173194 transitions. [2021-01-20 17:51:16,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-20 17:51:16,624 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:51:16,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:16,624 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=620, Invalid=1930, Unknown=0, NotChecked=0, Total=2550 [2021-01-20 17:51:16,624 INFO L78 Accepts]: Start accepts. Automaton has 401786 states and 1173194 transitions. Word has length 53 [2021-01-20 17:51:16,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:16,625 INFO L481 AbstractCegarLoop]: Abstraction has 401786 states and 1173194 transitions. [2021-01-20 17:51:16,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:51:16,625 INFO L276 IsEmpty]: Start isEmpty. Operand 401786 states and 1173194 transitions. [2021-01-20 17:51:16,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:51:16,698 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:16,698 INFO L504 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, 1, 1] [2021-01-20 17:51:16,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:16,899 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:16,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:16,899 INFO L82 PathProgramCache]: Analyzing trace with hash -270011115, now seen corresponding path program 28 times [2021-01-20 17:51:16,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:16,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85006784] [2021-01-20 17:51:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:17,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85006784] [2021-01-20 17:51:17,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706973548] [2021-01-20 17:51:17,059 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 [2021-01-20 17:51:17,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:51:17,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:17,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-20 17:51:17,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:17,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:17,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:17,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:51:17,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968440658] [2021-01-20 17:51:17,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:51:17,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:17,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:51:17,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:51:17,336 INFO L87 Difference]: Start difference. First operand 401786 states and 1173194 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:51:20,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:20,928 INFO L93 Difference]: Finished difference Result 402618 states and 1175626 transitions. [2021-01-20 17:51:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-20 17:51:20,929 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:51:20,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:20,929 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=758, Invalid=2434, Unknown=0, NotChecked=0, Total=3192 [2021-01-20 17:51:20,929 INFO L78 Accepts]: Start accepts. Automaton has 402618 states and 1175626 transitions. Word has length 53 [2021-01-20 17:51:20,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:20,930 INFO L481 AbstractCegarLoop]: Abstraction has 402618 states and 1175626 transitions. [2021-01-20 17:51:20,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:51:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 402618 states and 1175626 transitions. [2021-01-20 17:51:22,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:51:22,007 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:22,008 INFO L504 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, 1, 1] [2021-01-20 17:51:22,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-20 17:51:22,222 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:22,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:22,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1452069749, now seen corresponding path program 29 times [2021-01-20 17:51:22,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:22,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778523987] [2021-01-20 17:51:22,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:22,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778523987] [2021-01-20 17:51:22,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304295895] [2021-01-20 17:51:22,397 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 [2021-01-20 17:51:22,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:51:22,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:22,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:51:22,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:22,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:22,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:22,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:51:22,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829693337] [2021-01-20 17:51:22,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:51:22,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:22,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:51:22,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:51:22,726 INFO L87 Difference]: Start difference. First operand 402618 states and 1175626 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:51:27,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:27,058 INFO L93 Difference]: Finished difference Result 407802 states and 1190730 transitions. [2021-01-20 17:51:27,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-20 17:51:27,059 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:51:27,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:27,060 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=707, Invalid=2263, Unknown=0, NotChecked=0, Total=2970 [2021-01-20 17:51:27,060 INFO L78 Accepts]: Start accepts. Automaton has 407802 states and 1190730 transitions. Word has length 53 [2021-01-20 17:51:27,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:27,060 INFO L481 AbstractCegarLoop]: Abstraction has 407802 states and 1190730 transitions. [2021-01-20 17:51:27,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:51:27,060 INFO L276 IsEmpty]: Start isEmpty. Operand 407802 states and 1190730 transitions. [2021-01-20 17:51:27,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-20 17:51:27,169 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:27,169 INFO L504 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, 1, 1] [2021-01-20 17:51:27,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:27,383 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:27,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:27,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2086896775, now seen corresponding path program 30 times [2021-01-20 17:51:27,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:27,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759537497] [2021-01-20 17:51:27,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:28,688 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-01-20 17:51:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:28,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759537497] [2021-01-20 17:51:28,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637715108] [2021-01-20 17:51:28,823 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 [2021-01-20 17:51:28,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-20 17:51:28,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:28,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-20 17:51:28,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:29,199 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:51:29,223 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:29,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:29,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-20 17:51:29,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864759826] [2021-01-20 17:51:29,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-20 17:51:29,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:29,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-20 17:51:29,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-01-20 