/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_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-aa1e80b [2020-12-17 20:23:49,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-17 20:23:49,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-17 20:23:49,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-17 20:23:49,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-17 20:23:49,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-17 20:23:49,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-17 20:23:49,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-17 20:23:49,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-17 20:23:49,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-17 20:23:49,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-17 20:23:49,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-17 20:23:49,969 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-17 20:23:49,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-17 20:23:49,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-17 20:23:49,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-17 20:23:49,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-17 20:23:49,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-17 20:23:49,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-17 20:23:49,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-17 20:23:49,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-17 20:23:50,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-17 20:23:50,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-17 20:23:50,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-17 20:23:50,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-17 20:23:50,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-17 20:23:50,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-17 20:23:50,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-17 20:23:50,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-17 20:23:50,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-17 20:23:50,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-17 20:23:50,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-17 20:23:50,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-17 20:23:50,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-17 20:23:50,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-17 20:23:50,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-17 20:23:50,029 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 [2020-12-17 20:23:50,083 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-17 20:23:50,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-17 20:23:50,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-17 20:23:50,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-17 20:23:50,089 INFO L138 SettingsManager]: * Use SBE=true [2020-12-17 20:23:50,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-17 20:23:50,089 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-17 20:23:50,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-17 20:23:50,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-17 20:23:50,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-17 20:23:50,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-17 20:23:50,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-17 20:23:50,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-17 20:23:50,092 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-17 20:23:50,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-17 20:23:50,092 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-17 20:23:50,093 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-17 20:23:50,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-17 20:23:50,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-17 20:23:50,093 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-17 20:23:50,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-17 20:23:50,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-17 20:23:50,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-17 20:23:50,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-17 20:23:50,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-17 20:23:50,095 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-17 20:23:50,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-17 20:23:50,095 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-12-17 20:23:50,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-17 20:23:50,096 INFO L138 SettingsManager]: * Remove dead ends from automaton=false [2020-12-17 20:23:50,096 INFO L138 SettingsManager]: * Minimization of abstraction=NONE [2020-12-17 20:23:50,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-17 20:23:50,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-17 20:23:50,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-17 20:23:50,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-17 20:23:50,539 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-17 20:23:50,540 INFO L275 PluginConnector]: CDTParser initialized [2020-12-17 20:23:50,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-12-17 20:23:50,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/402e44ad8/49c07f323fbc43c3ac6f464697c023b7/FLAG58b94aca4 [2020-12-17 20:23:51,279 INFO L306 CDTParser]: Found 1 translation units. [2020-12-17 20:23:51,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-12-17 20:23:51,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/402e44ad8/49c07f323fbc43c3ac6f464697c023b7/FLAG58b94aca4 [2020-12-17 20:23:51,582 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/402e44ad8/49c07f323fbc43c3ac6f464697c023b7 [2020-12-17 20:23:51,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-17 20:23:51,590 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-12-17 20:23:51,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-17 20:23:51,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-17 20:23:51,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-17 20:23:51,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:23:51" (1/1) ... [2020-12-17 20:23:51,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c314fdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:23:51, skipping insertion in model container [2020-12-17 20:23:51,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:23:51" (1/1) ... [2020-12-17 20:23:51,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-17 20:23:51,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-17 20:23:52,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-17 20:23:52,226 INFO L203 MainTranslator]: Completed pre-run [2020-12-17 20:23:52,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-17 20:23:52,352 INFO L208 MainTranslator]: Completed translation [2020-12-17 20:23:52,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:23:52 WrapperNode [2020-12-17 20:23:52,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-17 20:23:52,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-17 20:23:52,355 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-17 20:23:52,355 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-17 20:23:52,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:23:52" (1/1) ... [2020-12-17 20:23:52,381 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:23:52" (1/1) ... [2020-12-17 20:23:52,402 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-17 20:23:52,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-17 20:23:52,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-17 20:23:52,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-17 20:23:52,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:23:52" (1/1) ... [2020-12-17 20:23:52,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:23:52" (1/1) ... [2020-12-17 20:23:52,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:23:52" (1/1) ... [2020-12-17 20:23:52,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:23:52" (1/1) ... [2020-12-17 20:23:52,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:23:52" (1/1) ... [2020-12-17 20:23:52,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:23:52" (1/1) ... [2020-12-17 20:23:52,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:23:52" (1/1) ... [2020-12-17 20:23:52,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-17 20:23:52,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-17 20:23:52,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-17 20:23:52,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-17 20:23:52,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:23:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-17 20:23:52,532 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-12-17 20:23:52,533 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-12-17 20:23:52,533 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-12-17 20:23:52,534 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-12-17 20:23:52,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-17 20:23:52,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-17 20:23:52,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-17 20:23:52,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-17 20:23:52,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-17 20:23:52,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-17 20:23:52,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-17 20:23:52,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-17 20:23:52,538 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-17 20:23:52,913 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-17 20:23:52,914 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-17 20:23:52,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:23:52 BoogieIcfgContainer [2020-12-17 20:23:52,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-17 20:23:52,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-17 20:23:52,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-17 20:23:52,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-17 20:23:52,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 08:23:51" (1/3) ... [2020-12-17 20:23:52,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b21996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:23:52, skipping insertion in model container [2020-12-17 20:23:52,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:23:52" (2/3) ... [2020-12-17 20:23:52,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b21996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:23:52, skipping insertion in model container [2020-12-17 20:23:52,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:23:52" (3/3) ... [2020-12-17 20:23:52,926 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2020-12-17 20:23:52,944 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-17 20:23:52,944 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-17 20:23:52,948 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-17 20:23:52,949 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-17 20:23:53,010 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,012 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,013 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,013 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,013 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,014 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,014 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,014 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,014 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,015 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,017 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,018 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,018 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,018 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,019 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,019 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,019 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,019 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,020 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,025 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,026 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,026 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,026 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,027 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,027 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,027 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,028 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,028 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,028 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,028 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,029 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,029 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,029 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,030 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,030 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,030 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,030 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,030 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,031 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,031 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,032 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,032 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,032 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,033 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,033 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,033 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,033 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,034 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,034 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,034 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,035 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,035 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,035 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,035 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,035 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,036 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,036 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,036 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,036 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,036 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,039 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,040 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,040 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,040 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,040 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,040 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,047 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,047 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,048 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,048 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,048 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,048 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-17 20:23:53,052 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-17 20:23:53,067 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-17 20:23:53,095 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-17 20:23:53,095 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-17 20:23:53,095 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-17 20:23:53,095 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-17 20:23:53,095 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-17 20:23:53,096 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-17 20:23:53,096 INFO L383 AbstractCegarLoop]: Minimize is NONE [2020-12-17 20:23:53,096 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-17 20:23:53,109 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 66 transitions, 142 flow [2020-12-17 20:23:53,268 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) [2020-12-17 20:23:53,281 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) [2020-12-17 20:23:53,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-17 20:23:53,297 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:23:53,298 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] [2020-12-17 20:23:53,298 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:23:53,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:23:53,306 INFO L82 PathProgramCache]: Analyzing trace with hash 2143390317, now seen corresponding path program 1 times [2020-12-17 20:23:53,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:23:53,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231433428] [2020-12-17 20:23:53,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:23:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:23:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:23:53,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231433428] [2020-12-17 20:23:53,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:23:53,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-17 20:23:53,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748501244] [2020-12-17 20:23:53,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-17 20:23:53,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:23:53,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-17 20:23:53,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-17 20:23:53,958 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) [2020-12-17 20:23:54,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:23:54,172 INFO L93 Difference]: Finished difference Result 4034 states and 11738 transitions. [2020-12-17 20:23:54,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-17 20:23:54,174 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2020-12-17 20:23:54,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:23:54,176 INFO L763 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 [2020-12-17 20:23:54,176 INFO L78 Accepts]: Start accepts. Automaton has 4034 states and 11738 transitions. Word has length 28 [2020-12-17 20:23:54,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:23:54,178 INFO L481 AbstractCegarLoop]: Abstraction has 4034 states and 11738 transitions. [2020-12-17 20:23:54,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:23:54,178 INFO L276 IsEmpty]: Start isEmpty. Operand 4034 states and 11738 transitions. [2020-12-17 20:23:54,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-17 20:23:54,188 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:23:54,188 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] [2020-12-17 20:23:54,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-17 20:23:54,189 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:23:54,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:23:54,190 INFO L82 PathProgramCache]: Analyzing trace with hash 409143693, now seen corresponding path program 1 times [2020-12-17 20:23:54,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:23:54,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354204260] [2020-12-17 20:23:54,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:23:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:23:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:23:54,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354204260] [2020-12-17 20:23:54,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:23:54,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-17 20:23:54,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471129323] [2020-12-17 20:23:54,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-17 20:23:54,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:23:54,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-17 20:23:54,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-17 20:23:54,414 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) [2020-12-17 