17:51:29,248 INFO L87 Difference]: Start difference. First operand 407802 states and 1190730 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:51:34,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:34,343 INFO L93 Difference]: Finished difference Result 432634 states and 1263370 transitions. [2021-01-20 17:51:34,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-20 17:51:34,344 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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 53 [2021-01-20 17:51:34,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:34,346 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1924 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1271, Invalid=4131, Unknown=0, NotChecked=0, Total=5402 [2021-01-20 17:51:34,346 INFO L78 Accepts]: Start accepts. Automaton has 432634 states and 1263370 transitions. Word has length 53 [2021-01-20 17:51:34,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:34,346 INFO L481 AbstractCegarLoop]: Abstraction has 432634 states and 1263370 transitions. [2021-01-20 17:51:34,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 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) [2021-01-20 17:51:34,346 INFO L276 IsEmpty]: Start isEmpty. Operand 432634 states and 1263370 transitions. [2021-01-20 17:51:34,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:51:34,586 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:34,586 INFO L504 BasicCegarLoop]: trace histogram [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] [2021-01-20 17:51:34,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-20 17:51:34,799 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:34,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:34,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2038569245, now seen corresponding path program 3 times [2021-01-20 17:51:34,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:34,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13070255] [2021-01-20 17:51:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:35,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13070255] [2021-01-20 17:51:35,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460831852] [2021-01-20 17:51:35,213 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 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 [2021-01-20 17:51:36,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-20 17:51:36,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:36,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:51:36,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:36,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:36,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:36,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:36,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:51:36,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814353108] [2021-01-20 17:51:36,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:51:36,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:36,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:51:36,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:51:36,452 INFO L87 Difference]: Start difference. First operand 432634 states and 1263370 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 17:51:40,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:40,166 INFO L93 Difference]: Finished difference Result 442602 states and 1292266 transitions. [2021-01-20 17:51:40,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 17:51:40,167 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 17:51:40,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:40,167 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=417, Invalid=1143, Unknown=0, NotChecked=0, Total=1560 [2021-01-20 17:51:40,168 INFO L78 Accepts]: Start accepts. Automaton has 442602 states and 1292266 transitions. Word has length 58 [2021-01-20 17:51:40,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:40,168 INFO L481 AbstractCegarLoop]: Abstraction has 442602 states and 1292266 transitions. [2021-01-20 17:51:40,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 17:51:40,168 INFO L276 IsEmpty]: Start isEmpty. Operand 442602 states and 1292266 transitions. [2021-01-20 17:51:40,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:51:40,481 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:40,481 INFO L504 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-01-20 17:51:40,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-20 17:51:40,694 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:40,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:40,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1808185776, now seen corresponding path program 7 times [2021-01-20 17:51:40,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:40,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988655043] [2021-01-20 17:51:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:41,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988655043] [2021-01-20 17:51:41,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495920545] [2021-01-20 17:51:41,046 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 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 [2021-01-20 17:51:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:41,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:51:41,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:41,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:41,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:41,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:51:41,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554358827] [2021-01-20 17:51:41,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:51:41,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:41,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:51:41,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:51:41,638 INFO L87 Difference]: Start difference. First operand 442602 states and 1292266 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 17:51:46,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:46,293 INFO L93 Difference]: Finished difference Result 443690 states and 1295466 transitions. [2021-01-20 17:51:46,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-20 17:51:46,298 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 17:51:46,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:46,298 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=354, Invalid=1128, Unknown=0, NotChecked=0, Total=1482 [2021-01-20 17:51:46,298 INFO L78 Accepts]: Start accepts. Automaton has 443690 states and 1295466 transitions. Word has length 58 [2021-01-20 17:51:46,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:46,299 INFO L481 AbstractCegarLoop]: Abstraction has 443690 states and 1295466 transitions. [2021-01-20 17:51:46,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 17:51:46,299 INFO L276 IsEmpty]: Start isEmpty. Operand 443690 states and 1295466 transitions. [2021-01-20 17:51:46,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:51:46,635 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:46,635 INFO L504 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-01-20 17:51:46,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-20 17:51:46,848 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:46,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:46,848 INFO L82 PathProgramCache]: Analyzing trace with hash 804219266, now seen corresponding path program 8 times [2021-01-20 17:51:46,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:46,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968591366] [2021-01-20 17:51:46,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:47,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968591366] [2021-01-20 17:51:47,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158490829] [2021-01-20 17:51:47,098 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 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 [2021-01-20 17:51:47,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:51:47,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:47,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:51:47,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:47,396 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:51:47,443 