20:23:54,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:23:54,614 INFO L93 Difference]: Finished difference Result 5570 states and 16218 transitions. [2020-12-17 20:23:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-17 20:23:54,614 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 [2020-12-17 20:23:54,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:23:54,616 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-17 20:23:54,616 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 16218 transitions. Word has length 33 [2020-12-17 20:23:54,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:23:54,617 INFO L481 AbstractCegarLoop]: Abstraction has 5570 states and 16218 transitions. [2020-12-17 20:23:54,617 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) [2020-12-17 20:23:54,618 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 16218 transitions. [2020-12-17 20:23:54,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-17 20:23:54,621 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:23:54,622 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] [2020-12-17 20:23:54,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-17 20:23:54,622 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:23:54,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:23:54,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1822434001, now seen corresponding path program 2 times [2020-12-17 20:23:54,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:23:54,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698255144] [2020-12-17 20:23:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:23:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:23:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:23:54,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698255144] [2020-12-17 20:23:54,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:23:54,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-17 20:23:54,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349259050] [2020-12-17 20:23:54,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-17 20:23:54,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:23:54,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-17 20:23:54,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-17 20:23:54,754 INFO L87 Difference]: Start difference. First operand 5570 states and 16218 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) [2020-12-17 20:23:55,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:23:55,045 INFO L93 Difference]: Finished difference Result 7106 states and 20698 transitions. [2020-12-17 20:23:55,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-17 20:23:55,046 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 [2020-12-17 20:23:55,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:23:55,047 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-17 20:23:55,047 INFO L78 Accepts]: Start accepts. Automaton has 7106 states and 20698 transitions. Word has length 33 [2020-12-17 20:23:55,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:23:55,048 INFO L481 AbstractCegarLoop]: Abstraction has 7106 states and 20698 transitions. [2020-12-17 20:23:55,048 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) [2020-12-17 20:23:55,048 INFO L276 IsEmpty]: Start isEmpty. Operand 7106 states and 20698 transitions. [2020-12-17 20:23:55,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-17 20:23:55,053 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:23:55,054 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] [2020-12-17 20:23:55,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-17 20:23:55,054 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:23:55,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:23:55,055 INFO L82 PathProgramCache]: Analyzing trace with hash 26886563, now seen corresponding path program 1 times [2020-12-17 20:23:55,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:23:55,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489118043] [2020-12-17 20:23:55,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:23:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:23:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:23:55,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489118043] [2020-12-17 20:23:55,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:23:55,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-17 20:23:55,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217382444] [2020-12-17 20:23:55,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-17 20:23:55,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:23:55,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-17 20:23:55,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-17 20:23:55,280 INFO L87 Difference]: Start difference. First operand 7106 states and 20698 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) [2020-12-17 20:23:55,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:23:55,498 INFO L93 Difference]: Finished difference Result 9242 states and 26890 transitions. [2020-12-17 20:23:55,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-17 20:23:55,499 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 [2020-12-17 20:23:55,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:23:55,500 INFO L763 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 [2020-12-17 20:23:55,500 INFO L78 Accepts]: Start accepts. Automaton has 9242 states and 26890 transitions. Word has length 33 [2020-12-17 20:23:55,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:23:55,501 INFO L481 AbstractCegarLoop]: Abstraction has 9242 states and 26890 transitions. [2020-12-17 20:23:55,501 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) [2020-12-17 20:23:55,501 INFO L276 IsEmpty]: Start isEmpty. Operand 9242 states and 26890 transitions. [2020-12-17 20:23:55,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-17 20:23:55,510 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:23:55,510 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] [2020-12-17 20:23:55,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-17 20:23:55,510 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:23:55,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:23:55,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1836185505, now seen corresponding path program 1 times [2020-12-17 20:23:55,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:23:55,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624462285] [2020-12-17 20:23:55,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:23:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:23:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:23:55,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624462285] [2020-12-17 20:23:55,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:23:55,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-17 20:23:55,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075986416] [2020-12-17 20:23:55,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-17 20:23:55,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:23:55,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-17 20:23:55,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-17 20:23:55,634 INFO L87 Difference]: Start difference. First operand 9242 states and 26890 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) [2020-12-17 20:23:55,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:23:55,841 INFO L93 Difference]: Finished difference Result 10010 states and 29130 transitions. [2020-12-17 20:23:55,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-17 20:23:55,842 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 [2020-12-17 20:23:55,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:23:55,843 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:23:55,843 INFO L78 Accepts]: Start accepts. Automaton has 10010 states and 29130 transitions. Word has length 38 [2020-12-17 20:23:55,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:23:55,843 INFO L481 AbstractCegarLoop]: Abstraction has 10010 states and 29130 transitions. [2020-12-17 20:23:55,844 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) [2020-12-17 20:23:55,844 INFO L276 IsEmpty]: Start isEmpty. Operand 10010 states and 29130 transitions. [2020-12-17 20:23:55,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-17 20:23:55,853 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:23:55,853 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] [2020-12-17 20:23:55,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-17 20:23:55,853 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:23:55,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:23:55,854 INFO L82 PathProgramCache]: Analyzing trace with hash 703073151, now seen corresponding path program 2 times [2020-12-17 20:23:55,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:23:55,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268626522] [2020-12-17 20:23:55,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:23:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:23:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:23:55,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268626522] [2020-12-17 20:23:55,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:23:55,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-17 20:23:55,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212733708] [2020-12-17 20:23:55,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-17 20:23:55,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:23:55,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-17 20:23:55,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-17 20:23:55,972 INFO L87 Difference]: Start difference. First operand 10010 states and 29130 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) [2020-12-17 20:23:56,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:23:56,408 INFO L93 Difference]: Finished difference Result 14042 states and 40906 transitions. [2020-12-17 20:23:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-17 20:23:56,409 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 [2020-12-17 20:23:56,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:23:56,410 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:23:56,410 INFO L78 Accepts]: Start accepts. Automaton has 14042 states and 40906 transitions. Word has length 38 [2020-12-17 20:23:56,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:23:56,411 INFO L481 AbstractCegarLoop]: Abstraction has 14042 states and 40906 transitions. [2020-12-17 20:23:56,411 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) [2020-12-17 20:23:56,411 INFO L276 IsEmpty]: Start isEmpty. Operand 14042 states and 40906 transitions. [2020-12-17 20:23:56,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-17 20:23:56,425 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:23:56,425 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] [2020-12-17 20:23:56,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-17 20:23:56,426 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:23:56,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:23:56,426 INFO L82 PathProgramCache]: Analyzing trace with hash -127797699, now seen corresponding path program 3 times [2020-12-17 20:23:56,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:23:56,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201283590] [2020-12-17 20:23:56,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:23:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:23:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:23:56,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201283590] [2020-12-17 20:23:56,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-17 20:23:56,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-17 20:23:56,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767993074] [2020-12-17 20:23:56,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-17 20:23:56,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:23:56,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-17 20:23:56,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-17 20:23:56,542 INFO L87 Difference]: Start difference. First operand 14042 states and 40906 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) [2020-12-17 20:23:57,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:23:57,017 INFO L93 Difference]: Finished difference Result 18178 states and 52922 transitions. [2020-12-17 20:23:57,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-17 20:23:57,018 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 [2020-12-17 20:23:57,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:23:57,019 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:23:57,019 INFO L78 Accepts]: Start accepts. Automaton has 18178 states and 52922 transitions. Word has length 38 [2020-12-17 20:23:57,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:23:57,020 INFO L481 AbstractCegarLoop]: Abstraction has 18178 states and 52922 transitions. [2020-12-17 20:23:57,020 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) [2020-12-17 20:23:57,020 INFO L276 IsEmpty]: Start isEmpty. Operand 18178 states and 52922 transitions. [2020-12-17 20:23:57,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-17 20:23:57,046 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:23:57,047 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] [2020-12-17 20:23:57,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-17 20:23:57,048 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:23:57,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:23:57,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1809094268, now seen corresponding path program 1 times [2020-12-17 20:23:57,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:23:57,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196687998] [2020-12-17 20:23:57,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:23:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:23:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:23:57,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196687998] [2020-12-17 20:23:57,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548454888] [2020-12-17 20:23:57,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:23:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:23:57,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-17 20:23:57,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:23:57,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:23:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:23:57,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:23:57,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-12-17 20:23:57,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751426040] [2020-12-17 20:23:57,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:23:57,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:23:57,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:23:57,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:23:57,580 INFO L87 Difference]: Start difference. First operand 18178 states and 52922 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) [2020-12-17 20:23:58,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:23:58,099 INFO L93 Difference]: Finished difference Result 21378 states and 62266 transitions. [2020-12-17 20:23:58,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-17 20:23:58,100 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 [2020-12-17 20:23:58,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:23:58,102 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2020-12-17 20:23:58,102 INFO L78 Accepts]: Start accepts. Automaton has 21378 states and 62266 transitions. Word has length 43 [2020-12-17 20:23:58,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:23:58,107 INFO L481 AbstractCegarLoop]: Abstraction has 21378 states and 62266 transitions. [2020-12-17 20:23:58,108 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) [2020-12-17 20:23:58,108 INFO L276 IsEmpty]: Start isEmpty. Operand 21378 states and 62266 transitions. [2020-12-17 20:23:58,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-17 20:23:58,129 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:23:58,130 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] [2020-12-17 20:23:58,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-17 20:23:58,345 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:23:58,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:23:58,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1432941800, now seen corresponding path program 2 times [2020-12-17 20:23:58,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:23:58,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967586867] [2020-12-17 20:23:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:23:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:23:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:23:58,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967586867] [2020-12-17 20:23:58,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37683189] [2020-12-17 20:23:58,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:23:58,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:23:58,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:23:58,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-17 20:23:58,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:23:58,805 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:23:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:23:58,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:23:58,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-12-17 20:23:58,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587953487] [2020-12-17 20:23:58,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:23:58,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:23:58,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:23:58,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:23:58,828 INFO L87 Difference]: Start difference. First operand 21378 states and 62266 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) [2020-12-17 20:23:59,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:23:59,437 INFO L93 Difference]: Finished difference Result 22210 states and 64698 transitions. [2020-12-17 20:23:59,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-17 20:23:59,437 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 [2020-12-17 20:23:59,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:23:59,438 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2020-12-17 20:23:59,438 INFO L78 Accepts]: Start accepts. Automaton has 22210 states and 64698 transitions. Word has length 43 [2020-12-17 20:23:59,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:23:59,439 INFO L481 AbstractCegarLoop]: Abstraction has 22210 states and 64698 transitions. [2020-12-17 20:23:59,439 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) [2020-12-17 20:23:59,439 INFO L276 IsEmpty]: Start isEmpty. Operand 22210 states and 64698 transitions. [2020-12-17 20:23:59,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-17 20:23:59,457 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:23:59,457 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] [2020-12-17 20:23:59,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:23:59,671 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:23:59,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:23:59,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1083428478, now seen corresponding path program 3 times [2020-12-17 20:23:59,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:23:59,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870829784] [2020-12-17 20:23:59,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:23:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:23:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:23:59,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870829784] [2020-12-17 20:23:59,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245518883] [2020-12-17 20:23:59,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:23:59,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-17 20:23:59,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:23:59,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-17 20:23:59,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:23:59,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:00,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:00,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-12-17 20:24:00,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137754470] [2020-12-17 20:24:00,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:24:00,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:00,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:24:00,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:24:00,023 INFO L87 Difference]: Start difference. First operand 22210 states and 64698 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) [2020-12-17 20:24:00,202 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-12-17 20:24:00,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:00,595 INFO L93 Difference]: Finished difference Result 25282 states and 73658 transitions. [2020-12-17 20:24:00,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-17 20:24:00,596 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 [2020-12-17 20:24:00,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:00,597 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2020-12-17 20:24:00,597 INFO L78 Accepts]: Start accepts. Automaton has 25282 states and 73658 transitions. Word has length 43 [2020-12-17 20:24:00,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:00,598 INFO L481 AbstractCegarLoop]: Abstraction has 25282 states and 73658 transitions. [2020-12-17 20:24:00,598 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) [2020-12-17 20:24:00,598 INFO L276 IsEmpty]: Start isEmpty. Operand 25282 states and 73658 transitions. [2020-12-17 20:24:00,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-17 20:24:00,745 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:00,746 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] [2020-12-17 20:24:00,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-17 20:24:00,952 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:00,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:00,953 INFO L82 PathProgramCache]: Analyzing trace with hash 615590430, now seen corresponding path program 4 times [2020-12-17 20:24:00,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:00,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121867035] [2020-12-17 20:24:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:01,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121867035] [2020-12-17 20:24:01,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309443665] [2020-12-17 20:24:01,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:01,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:24:01,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:24:01,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:24:01,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:01,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:01,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:01,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:01,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-17 20:24:01,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201473247] [2020-12-17 20:24:01,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:24:01,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:01,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:24:01,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:24:01,419 INFO L87 Difference]: Start difference. First operand 25282 states and 73658 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:24:02,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:02,281 INFO L93 Difference]: Finished difference Result 37506 states and 109306 transitions. [2020-12-17 20:24:02,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-17 20:24:02,282 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2020-12-17 20:24:02,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:02,283 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=870, Unknown=0, NotChecked=0, Total=1190 [2020-12-17 20:24:02,283 INFO L78 Accepts]: Start accepts. Automaton has 37506 states and 109306 transitions. Word has length 43 [2020-12-17 20:24:02,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:02,284 INFO L481 AbstractCegarLoop]: Abstraction has 37506 states and 109306 transitions. [2020-12-17 20:24:02,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:24:02,284 INFO L276 IsEmpty]: Start isEmpty. Operand 37506 states and 109306 transitions. [2020-12-17 20:24:02,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-17 20:24:02,300 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:02,300 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] [2020-12-17 20:24:02,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:02,515 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:02,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:02,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1442221188, now seen corresponding path program 5 times [2020-12-17 20:24:02,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:02,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621676404] [2020-12-17 20:24:02,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:02,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621676404] [2020-12-17 20:24:02,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009646506] [2020-12-17 20:24:02,652 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:02,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:24:02,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:24:02,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-17 20:24:02,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:02,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:02,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:02,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-12-17 20:24:02,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434325550] [2020-12-17 20:24:02,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-17 20:24:02,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:02,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-17 20:24:02,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-12-17 20:24:02,868 INFO L87 Difference]: Start difference. First operand 37506 states and 109306 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) [2020-12-17 20:24:03,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:03,684 INFO L93 Difference]: Finished difference Result 42930 states and 125114 transitions. [2020-12-17 20:24:03,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-17 20:24:03,684 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 [2020-12-17 20:24:03,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:03,685 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=791, Unknown=0, NotChecked=0, Total=1056 [2020-12-17 20:24:03,685 INFO L78 Accepts]: Start accepts. Automaton has 42930 states and 125114 transitions. Word has length 43 [2020-12-17 20:24:03,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:03,686 INFO L481 AbstractCegarLoop]: Abstraction has 42930 states and 125114 transitions. [2020-12-17 20:24:03,686 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) [2020-12-17 20:24:03,686 INFO L276 IsEmpty]: Start isEmpty. Operand 42930 states and 125114 transitions. [2020-12-17 20:24:03,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-17 20:24:03,702 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:03,702 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] [2020-12-17 20:24:03,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-17 20:24:03,903 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:03,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:03,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1439455800, now seen corresponding path program 6 times [2020-12-17 20:24:03,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:03,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502173646] [2020-12-17 20:24:03,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:04,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502173646] [2020-12-17 20:24:04,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010887748] [2020-12-17 20:24:04,173 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:04,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-17 20:24:04,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:24:04,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-17 20:24:04,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:04,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:24:04,442 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:04,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:04,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-17 20:24:04,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284641659] [2020-12-17 20:24:04,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-17 20:24:04,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:04,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-17 20:24:04,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-12-17 20:24:04,491 INFO L87 Difference]: Start difference. First operand 42930 states and 125114 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:24:06,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:06,242 INFO L93 Difference]: Finished difference Result 64026 states and 186858 transitions. [2020-12-17 20:24:06,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-17 20:24:06,243 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2020-12-17 20:24:06,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:06,244 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=615, Invalid=1935, Unknown=0, NotChecked=0, Total=2550 [2020-12-17 20:24:06,244 INFO L78 Accepts]: Start accepts. Automaton has 64026 states and 186858 transitions. Word has length 43 [2020-12-17 20:24:06,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:06,245 INFO L481 AbstractCegarLoop]: Abstraction has 64026 states and 186858 transitions. [2020-12-17 20:24:06,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:24:06,245 INFO L276 IsEmpty]: Start isEmpty. Operand 64026 states and 186858 transitions. [2020-12-17 20:24:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-17 20:24:06,281 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:06,281 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] [2020-12-17 20:24:06,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:06,496 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:06,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:06,497 INFO L82 PathProgramCache]: Analyzing trace with hash -397305581, now seen corresponding path program 7 times [2020-12-17 20:24:06,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:06,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916317117] [2020-12-17 20:24:06,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:06,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916317117] [2020-12-17 20:24:06,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657720040] [2020-12-17 20:24:06,664 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:06,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-17 20:24:06,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:06,976 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:06,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:06,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-12-17 20:24:06,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006351997] [2020-12-17 20:24:06,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:24:06,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:06,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:24:06,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:24:06,992 INFO L87 Difference]: Start difference. First operand 64026 states and 186858 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) [2020-12-17 20:24:08,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:08,026 INFO L93 Difference]: Finished difference Result 71642 states and 209066 transitions. [2020-12-17 20:24:08,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-17 20:24:08,027 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 [2020-12-17 20:24:08,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:08,028 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=381, Invalid=1025, Unknown=0, NotChecked=0, Total=1406 [2020-12-17 20:24:08,028 INFO L78 Accepts]: Start accepts. Automaton has 71642 states and 209066 transitions. Word has length 48 [2020-12-17 20:24:08,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:08,028 INFO L481 AbstractCegarLoop]: Abstraction has 71642 states and 209066 transitions. [2020-12-17 20:24:08,028 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) [2020-12-17 20:24:08,028 INFO L276 IsEmpty]: Start isEmpty. Operand 71642 states and 209066 transitions. [2020-12-17 20:24:08,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-17 20:24:08,060 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:08,060 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] [2020-12-17 20:24:08,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-17 20:24:08,276 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:08,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2054932487, now seen corresponding path program 1 times [2020-12-17 20:24:08,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:08,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438725803] [2020-12-17 20:24:08,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:08,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438725803] [2020-12-17 20:24:08,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837664167] [2020-12-17 20:24:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:08,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-17 20:24:08,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:08,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:08,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:08,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-12-17 20:24:08,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023110124] [2020-12-17 20:24:08,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:24:08,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:08,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:24:08,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:24:08,734 INFO L87 Difference]: Start difference. First operand 71642 states and 209066 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) [2020-12-17 20:24:10,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:10,042 INFO L93 Difference]: Finished difference Result 74650 states and 217834 transitions. [2020-12-17 20:24:10,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-17 20:24:10,043 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 [2020-12-17 20:24:10,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:10,045 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=400, Invalid=1160, Unknown=0, NotChecked=0, Total=1560 [2020-12-17 20:24:10,045 INFO L78 Accepts]: Start accepts. Automaton has 74650 states and 217834 transitions. Word has length 48 [2020-12-17 20:24:10,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:10,046 INFO L481 AbstractCegarLoop]: Abstraction has 74650 states and 217834 transitions. [2020-12-17 20:24:10,047 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) [2020-12-17 20:24:10,047 INFO L276 IsEmpty]: Start isEmpty. Operand 74650 states and 217834 transitions. [2020-12-17 20:24:10,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-17 20:24:10,079 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:10,080 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] [2020-12-17 20:24:10,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-17 20:24:10,294 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:10,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:10,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1656816609, now seen corresponding path program 2 times [2020-12-17 20:24:10,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:10,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624142366] [2020-12-17 20:24:10,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:10,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624142366] [2020-12-17 20:24:10,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201223613] [2020-12-17 20:24:10,460 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:10,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:24:10,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:24:10,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-17 20:24:10,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:10,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:10,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:10,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-12-17 20:24:10,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220598405] [2020-12-17 20:24:10,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:24:10,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:10,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:24:10,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:24:10,729 INFO L87 Difference]: Start difference. First operand 74650 states and 217834 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) [2020-12-17 20:24:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:11,750 INFO L93 Difference]: Finished difference Result 77338 states and 225706 transitions. [2020-12-17 20:24:11,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-17 20:24:11,751 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 [2020-12-17 20:24:11,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:11,752 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2020-12-17 20:24:11,752 INFO L78 Accepts]: Start accepts. Automaton has 77338 states and 225706 transitions. Word has length 48 [2020-12-17 20:24:11,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:11,752 INFO L481 AbstractCegarLoop]: Abstraction has 77338 states and 225706 transitions. [2020-12-17 20:24:11,753 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) [2020-12-17 20:24:11,753 INFO L276 IsEmpty]: Start isEmpty. Operand 77338 states and 225706 transitions. [2020-12-17 20:24:12,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-17 20:24:12,023 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:12,023 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] [2020-12-17 20:24:12,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-17 20:24:12,224 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:12,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:12,225 INFO L82 PathProgramCache]: Analyzing trace with hash 203636825, now seen corresponding path program 8 times [2020-12-17 20:24:12,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:12,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527770161] [2020-12-17 20:24:12,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:12,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527770161] [2020-12-17 20:24:12,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554555115] [2020-12-17 20:24:12,368 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:12,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:24:12,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:24:12,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-17 