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:47,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:47,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 17:51:47,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890920777] [2021-01-20 17:51:47,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 17:51:47,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:47,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 17:51:47,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-01-20 17:51:47,464 INFO L87 Difference]: Start difference. First operand 443690 states and 1295466 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 17:51:51,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:51,728 INFO L93 Difference]: Finished difference Result 449322 states and 1311914 transitions. [2021-01-20 17:51:51,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-20 17:51:51,729 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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 58 [2021-01-20 17:51:51,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:51,730 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=556, Invalid=1796, Unknown=0, NotChecked=0, Total=2352 [2021-01-20 17:51:51,730 INFO L78 Accepts]: Start accepts. Automaton has 449322 states and 1311914 transitions. Word has length 58 [2021-01-20 17:51:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:51,730 INFO L481 AbstractCegarLoop]: Abstraction has 449322 states and 1311914 transitions. [2021-01-20 17:51:51,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 17:51:51,731 INFO L276 IsEmpty]: Start isEmpty. Operand 449322 states and 1311914 transitions. [2021-01-20 17:51:51,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:51:51,994 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:51,995 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 17:51:52,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-01-20 17:51:52,207 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:52,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:52,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1091955718, now seen corresponding path program 31 times [2021-01-20 17:51:52,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:52,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442322444] [2021-01-20 17:51:52,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:53,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442322444] [2021-01-20 17:51:53,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835784166] [2021-01-20 17:51:53,397 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 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 [2021-01-20 17:51:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:53,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:51:53,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:54,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:54,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:54,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:51:54,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373456650] [2021-01-20 17:51:54,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:51:54,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:54,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:51:54,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:51:54,268 INFO L87 Difference]: Start difference. First operand 449322 states and 1311914 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 17:51:58,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:51:58,289 INFO L93 Difference]: Finished difference Result 452586 states and 1321450 transitions. [2021-01-20 17:51:58,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-20 17:51:58,290 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 17:51:58,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:51:58,291 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=605, Invalid=2047, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 17:51:58,291 INFO L78 Accepts]: Start accepts. Automaton has 452586 states and 1321450 transitions. Word has length 58 [2021-01-20 17:51:58,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:51:58,291 INFO L481 AbstractCegarLoop]: Abstraction has 452586 states and 1321450 transitions. [2021-01-20 17:51:58,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 17:51:58,292 INFO L276 IsEmpty]: Start isEmpty. Operand 452586 states and 1321450 transitions. [2021-01-20 17:51:58,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:51:58,529 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:51:58,529 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 17:51:58,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:51:58,743 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:51:58,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:51:58,744 INFO L82 PathProgramCache]: Analyzing trace with hash -855807482, now seen corresponding path program 32 times [2021-01-20 17:51:58,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:51:58,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228687730] [2021-01-20 17:51:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:51:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:51:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:58,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228687730] [2021-01-20 17:51:58,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600078416] [2021-01-20 17:51:58,969 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 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 [2021-01-20 17:51:59,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-20 17:51:59,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:51:59,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:51:59,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:51:59,289 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:51:59,325 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:51:59,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:51:59,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:51:59,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29305021] [2021-01-20 17:51:59,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:51:59,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:51:59,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:51:59,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:51:59,332 INFO L87 Difference]: Start difference. First operand 452586 states and 1321450 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 17:52:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:52:04,518 INFO L93 Difference]: Finished difference Result 453354 states and 1323690 transitions. [2021-01-20 17:52:04,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-20 17:52:04,520 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 17:52:04,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:52:04,520 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=573, Invalid=2079, Unknown=0, NotChecked=0, Total=2652 [2021-01-20 17:52:04,527 INFO L78 Accepts]: Start accepts. Automaton has 453354 states and 1323690 transitions. Word has length 58 [2021-01-20 17:52:04,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:52:04,528 INFO L481 AbstractCegarLoop]: Abstraction has 453354 states and 1323690 transitions. [2021-01-20 17:52:04,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 17:52:04,528 INFO L276 IsEmpty]: Start isEmpty. Operand 453354 states and 1323690 transitions. [2021-01-20 17:52:04,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:52:04,758 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:52:04,758 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 17:52:04,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-20 17:52:04,973 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:52:04,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:52:04,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1283924948, now seen corresponding path program 33 times [2021-01-20 17:52:04,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:52:04,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929448604] [2021-01-20 17:52:04,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:52:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:52:05,376 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-01-20 