20:24:12,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:12,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:12,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:12,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-12-17 20:24:12,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140986133] [2020-12-17 20:24:12,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:24:12,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:12,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:24:12,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:24:12,656 INFO L87 Difference]: Start difference. First operand 77338 states and 225706 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) [2020-12-17 20:24:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:14,099 INFO L93 Difference]: Finished difference Result 84698 states and 247146 transitions. [2020-12-17 20:24:14,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-17 20:24:14,099 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 [2020-12-17 20:24:14,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:14,100 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=423, Invalid=1137, Unknown=0, NotChecked=0, Total=1560 [2020-12-17 20:24:14,100 INFO L78 Accepts]: Start accepts. Automaton has 84698 states and 247146 transitions. Word has length 48 [2020-12-17 20:24:14,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:14,101 INFO L481 AbstractCegarLoop]: Abstraction has 84698 states and 247146 transitions. [2020-12-17 20:24:14,101 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) [2020-12-17 20:24:14,101 INFO L276 IsEmpty]: Start isEmpty. Operand 84698 states and 247146 transitions. [2020-12-17 20:24:14,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-17 20:24:14,143 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:14,143 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] [2020-12-17 20:24:14,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-17 20:24:14,357 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:14,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:14,358 INFO L82 PathProgramCache]: Analyzing trace with hash -243091131, now seen corresponding path program 9 times [2020-12-17 20:24:14,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:14,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009666588] [2020-12-17 20:24:14,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:14,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009666588] [2020-12-17 20:24:14,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137684372] [2020-12-17 20:24:14,520 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:14,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-17 20:24:14,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:24:14,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-17 20:24:14,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:14,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:14,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:14,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-12-17 20:24:14,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645976719] [2020-12-17 20:24:14,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:24:14,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:14,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:24:14,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:24:14,769 INFO L87 Difference]: Start difference. First operand 84698 states and 247146 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) [2020-12-17 20:24:16,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:16,301 INFO L93 Difference]: Finished difference Result 93722 states and 273450 transitions. [2020-12-17 20:24:16,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-17 20:24:16,302 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 [2020-12-17 20:24:16,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:16,303 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=492, Invalid=1488, Unknown=0, NotChecked=0, Total=1980 [2020-12-17 20:24:16,303 INFO L78 Accepts]: Start accepts. Automaton has 93722 states and 273450 transitions. Word has length 48 [2020-12-17 20:24:16,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:16,303 INFO L481 AbstractCegarLoop]: Abstraction has 93722 states and 273450 transitions. [2020-12-17 20:24:16,303 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) [2020-12-17 20:24:16,304 INFO L276 IsEmpty]: Start isEmpty. Operand 93722 states and 273450 transitions. [2020-12-17 20:24:16,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-17 20:24:16,342 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:16,342 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] [2020-12-17 20:24:16,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-17 20:24:16,558 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:16,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:16,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1170199177, now seen corresponding path program 10 times [2020-12-17 20:24:16,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:16,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673097995] [2020-12-17 20:24:16,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:16,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673097995] [2020-12-17 20:24:16,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929809123] [2020-12-17 20:24:16,690 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:16,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:24:16,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:24:16,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-17 20:24:16,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:16,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:24:16,891 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:16,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:16,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-12-17 20:24:16,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168987357] [2020-12-17 20:24:16,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-17 20:24:16,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:16,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-17 20:24:16,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-17 20:24:16,902 INFO L87 Difference]: Start difference. First operand 93722 states and 273450 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) [2020-12-17 20:24:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:19,184 INFO L93 Difference]: Finished difference Result 115802 states and 337898 transitions. [2020-12-17 20:24:19,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-17 20:24:19,185 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 [2020-12-17 20:24:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:19,186 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=667, Invalid=1883, Unknown=0, NotChecked=0, Total=2550 [2020-12-17 20:24:19,187 INFO L78 Accepts]: Start accepts. Automaton has 115802 states and 337898 transitions. Word has length 48 [2020-12-17 20:24:19,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:19,187 INFO L481 AbstractCegarLoop]: Abstraction has 115802 states and 337898 transitions. [2020-12-17 20:24:19,188 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) [2020-12-17 20:24:19,188 INFO L276 IsEmpty]: Start isEmpty. Operand 115802 states and 337898 transitions. [2020-12-17 20:24:19,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-17 20:24:19,231 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:19,231 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] [2020-12-17 20:24:19,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:19,438 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:19,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:19,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1533122351, now seen corresponding path program 3 times [2020-12-17 20:24:19,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:19,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672272031] [2020-12-17 20:24:19,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:19,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672272031] [2020-12-17 20:24:19,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752120517] [2020-12-17 20:24:19,573 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:19,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-17 20:24:19,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:24:19,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-17 20:24:19,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:19,817 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:19,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:19,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-12-17 20:24:19,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389903303] [2020-12-17 20:24:19,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:24:19,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:19,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:24:19,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:24:19,830 INFO L87 Difference]: Start difference. First operand 115802 states and 337898 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) [2020-12-17 20:24:21,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:21,805 INFO L93 Difference]: Finished difference Result 124378 states and 362922 transitions. [2020-12-17 20:24:21,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-17 20:24:21,806 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 [2020-12-17 20:24:21,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:21,807 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=536, Invalid=1720, Unknown=0, NotChecked=0, Total=2256 [2020-12-17 20:24:21,808 INFO L78 Accepts]: Start accepts. Automaton has 124378 states and 362922 transitions. Word has length 48 [2020-12-17 20:24:21,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:21,809 INFO L481 AbstractCegarLoop]: Abstraction has 124378 states and 362922 transitions. [2020-12-17 20:24:21,809 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) [2020-12-17 20:24:21,809 INFO L276 IsEmpty]: Start isEmpty. Operand 124378 states and 362922 transitions. [2020-12-17 20:24:21,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-17 20:24:21,843 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:21,843 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] [2020-12-17 20:24:22,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-12-17 20:24:22,044 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:22,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:22,045 INFO L82 PathProgramCache]: Analyzing trace with hash -119832043, now seen corresponding path program 4 times [2020-12-17 20:24:22,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:22,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199567674] [2020-12-17 20:24:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:22,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199567674] [2020-12-17 20:24:22,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908771945] [2020-12-17 20:24:22,191 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:22,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:24:22,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:24:22,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-17 20:24:22,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:22,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:24:22,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:22,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:22,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-12-17 20:24:22,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139296821] [2020-12-17 20:24:22,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:24:22,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:22,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:24:22,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:24:22,412 INFO L87 Difference]: Start difference. First operand 124378 states and 362922 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) [2020-12-17 20:24:25,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:25,078 INFO L93 Difference]: Finished difference Result 155874 states and 454866 transitions. [2020-12-17 20:24:25,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-17 20:24:25,079 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 [2020-12-17 20:24:25,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:25,080 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1048, Invalid=3374, Unknown=0, NotChecked=0, Total=4422 [2020-12-17 20:24:25,081 INFO L78 Accepts]: Start accepts. Automaton has 155874 states and 454866 transitions. Word has length 48 [2020-12-17 20:24:25,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:25,081 INFO L481 AbstractCegarLoop]: Abstraction has 155874 states and 454866 transitions. [2020-12-17 20:24:25,081 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) [2020-12-17 20:24:25,081 INFO L276 IsEmpty]: Start isEmpty. Operand 155874 states and 454866 transitions. [2020-12-17 20:24:25,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-17 20:24:25,140 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:25,140 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] [2020-12-17 20:24:25,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:25,341 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:25,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:25,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1755085526, now seen corresponding path program 5 times [2020-12-17 20:24:25,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:25,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514770792] [2020-12-17 20:24:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:25,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:25,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514770792] [2020-12-17 20:24:25,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307046834] [2020-12-17 20:24:25,499 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:25,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-17 20:24:25,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:24:25,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:24:25,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:26,278 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:26,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:26,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:26,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:26,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-17 20:24:26,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246573619] [2020-12-17 20:24:26,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:24:26,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:26,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:24:26,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:24:26,342 INFO L87 Difference]: Start difference. First operand 155874 states and 454866 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) [2020-12-17 20:24:28,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:28,010 INFO L93 Difference]: Finished difference Result 159266 states and 464786 transitions. [2020-12-17 20:24:28,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-17 20:24:28,011 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 [2020-12-17 20:24:28,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:28,012 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2020-12-17 20:24:28,012 INFO L78 Accepts]: Start accepts. Automaton has 159266 states and 464786 transitions. Word has length 53 [2020-12-17 20:24:28,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:28,012 INFO L481 AbstractCegarLoop]: Abstraction has 159266 states and 464786 transitions. [2020-12-17 20:24:28,012 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) [2020-12-17 20:24:28,012 INFO L276 IsEmpty]: Start isEmpty. Operand 159266 states and 464786 transitions. [2020-12-17 20:24:28,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-17 20:24:28,084 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:28,084 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] [2020-12-17 20:24:28,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-17 20:24:28,285 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:28,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:28,286 INFO L82 PathProgramCache]: Analyzing trace with hash 144817900, now seen corresponding path program 6 times [2020-12-17 20:24:28,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:28,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009234111] [2020-12-17 20:24:28,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:28,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009234111] [2020-12-17 20:24:28,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459175746] [2020-12-17 20:24:28,469 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:28,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-17 20:24:28,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:24:28,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:24:28,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:28,744 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:28,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:28,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:28,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-17 20:24:28,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371532274] [2020-12-17 20:24:28,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:24:28,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:28,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:24:28,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:24:28,792 INFO L87 Difference]: Start difference. First operand 159266 states and 464786 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) [2020-12-17 20:24:30,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:30,786 INFO L93 Difference]: Finished difference Result 162594 states and 474578 transitions. [2020-12-17 20:24:30,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-17 20:24:30,786 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 [2020-12-17 20:24:30,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:30,787 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2020-12-17 20:24:30,787 INFO L78 Accepts]: Start accepts. Automaton has 162594 states and 474578 transitions. Word has length 53 [2020-12-17 20:24:30,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:30,788 INFO L481 AbstractCegarLoop]: Abstraction has 162594 states and 474578 transitions. [2020-12-17 20:24:30,788 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) [2020-12-17 20:24:30,788 INFO L276 IsEmpty]: Start isEmpty. Operand 162594 states and 474578 transitions. [2020-12-17 20:24:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-17 20:24:30,851 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:30,852 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] [2020-12-17 20:24:31,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:31,053 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:31,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:31,053 INFO L82 PathProgramCache]: Analyzing trace with hash -253297978, now seen corresponding path program 7 times [2020-12-17 20:24:31,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:31,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859530861] [2020-12-17 20:24:31,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:31,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859530861] [2020-12-17 20:24:31,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936162794] [2020-12-17 20:24:31,221 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:31,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:24:31,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:31,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:31,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:31,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-17 20:24:31,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065801077] [2020-12-17 20:24:31,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:24:31,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:31,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:24:31,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:24:31,528 INFO L87 Difference]: Start difference. First operand 162594 states and 474578 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) [2020-12-17 20:24:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:33,314 INFO L93 Difference]: Finished difference Result 165858 states and 484114 transitions. [2020-12-17 20:24:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-17 20:24:33,315 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 [2020-12-17 20:24:33,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:33,316 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=1347, Unknown=0, NotChecked=0, Total=1806 [2020-12-17 20:24:33,316 INFO L78 Accepts]: Start accepts. Automaton has 165858 states and 484114 transitions. Word has length 53 [2020-12-17 20:24:33,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:33,316 INFO L481 AbstractCegarLoop]: Abstraction has 165858 states and 484114 transitions. [2020-12-17 20:24:33,316 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) [2020-12-17 20:24:33,316 INFO L276 IsEmpty]: Start isEmpty. Operand 165858 states and 484114 transitions. [2020-12-17 20:24:33,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-17 20:24:33,380 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:33,380 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] [2020-12-17 20:24:33,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-17 20:24:33,587 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:33,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:33,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1610795128, now seen corresponding path program 8 times [2020-12-17 20:24:33,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:33,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742162132] [2020-12-17 20:24:33,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:33,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742162132] [2020-12-17 20:24:33,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033336146] [2020-12-17 20:24:33,734 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:33,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:24:33,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:24:33,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:24:33,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:33,999 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:34,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:34,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:34,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-17 20:24:34,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113132170] [2020-12-17 20:24:34,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:24:34,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:34,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:24:34,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:24:34,039 INFO L87 Difference]: Start difference. First operand 165858 states and 484114 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) [2020-12-17 20:24:35,011 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-17 20:24:36,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:36,032 INFO L93 Difference]: Finished difference Result 167522 states and 488978 transitions. [2020-12-17 20:24:36,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-17 20:24:36,033 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 [2020-12-17 20:24:36,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:36,034 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=566, Invalid=1690, Unknown=0, NotChecked=0, Total=2256 [2020-12-17 20:24:36,034 INFO L78 Accepts]: Start accepts. Automaton has 167522 states and 488978 transitions. Word has length 53 [2020-12-17 20:24:36,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:36,034 INFO L481 AbstractCegarLoop]: Abstraction has 167522 states and 488978 transitions. [2020-12-17 20:24:36,035 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) [2020-12-17 20:24:36,035 INFO L276 IsEmpty]: Start isEmpty. Operand 167522 states and 488978 transitions. [2020-12-17 20:24:36,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-17 20:24:36,095 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:36,095 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] [2020-12-17 20:24:36,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-17 20:24:36,296 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:36,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:36,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1985432118, now seen corresponding path program 9 times [2020-12-17 20:24:36,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:36,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668985389] [2020-12-17 20:24:36,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:36,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668985389] [2020-12-17 20:24:36,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222568671] [2020-12-17 20:24:36,459 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:37,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-17 20:24:37,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:24:37,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:24:37,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:37,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:37,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:37,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-17 20:24:37,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823230717] [2020-12-17 20:24:37,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:24:37,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:37,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:24:37,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:24:37,319 INFO L87 Difference]: Start difference. First operand 167522 states and 488978 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) [2020-12-17 20:24:39,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:39,892 INFO L93 Difference]: Finished difference Result 170210 states and 496850 transitions. [2020-12-17 20:24:39,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-17 20:24:39,893 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 [2020-12-17 20:24:39,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:39,897 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=651, Invalid=1899, Unknown=0, NotChecked=0, Total=2550 [2020-12-17 20:24:39,897 INFO L78 Accepts]: Start accepts. Automaton has 170210 states and 496850 transitions. Word has length 53 [2020-12-17 20:24:39,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:39,897 INFO L481 AbstractCegarLoop]: Abstraction has 170210 states and 496850 transitions. [2020-12-17 20:24:39,897 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) [2020-12-17 20:24:39,897 INFO L276 IsEmpty]: Start isEmpty. Operand 170210 states and 496850 transitions. [2020-12-17 20:24:39,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-17 20:24:39,975 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:39,975 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] [2020-12-17 20:24:40,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-17 20:24:40,191 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:40,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:40,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1474228438, now seen corresponding path program 10 times [2020-12-17 20:24:40,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:40,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17650885] [2020-12-17 20:24:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:40,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17650885] [2020-12-17 20:24:40,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963621661] [2020-12-17 20:24:40,370 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:40,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:24:40,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:24:40,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:24:40,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:40,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:40,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:40,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:40,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:40,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-17 20:24:40,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948741547] [2020-12-17 20:24:40,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:24:40,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:40,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:24:40,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:24:40,738 INFO L87 Difference]: Start difference. First operand 170210 states and 496850 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) [2020-12-17 20:24:42,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:42,878 INFO L93 Difference]: Finished difference Result 171170 states and 499666 transitions. [2020-12-17 20:24:42,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-17 20:24:42,878 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 [2020-12-17 20:24:42,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:42,879 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=528, Invalid=1634, Unknown=0, NotChecked=0, Total=2162 [2020-12-17 20:24:42,879 INFO L78 Accepts]: Start accepts. Automaton has 171170 states and 499666 transitions. Word has length 53 [2020-12-17 20:24:42,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:42,879 INFO L481 AbstractCegarLoop]: Abstraction has 171170 states and 499666 transitions. [2020-12-17 20:24:42,880 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) [2020-12-17 20:24:42,880 INFO L276 IsEmpty]: Start isEmpty. Operand 171170 states and 499666 transitions. [2020-12-17 20:24:42,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-17 20:24:42,938 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:42,939 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] [2020-12-17 20:24:43,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-17 20:24:43,146 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:43,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:43,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1882091344, now seen corresponding path program 11 times [2020-12-17 20:24:43,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:43,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365082748] [2020-12-17 20:24:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:43,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365082748] [2020-12-17 20:24:43,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220940751] [2020-12-17 20:24:43,345 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:43,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-17 20:24:43,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:24:43,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:24:43,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:43,612 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:43,617 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:43,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:43,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:43,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-17 20:24:43,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550361690] [2020-12-17 20:24:43,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:24:43,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:43,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:24:43,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:24:43,689 INFO L87 Difference]: Start difference. First operand 171170 states and 499666 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) [2020-12-17 20:24:45,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:45,577 INFO L93 Difference]: Finished difference Result 174370 states and 509010 transitions. [2020-12-17 20:24:45,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-17 20:24:45,578 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 [2020-12-17 20:24:45,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:45,579 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=503, Invalid=1389, Unknown=0, NotChecked=0, Total=1892 [2020-12-17 20:24:45,579 INFO L78 Accepts]: Start accepts. Automaton has 174370 states and 509010 transitions. Word has length 53 [2020-12-17 20:24:45,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:45,579 INFO L481 AbstractCegarLoop]: Abstraction has 174370 states and 509010 transitions. [2020-12-17 20:24:45,579 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) [2020-12-17 20:24:45,579 INFO L276 IsEmpty]: Start isEmpty. Operand 174370 states and 509010 transitions. [2020-12-17 20:24:45,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-17 20:24:45,646 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:45,646 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] [2020-12-17 20:24:45,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-17 20:24:45,847 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:45,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:45,848 INFO L82 PathProgramCache]: Analyzing trace with hash 271823718, now seen corresponding path program 12 times [2020-12-17 20:24:45,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:45,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712364108] [2020-12-17 20:24:45,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:45,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712364108] [2020-12-17 20:24:45,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314641111] [2020-12-17 20:24:45,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:46,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-17 20:24:46,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:24:46,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:24:46,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:46,251 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:46,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:46,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-17 20:24:46,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708899680] [2020-12-17 20:24:46,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:24:46,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:46,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:24:46,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:24:46,262 INFO L87 Difference]: Start difference. First operand 174370 states and 509010 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) [2020-12-17 20:24:48,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:48,554 INFO L93 Difference]: Finished difference Result 177378 states and 517842 transitions. [2020-12-17 20:24:48,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-17 20:24:48,554 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 [2020-12-17 20:24:48,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:48,556 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=663, Invalid=1887, Unknown=0, NotChecked=0, Total=2550 [2020-12-17 20:24:48,556 INFO L78 Accepts]: Start accepts. Automaton has 177378 states and 517842 transitions. Word has length 53 [2020-12-17 20:24:48,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:48,556 INFO L481 AbstractCegarLoop]: Abstraction has 177378 states and 517842 transitions. [2020-12-17 20:24:48,556 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) [2020-12-17 20:24:48,557 INFO L276 IsEmpty]: Start isEmpty. Operand 177378 states and 517842 transitions. [2020-12-17 20:24:48,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-17 20:24:48,646 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:48,646 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] [2020-12-17 20:24:48,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:48,847 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:48,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:48,847 INFO L82 PathProgramCache]: Analyzing trace with hash -126292160, now seen corresponding path program 13 times [2020-12-17 20:24:48,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:48,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568505000] [2020-12-17 20:24:48,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:49,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568505000] [2020-12-17 20:24:49,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515970065] [2020-12-17 20:24:49,014 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:49,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:24:49,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:49,308 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:49,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:49,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-17 20:24:49,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586596798] [2020-12-17 20:24:49,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:24:49,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:49,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:24:49,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:24:49,364 INFO L87 Difference]: Start difference. First operand 177378 states and 517842 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) [2020-12-17 20:24:51,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:51,580 INFO L93 Difference]: Finished difference Result 180386 states and 526610 transitions. [2020-12-17 20:24:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-17 20:24:51,581 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 [2020-12-17 20:24:51,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:51,582 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=541, Invalid=1621, Unknown=0, NotChecked=0, Total=2162 [2020-12-17 20:24:51,582 INFO L78 Accepts]: Start accepts. Automaton has 180386 states and 526610 transitions. Word has length 53 [2020-12-17 20:24:51,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:51,582 INFO L481 AbstractCegarLoop]: Abstraction has 180386 states and 526610 transitions. [2020-12-17 20:24:51,582 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) [2020-12-17 20:24:51,582 INFO L276 IsEmpty]: Start isEmpty. Operand 180386 states and 526610 transitions. [2020-12-17 20:24:51,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-17 20:24:51,652 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:51,652 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] [2020-12-17 20:24:51,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:51,867 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:51,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:51,867 INFO L82 PathProgramCache]: Analyzing trace with hash 416206614, now seen corresponding path program 14 times [2020-12-17 20:24:51,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:51,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655537202] [2020-12-17 20:24:51,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:52,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:52,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655537202] [2020-12-17 20:24:52,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001624870] [2020-12-17 