17:52:05,632 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-01-20 17:52:05,917 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-01-20 17:52:06,252 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-01-20 17:52:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:52:06,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929448604] [2021-01-20 17:52:06,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103677974] [2021-01-20 17:52:06,455 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 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 [2021-01-20 17:52:06,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-20 17:52:06,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:52:06,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:52:06,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:52:06,806 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-20 17:52:06,858 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:52:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:52:06,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:52:06,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-20 17:52:06,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543411070] [2021-01-20 17:52:06,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-20 17:52:06,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:52:06,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-20 17:52:06,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-01-20 17:52:06,873 INFO L87 Difference]: Start difference. First operand 453354 states and 1323690 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 17:52:12,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:52:12,488 INFO L93 Difference]: Finished difference Result 465322 states and 1358634 transitions. [2021-01-20 17:52:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-20 17:52:12,489 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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 58 [2021-01-20 17:52:12,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:52:12,490 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=804, Invalid=2736, Unknown=0, NotChecked=0, Total=3540 [2021-01-20 17:52:12,490 INFO L78 Accepts]: Start accepts. Automaton has 465322 states and 1358634 transitions. Word has length 58 [2021-01-20 17:52:12,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:52:12,492 INFO L481 AbstractCegarLoop]: Abstraction has 465322 states and 1358634 transitions. [2021-01-20 17:52:12,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 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) [2021-01-20 17:52:12,492 INFO L276 IsEmpty]: Start isEmpty. Operand 465322 states and 1358634 transitions. [2021-01-20 17:52:12,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:52:12,843 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:52:12,843 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 17:52:13,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-20 17:52:13,062 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:52:13,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:52:13,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1992619272, now seen corresponding path program 34 times [2021-01-20 17:52:13,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:52:13,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455715254] [2021-01-20 17:52:13,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:52:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:52:13,308 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:52:13,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455715254] [2021-01-20 17:52:13,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188333040] [2021-01-20 17:52:13,308 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 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 [2021-01-20 17:52:13,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-20 17:52:13,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:52:13,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-20 17:52:13,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:52:13,815 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:52:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:52:13,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:52:13,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:52:13,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683148564] [2021-01-20 17:52:13,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:52:13,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:52:13,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:52:13,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:52:13,931 INFO L87 Difference]: Start difference. First operand 465322 states and 1358634 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 17:52:15,006 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-01-20 17:52:15,787 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-01-20 17:52:28,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-20 17:52:28,416 INFO L93 Difference]: Finished difference Result 469866 states and 1371882 transitions. [2021-01-20 17:52:28,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-20 17:52:28,420 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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 58 [2021-01-20 17:52:28,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-20 17:52:28,421 INFO L769 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=701, Invalid=2379, Unknown=0, NotChecked=0, Total=3080 [2021-01-20 17:52:28,421 INFO L78 Accepts]: Start accepts. Automaton has 469866 states and 1371882 transitions. Word has length 58 [2021-01-20 17:52:28,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-20 17:52:28,421 INFO L481 AbstractCegarLoop]: Abstraction has 469866 states and 1371882 transitions. [2021-01-20 17:52:28,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2021-01-20 17:52:28,421 INFO L276 IsEmpty]: Start isEmpty. Operand 469866 states and 1371882 transitions. [2021-01-20 17:52:28,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-20 17:52:28,958 INFO L496 BasicCegarLoop]: Found error trace [2021-01-20 17:52:28,958 INFO L504 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-01-20 17:52:29,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-20 17:52:29,158 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-20 17:52:29,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-20 17:52:29,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1033008748, now seen corresponding path program 35 times [2021-01-20 17:52:29,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-20 17:52:29,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338637385] [2021-01-20 17:52:29,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-20 17:52:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-20 17:52:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:52:29,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338637385] [2021-01-20 17:52:29,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188687751] [2021-01-20 17:52:29,389 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 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 [2021-01-20 17:52:29,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-20 17:52:29,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-20 17:52:29,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-20 17:52:29,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-20 17:52:30,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-20 17:52:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-20 17:52:30,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-20 17:52:30,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-01-20 17:52:30,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988387017] [2021-01-20 17:52:30,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-20 17:52:30,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-20 17:52:30,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-20 17:52:30,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-01-20 17:52:30,199 INFO L87 Difference]: Start difference. First operand 469866 states and 1371882 transitions. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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)