20:24:52,015 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:52,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:24:52,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:24:52,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:24:52,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:52,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:52,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:52,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:52,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:52,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-17 20:24:52,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022863354] [2020-12-17 20:24:52,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:24:52,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:52,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:24:52,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:24:52,349 INFO L87 Difference]: Start difference. First operand 180386 states and 526610 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) [2020-12-17 20:24:54,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:54,428 INFO L93 Difference]: Finished difference Result 191650 states and 559378 transitions. [2020-12-17 20:24:54,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-17 20:24:54,429 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 [2020-12-17 20:24:54,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:54,430 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=521, Invalid=1459, Unknown=0, NotChecked=0, Total=1980 [2020-12-17 20:24:54,430 INFO L78 Accepts]: Start accepts. Automaton has 191650 states and 559378 transitions. Word has length 53 [2020-12-17 20:24:54,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:54,430 INFO L481 AbstractCegarLoop]: Abstraction has 191650 states and 559378 transitions. [2020-12-17 20:24:54,430 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) [2020-12-17 20:24:54,430 INFO L276 IsEmpty]: Start isEmpty. Operand 191650 states and 559378 transitions. [2020-12-17 20:24:54,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-17 20:24:54,496 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:54,496 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] [2020-12-17 20:24:54,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:54,703 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:54,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:54,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1296111798, now seen corresponding path program 15 times [2020-12-17 20:24:54,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:54,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048415234] [2020-12-17 20:24:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:54,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048415234] [2020-12-17 20:24:54,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709905333] [2020-12-17 20:24:54,866 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:54,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-17 20:24:54,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:24:54,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:24:54,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:55,109 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:24:55,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:55,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:55,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-17 20:24:55,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657239323] [2020-12-17 20:24:55,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:24:55,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:55,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:24:55,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:24:55,304 INFO L87 Difference]: Start difference. First operand 191650 states and 559378 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) [2020-12-17 20:24:56,060 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 12 [2020-12-17 20:24:58,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:24:58,961 INFO L93 Difference]: Finished difference Result 217714 states and 635482 transitions. [2020-12-17 20:24:58,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-17 20:24:58,962 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 [2020-12-17 20:24:58,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:24:58,964 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=730, Invalid=2240, Unknown=0, NotChecked=0, Total=2970 [2020-12-17 20:24:58,964 INFO L78 Accepts]: Start accepts. Automaton has 217714 states and 635482 transitions. Word has length 53 [2020-12-17 20:24:58,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:24:58,964 INFO L481 AbstractCegarLoop]: Abstraction has 217714 states and 635482 transitions. [2020-12-17 20:24:58,965 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) [2020-12-17 20:24:58,965 INFO L276 IsEmpty]: Start isEmpty. Operand 217714 states and 635482 transitions. [2020-12-17 20:24:59,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-17 20:24:59,074 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:24:59,075 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] [2020-12-17 20:24:59,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-17 20:24:59,289 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:24:59,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:24:59,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1088090960, now seen corresponding path program 16 times [2020-12-17 20:24:59,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:24:59,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971001517] [2020-12-17 20:24:59,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:24:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:24:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:59,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971001517] [2020-12-17 20:24:59,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432674311] [2020-12-17 20:24:59,458 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:24:59,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:24:59,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:24:59,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:24:59,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:24:59,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:24:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:24:59,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:24:59,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-17 20:24:59,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388527950] [2020-12-17 20:24:59,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:24:59,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:24:59,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:24:59,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:24:59,797 INFO L87 Difference]: Start difference. First operand 217714 states and 635482 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) [2020-12-17 20:25:02,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:25:02,786 INFO L93 Difference]: Finished difference Result 232114 states and 677530 transitions. [2020-12-17 20:25:02,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-17 20:25:02,786 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 [2020-12-17 20:25:02,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:25:02,788 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=707, Invalid=2263, Unknown=0, NotChecked=0, Total=2970 [2020-12-17 20:25:02,788 INFO L78 Accepts]: Start accepts. Automaton has 232114 states and 677530 transitions. Word has length 53 [2020-12-17 20:25:02,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:25:02,788 INFO L481 AbstractCegarLoop]: Abstraction has 232114 states and 677530 transitions. [2020-12-17 20:25:02,789 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) [2020-12-17 20:25:02,789 INFO L276 IsEmpty]: Start isEmpty. Operand 232114 states and 677530 transitions. [2020-12-17 20:25:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-17 20:25:02,854 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:25:02,854 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] [2020-12-17 20:25:03,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:25:03,055 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:25:03,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:25:03,055 INFO L82 PathProgramCache]: Analyzing trace with hash 325199348, now seen corresponding path program 17 times [2020-12-17 20:25:03,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:25:03,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077523723] [2020-12-17 20:25:03,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:25:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:25:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:03,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077523723] [2020-12-17 20:25:03,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794273069] [2020-12-17 20:25:03,220 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:25:03,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-17 20:25:03,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:25:03,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:25:03,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:25:03,452 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:25:03,481 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:25:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:03,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:25:03,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-17 20:25:03,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586071434] [2020-12-17 20:25:03,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:25:03,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:25:03,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:25:03,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:25:03,498 INFO L87 Difference]: Start difference. First operand 232114 states and 677530 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) [2020-12-17 20:25:07,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:25:07,321 INFO L93 Difference]: Finished difference Result 269362 states and 786394 transitions. [2020-12-17 20:25:07,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-17 20:25:07,322 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 [2020-12-17 20:25:07,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:25:07,324 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1271, Invalid=4131, Unknown=0, NotChecked=0, Total=5402 [2020-12-17 20:25:07,324 INFO L78 Accepts]: Start accepts. Automaton has 269362 states and 786394 transitions. Word has length 53 [2020-12-17 20:25:07,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:25:07,324 INFO L481 AbstractCegarLoop]: Abstraction has 269362 states and 786394 transitions. [2020-12-17 20:25:07,324 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) [2020-12-17 20:25:07,324 INFO L276 IsEmpty]: Start isEmpty. Operand 269362 states and 786394 transitions. [2020-12-17 20:25:07,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-17 20:25:07,397 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:25:07,397 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] [2020-12-17 20:25:07,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-17 20:25:07,598 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:25:07,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:25:07,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1407530148, now seen corresponding path program 18 times [2020-12-17 20:25:07,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:25:07,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69521063] [2020-12-17 20:25:07,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:25:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:25:08,435 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-12-17 20:25:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:08,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69521063] [2020-12-17 20:25:08,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948841821] [2020-12-17 20:25:08,544 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:25:08,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-17 20:25:08,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:25:08,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-17 20:25:08,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:25:08,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:25:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:08,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:25:08,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-12-17 20:25:08,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039314748] [2020-12-17 20:25:08,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-17 20:25:08,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:25:08,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-17 20:25:08,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-12-17 20:25:08,777 INFO L87 Difference]: Start difference. First operand 269362 states and 786394 transitions. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:25:11,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:25:11,839 INFO L93 Difference]: Finished difference Result 272530 states and 795666 transitions. [2020-12-17 20:25:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-17 20:25:11,840 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have 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 [2020-12-17 20:25:11,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:25:11,841 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=623, Invalid=2347, Unknown=0, NotChecked=0, Total=2970 [2020-12-17 20:25:11,841 INFO L78 Accepts]: Start accepts. Automaton has 272530 states and 795666 transitions. Word has length 53 [2020-12-17 20:25:11,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:25:11,841 INFO L481 AbstractCegarLoop]: Abstraction has 272530 states and 795666 transitions. [2020-12-17 20:25:11,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-12-17 20:25:11,842 INFO L276 IsEmpty]: Start isEmpty. Operand 272530 states and 795666 transitions. [2020-12-17 20:25:11,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-17 20:25:11,938 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:25:11,939 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] [2020-12-17 20:25:12,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:25:12,140 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:25:12,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:25:12,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1474146840, now seen corresponding path program 19 times [2020-12-17 20:25:12,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:25:12,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838649084] [2020-12-17 20:25:12,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:25:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:25:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:12,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838649084] [2020-12-17 20:25:12,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291046890] [2020-12-17 20:25:12,325 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:25:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:25:12,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:25:12,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:25:12,583 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:25:12,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:25:12,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:12,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:25:12,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-17 20:25:12,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726771205] [2020-12-17 20:25:12,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:25:12,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:25:12,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:25:12,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:25:12,681 INFO L87 Difference]: Start difference. First operand 272530 states and 795666 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) [2020-12-17 20:25:16,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:25:16,984 INFO L93 Difference]: Finished difference Result 302970 states and 884418 transitions. [2020-12-17 20:25:16,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-17 20:25:16,985 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 [2020-12-17 20:25:16,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:25:16,986 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1379, Invalid=4627, Unknown=0, NotChecked=0, Total=6006 [2020-12-17 20:25:16,986 INFO L78 Accepts]: Start accepts. Automaton has 302970 states and 884418 transitions. Word has length 53 [2020-12-17 20:25:16,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:25:16,986 INFO L481 AbstractCegarLoop]: Abstraction has 302970 states and 884418 transitions. [2020-12-17 20:25:16,986 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) [2020-12-17 20:25:16,986 INFO L276 IsEmpty]: Start isEmpty. Operand 302970 states and 884418 transitions. [2020-12-17 20:25:17,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-17 20:25:17,847 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:25:17,847 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] [2020-12-17 20:25:18,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-17 20:25:18,048 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:25:18,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:25:18,048 INFO L82 PathProgramCache]: Analyzing trace with hash 973842700, now seen corresponding path program 20 times [2020-12-17 20:25:18,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:25:18,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268103770] [2020-12-17 20:25:18,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:25:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:25:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:18,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268103770] [2020-12-17 20:25:18,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054678453] [2020-12-17 20:25:18,236 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:25:18,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:25:18,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:25:18,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:25:18,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:25:18,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:25:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:18,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:25:18,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-17 20:25:18,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670310297] [2020-12-17 20:25:18,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:25:18,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:25:18,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:25:18,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:25:18,560 INFO L87 Difference]: Start difference. First operand 302970 states and 884418 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) [2020-12-17 20:25:22,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:25:22,172 INFO L93 Difference]: Finished difference Result 316538 states and 923906 transitions. [2020-12-17 20:25:22,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-17 20:25:22,173 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 [2020-12-17 20:25:22,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:25:22,173 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1007, Invalid=3415, Unknown=0, NotChecked=0, Total=4422 [2020-12-17 20:25:22,173 INFO L78 Accepts]: Start accepts. Automaton has 316538 states and 923906 transitions. Word has length 53 [2020-12-17 20:25:22,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:25:22,174 INFO L481 AbstractCegarLoop]: Abstraction has 316538 states and 923906 transitions. [2020-12-17 20:25:22,174 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) [2020-12-17 20:25:22,174 INFO L276 IsEmpty]: Start isEmpty. Operand 316538 states and 923906 transitions. [2020-12-17 20:25:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-17 20:25:22,234 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:25:22,234 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] [2020-12-17 20:25:22,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:25:22,435 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:25:22,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:25:22,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1593635218, now seen corresponding path program 21 times [2020-12-17 20:25:22,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:25:22,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526696042] [2020-12-17 20:25:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:25:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:25:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:22,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526696042] [2020-12-17 20:25:22,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319977906] [2020-12-17 20:25:22,606 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:25:22,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-17 20:25:22,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:25:22,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-17 20:25:22,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:25:22,890 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:25:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:22,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:25:22,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-17 20:25:22,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896837217] [2020-12-17 20:25:22,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:25:22,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:25:22,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:25:22,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:25:22,927 INFO L87 Difference]: Start difference. First operand 316538 states and 923906 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) [2020-12-17 20:25:27,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:25:27,668 INFO L93 Difference]: Finished difference Result 320122 states and 934402 transitions. [2020-12-17 20:25:27,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-17 20:25:27,669 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 [2020-12-17 20:25:27,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:25:27,670 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=999, Invalid=3291, Unknown=0, NotChecked=0, Total=4290 [2020-12-17 20:25:27,670 INFO L78 Accepts]: Start accepts. Automaton has 320122 states and 934402 transitions. Word has length 53 [2020-12-17 20:25:27,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:25:27,670 INFO L481 AbstractCegarLoop]: Abstraction has 320122 states and 934402 transitions. [2020-12-17 20:25:27,670 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) [2020-12-17 20:25:27,670 INFO L276 IsEmpty]: Start isEmpty. Operand 320122 states and 934402 transitions. [2020-12-17 20:25:27,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-17 20:25:27,759 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:25:27,759 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] [2020-12-17 20:25:27,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-17 20:25:27,973 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:25:27,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:25:27,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1288041770, now seen corresponding path program 22 times [2020-12-17 20:25:27,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:25:27,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483811063] [2020-12-17 20:25:27,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:25:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:25:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:28,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483811063] [2020-12-17 20:25:28,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17487358] [2020-12-17 20:25:28,148 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:25:28,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:25:28,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:25:28,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-17 20:25:28,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:25:28,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-17 20:25:28,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:25:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:28,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:25:28,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-17 20:25:28,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210096606] [2020-12-17 20:25:28,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-17 20:25:28,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:25:28,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-17 20:25:28,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-12-17 20:25:28,544 INFO L87 Difference]: Start difference. First operand 320122 states and 934402 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) [2020-12-17 20:25:34,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:25:34,512 INFO L93 Difference]: Finished difference Result 371514 states and 1084994 transitions. [2020-12-17 20:25:34,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-17 20:25:34,513 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 [2020-12-17 20:25:34,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:25:34,514 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2576 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1614, Invalid=5192, Unknown=0, NotChecked=0, Total=6806 [2020-12-17 20:25:34,514 INFO L78 Accepts]: Start accepts. Automaton has 371514 states and 1084994 transitions. Word has length 53 [2020-12-17 20:25:34,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:25:34,515 INFO L481 AbstractCegarLoop]: Abstraction has 371514 states and 1084994 transitions. [2020-12-17 20:25:34,515 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) [2020-12-17 20:25:34,515 INFO L276 IsEmpty]: Start isEmpty. Operand 371514 states and 1084994 transitions. [2020-12-17 20:25:34,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-17 20:25:34,709 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:25:34,709 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] [2020-12-17 20:25:34,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-17 20:25:34,923 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:25:34,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:25:34,923 INFO L82 PathProgramCache]: Analyzing trace with hash 948308753, now seen corresponding path program 23 times [2020-12-17 20:25:34,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:25:34,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506977648] [2020-12-17 20:25:34,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:25:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:25:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:35,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506977648] [2020-12-17 20:25:35,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343294223] [2020-12-17 20:25:35,149 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:25:35,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-17 20:25:35,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:25:35,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:25:35,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:25:35,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:25:35,474 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:25:35,476 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:25:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:35,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:25:35,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-17 20:25:35,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854403148] [2020-12-17 20:25:35,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-17 20:25:35,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:25:35,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-17 20:25:35,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2020-12-17 20:25:35,544 INFO L87 Difference]: Start difference. First operand 371514 states and 1084994 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) [2020-12-17 20:25:38,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:25:38,462 INFO L93 Difference]: Finished difference Result 372474 states and 1087810 transitions. [2020-12-17 20:25:38,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-17 20:25:38,463 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 [2020-12-17 20:25:38,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:25:38,463 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=514, Invalid=1378, Unknown=0, NotChecked=0, Total=1892 [2020-12-17 20:25:38,463 INFO L78 Accepts]: Start accepts. Automaton has 372474 states and 1087810 transitions. Word has length 58 [2020-12-17 20:25:38,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:25:38,463 INFO L481 AbstractCegarLoop]: Abstraction has 372474 states and 1087810 transitions. [2020-12-17 20:25:38,464 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) [2020-12-17 20:25:38,464 INFO L276 IsEmpty]: Start isEmpty. Operand 372474 states and 1087810 transitions. [2020-12-17 20:25:38,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-17 20:25:38,602 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:25:38,602 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] [2020-12-17 20:25:38,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-17 20:25:38,816 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:25:38,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:25:38,816 INFO L82 PathProgramCache]: Analyzing trace with hash -661958873, now seen corresponding path program 24 times [2020-12-17 20:25:38,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:25:38,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168591079] [2020-12-17 20:25:38,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:25:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:25:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:39,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168591079] [2020-12-17 20:25:39,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499475260] [2020-12-17 20:25:39,025 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:25:39,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-17 20:25:39,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:25:39,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:25:39,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:25:39,431 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:25:39,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:25:39,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:25:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:39,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:25:39,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-17 20:25:39,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753984847] [2020-12-17 20:25:39,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-17 20:25:39,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:25:39,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-17 20:25:39,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-12-17 20:25:39,495 INFO L87 Difference]: Start difference. First operand 372474 states and 1087810 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) [2020-12-17 20:25:43,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:25:43,474 INFO L93 Difference]: Finished difference Result 377274 states and 1101890 transitions. [2020-12-17 20:25:43,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-17 20:25:43,475 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 [2020-12-17 20:25:43,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:25:43,475 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=618, Invalid=1734, Unknown=0, NotChecked=0, Total=2352 [2020-12-17 20:25:43,475 INFO L78 Accepts]: Start accepts. Automaton has 377274 states and 1101890 transitions. Word has length 58 [2020-12-17 20:25:43,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:25:43,475 INFO L481 AbstractCegarLoop]: Abstraction has 377274 states and 1101890 transitions. [2020-12-17 20:25:43,475 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) [2020-12-17 20:25:43,475 INFO L276 IsEmpty]: Start isEmpty. Operand 377274 states and 1101890 transitions. [2020-12-17 20:25:43,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-17 20:25:43,652 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:25:43,652 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:25:43,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-17 20:25:43,853 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:25:43,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:25:43,854 INFO L82 PathProgramCache]: Analyzing trace with hash 804018355, now seen corresponding path program 25 times [2020-12-17 20:25:43,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:25:43,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131626399] [2020-12-17 20:25:43,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:25:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:25:44,098 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:44,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131626399] [2020-12-17 20:25:44,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986179513] [2020-12-17 20:25:44,099 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:25:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:25:44,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:25:44,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:25:44,427 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:25:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:44,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:25:44,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-17 20:25:44,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136211785] [2020-12-17 20:25:44,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-17 20:25:44,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:25:44,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-17 20:25:44,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-12-17 20:25:44,465 INFO L87 Difference]: Start difference. First operand 377274 states and 1101890 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) [2020-12-17 20:25:47,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:25:47,779 INFO L93 Difference]: Finished difference Result 381370 states and 1113858 transitions. [2020-12-17 20:25:47,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-17 20:25:47,780 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 [2020-12-17 20:25:47,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:25:47,781 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=721, Invalid=2141, Unknown=0, NotChecked=0, Total=2862 [2020-12-17 20:25:47,781 INFO L78 Accepts]: Start accepts. Automaton has 381370 states and 1113858 transitions. Word has length 58 [2020-12-17 20:25:47,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:25:47,781 INFO L481 AbstractCegarLoop]: Abstraction has 381370 states and 1113858 transitions. [2020-12-17 20:25:47,781 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) [2020-12-17 20:25:47,781 INFO L276 IsEmpty]: Start isEmpty. Operand 381370 states and 1113858 transitions. [2020-12-17 20:25:48,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-17 20:25:48,886 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:25:48,886 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] [2020-12-17 20:25:49,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:25:49,105 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:25:49,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:25:49,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1502758405, now seen corresponding path program 26 times [2020-12-17 20:25:49,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:25:49,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075481717] [2020-12-17 20:25:49,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:25:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:25:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:49,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075481717] [2020-12-17 20:25:49,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620525665] [2020-12-17 20:25:49,349 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:25:49,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:25:49,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:25:49,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:25:49,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:25:49,691 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:25:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:49,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:25:49,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-17 20:25:49,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409202743] [2020-12-17 20:25:49,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-17 20:25:49,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:25:49,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-17 20:25:49,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2020-12-17 20:25:49,736 INFO L87 Difference]: Start difference. First operand 381370 states and 1113858 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) [2020-12-17 20:25:53,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:25:53,345 INFO L93 Difference]: Finished difference Result 387066 states and 1130626 transitions. [2020-12-17 20:25:53,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-17 20:25:53,346 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 [2020-12-17 20:25:53,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:25:53,346 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=815, Invalid=2377, Unknown=0, NotChecked=0, Total=3192 [2020-12-17 20:25:53,346 INFO L78 Accepts]: Start accepts. Automaton has 387066 states and 1130626 transitions. Word has length 58 [2020-12-17 20:25:53,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:25:53,347 INFO L481 AbstractCegarLoop]: Abstraction has 387066 states and 1130626 transitions. [2020-12-17 20:25:53,347 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) [2020-12-17 20:25:53,347 INFO L276 IsEmpty]: Start isEmpty. Operand 387066 states and 1130626 transitions. [2020-12-17 20:25:53,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-17 20:25:53,483 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:25:53,483 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] [2020-12-17 20:25:53,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-17 20:25:53,697 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:25:53,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:25:53,697 INFO L82 PathProgramCache]: Analyzing trace with hash 667451665, now seen corresponding path program 27 times [2020-12-17 20:25:53,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:25:53,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568725769] [2020-12-17 20:25:53,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:25:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:25:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:53,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568725769] [2020-12-17 20:25:53,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286953870] [2020-12-17 20:25:53,915 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:25:53,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-17 20:25:53,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:25:53,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:25:54,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:25:54,284 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:25:54,288 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:25:54,290 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:25:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:25:54,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:25:54,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-17 20:25:54,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274685238] [2020-12-17 20:25:54,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-17 20:25:54,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:25:54,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-17 20:25:54,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-12-17 20:25:54,352 INFO L87 Difference]: Start difference. First operand 387066 states and 1130626 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) [2020-12-17 20:25:55,376 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-12-17 20:25:58,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:25:58,747 INFO L93 Difference]: Finished difference Result 390906 states and 1141890 transitions. [2020-12-17 20:25:58,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-17 20:25:58,748 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 [2020-12-17 20:25:58,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:25:58,749 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=824, Invalid=2598, Unknown=0, NotChecked=0, Total=3422 [2020-12-17 20:25:58,749 INFO L78 Accepts]: Start accepts. Automaton has 390906 states and 1141890 transitions. Word has length 58 [2020-12-17 20:25:58,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:25:58,749 INFO L481 AbstractCegarLoop]: Abstraction has 390906 states and 1141890 transitions. [2020-12-17 20:25:58,749 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) [2020-12-17 20:25:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand 390906 states and 1141890 transitions. [2020-12-17 20:25:59,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-17 20:25:59,845 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:25:59,845 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] [2020-12-17 20:26:00,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-17 20:26:00,060 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:26:00,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:26:00,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1750112601, now seen corresponding path program 28 times [2020-12-17 20:26:00,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:26:00,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202402779] [2020-12-17 20:26:00,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:26:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:26:00,482 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2020-12-17 20:26:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:26:00,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202402779] [2020-12-17 20:26:00,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848777048] [2020-12-17 20:26:00,757 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:26:00,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:26:00,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:26:00,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:26:00,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:26:01,104 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:26:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:26:01,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:26:01,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-17 20:26:01,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920031552] [2020-12-17 20:26:01,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-17 20:26:01,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:26:01,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-17 20:26:01,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2020-12-17 20:26:01,150 INFO L87 Difference]: Start difference. First operand 390906 states and 1141890 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) [2020-12-17 20:26:05,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:26:05,303 INFO L93 Difference]: Finished difference Result 395386 states and 1154946 transitions. [2020-12-17 20:26:05,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-17 20:26:05,304 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 [2020-12-17 20:26:05,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:26:05,313 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=820, Invalid=2486, Unknown=0, NotChecked=0, Total=3306 [2020-12-17 20:26:05,313 INFO L78 Accepts]: Start accepts. Automaton has 395386 states and 1154946 transitions. Word has length 58 [2020-12-17 20:26:05,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:26:05,316 INFO L481 AbstractCegarLoop]: Abstraction has 395386 states and 1154946 transitions. [2020-12-17 20:26:05,316 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) [2020-12-17 20:26:05,316 INFO L276 IsEmpty]: Start isEmpty. Operand 395386 states and 1154946 transitions. [2020-12-17 20:26:05,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-17 20:26:05,513 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:26:05,514 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:26:05,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:26:05,726 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:26:05,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:26:05,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1051372551, now seen corresponding path program 29 times [2020-12-17 20:26:05,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:26:05,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081479965] [2020-12-17 20:26:05,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:26:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:26:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:26:05,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081479965] [2020-12-17 20:26:05,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542858485] [2020-12-17 20:26:05,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:26:06,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-17 20:26:06,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:26:06,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:26:06,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:26:06,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:26:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:26:06,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:26:06,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-17 20:26:06,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990458892] [2020-12-17 20:26:06,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-17 20:26:06,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:26:06,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-17 20:26:06,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-12-17 20:26:06,453 INFO L87 Difference]: Start difference. First operand 395386 states and 1154946 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) [2020-12-17 20:26:12,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:26:12,022 INFO L93 Difference]: Finished difference Result 397434 states and 1160962 transitions. [2020-12-17 20:26:12,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-17 20:26:12,023 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 [2020-12-17 20:26:12,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:26:12,024 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1053, Invalid=3237, Unknown=0, NotChecked=0, Total=4290 [2020-12-17 20:26:12,024 INFO L78 Accepts]: Start accepts. Automaton has 397434 states and 1160962 transitions. Word has length 58 [2020-12-17 20:26:12,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:26:12,025 INFO L481 AbstractCegarLoop]: Abstraction has 397434 states and 1160962 transitions. [2020-12-17 20:26:12,025 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) [2020-12-17 20:26:12,025 INFO L276 IsEmpty]: Start isEmpty. Operand 397434 states and 1160962 transitions. [2020-12-17 20:26:12,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-17 20:26:12,335 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:26:12,335 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] [2020-12-17 20:26:12,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-17 20:26:12,548 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:26:12,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:26:12,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1946130335, now seen corresponding path program 11 times [2020-12-17 20:26:12,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:26:12,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840451121] [2020-12-17 20:26:12,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:26:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:26:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:26:12,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840451121] [2020-12-17 20:26:12,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358640990] [2020-12-17 20:26:12,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:26:12,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-17 20:26:12,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:26:12,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:26:12,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:26:13,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:26:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:26:13,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:26:13,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-17 20:26:13,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564238106] [2020-12-17 20:26:13,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-17 20:26:13,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:26:13,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-17 20:26:13,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-12-17 20:26:13,366 INFO L87 Difference]: Start difference. First operand 397434 states and 1160962 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) [2020-12-17 20:26:17,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:26:17,977 INFO L93 Difference]: Finished difference Result 401146 states and 1171906 transitions. [2020-12-17 20:26:17,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-17 20:26:17,978 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 [2020-12-17 20:26:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:26:17,979 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=896, Invalid=2644, Unknown=0, NotChecked=0, Total=3540 [2020-12-17 20:26:17,979 INFO L78 Accepts]: Start accepts. Automaton has 401146 states and 1171906 transitions. Word has length 58 [2020-12-17 20:26:17,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:26:17,980 INFO L481 AbstractCegarLoop]: Abstraction has 401146 states and 1171906 transitions. [2020-12-17 20:26:17,980 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) [2020-12-17 20:26:17,980 INFO L276 IsEmpty]: Start isEmpty. Operand 401146 states and 1171906 transitions. [2020-12-17 20:26:19,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-17 20:26:19,046 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:26:19,047 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:26:19,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:26:19,247 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:26:19,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:26:19,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2001000967, now seen corresponding path program 30 times [2020-12-17 20:26:19,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:26:19,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188092868] [2020-12-17 20:26:19,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:26:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:26:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:26:19,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188092868] [2020-12-17 20:26:19,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561838087] [2020-12-17 20:26:19,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:26:19,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-17 20:26:19,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:26:19,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:26:19,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:26:19,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:26:19,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:26:19,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:26:20,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:26:20,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:26:20,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-17 20:26:20,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482014879] [2020-12-17 20:26:20,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-17 20:26:20,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:26:20,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-17 20:26:20,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2020-12-17 20:26:20,022 INFO L87 Difference]: Start difference. First operand 401146 states and 1171906 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) [2020-12-17 20:26:24,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:26:24,316 INFO L93 Difference]: Finished difference Result 403194 states and 1177922 transitions. [2020-12-17 20:26:24,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-17 20:26:24,317 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 [2020-12-17 20:26:24,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:26:24,319 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=777, Invalid=2415, Unknown=0, NotChecked=0, Total=3192 [2020-12-17 20:26:24,320 INFO L78 Accepts]: Start accepts. Automaton has 403194 states and 1177922 transitions. Word has length 58 [2020-12-17 20:26:24,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:26:24,320 INFO L481 AbstractCegarLoop]: Abstraction has 403194 states and 1177922 transitions. [2020-12-17 20:26:24,320 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) [2020-12-17 20:26:24,320 INFO L276 IsEmpty]: Start isEmpty. Operand 403194 states and 1177922 transitions. [2020-12-17 20:26:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-17 20:26:24,550 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:26:24,550 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] [2020-12-17 20:26:24,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-17 20:26:24,764 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:26:24,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:26:24,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1916523223, now seen corresponding path program 31 times [2020-12-17 20:26:24,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:26:24,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351907621] [2020-12-17 20:26:24,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:26:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:26:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:26:25,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351907621] [2020-12-17 20:26:25,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962392557] [2020-12-17 20:26:25,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:26:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:26:25,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:26:25,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:26:25,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:26:25,379 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:26:25,381 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:26:25,440 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:26:25,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:26:25,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-17 20:26:25,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892691089] [2020-12-17 20:26:25,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-17 20:26:25,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:26:25,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-17 20:26:25,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-12-17 20:26:25,442 INFO L87 Difference]: Start difference. First operand 403194 states and 1177922 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) [2020-12-17 20:26:26,500 WARN L193 SmtUtils]: Spent 955.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 12 [2020-12-17 20:26:30,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:26:30,960 INFO L93 Difference]: Finished difference Result 404090 states and 1180546 transitions. [2020-12-17 20:26:30,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-17 20:26:30,961 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 [2020-12-17 20:26:30,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:26:30,969 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=633, Invalid=1719, Unknown=0, NotChecked=0, Total=2352 [2020-12-17 20:26:30,969 INFO L78 Accepts]: Start accepts. Automaton has 404090 states and 1180546 transitions. Word has length 58 [2020-12-17 20:26:30,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:26:30,970 INFO L481 AbstractCegarLoop]: Abstraction has 404090 states and 1180546 transitions. [2020-12-17 20:26:30,970 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) [2020-12-17 20:26:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 404090 states and 1180546 transitions. [2020-12-17 20:26:31,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-17 20:26:31,177 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:26:31,178 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] [2020-12-17 20:26:31,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-17 20:26:31,392 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:26:31,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:26:31,392 INFO L82 PathProgramCache]: Analyzing trace with hash 306255597, now seen corresponding path program 32 times [2020-12-17 20:26:31,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:26:31,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562510534] [2020-12-17 20:26:31,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:26:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:26:31,785 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2020-12-17 20:26:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:26:32,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562510534] [2020-12-17 20:26:32,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830524653] [2020-12-17 20:26:32,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:26:32,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-17 20:26:32,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:26:32,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:26:32,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:26:32,357 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:26:32,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:26:32,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:26:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:26:32,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:26:32,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-17 20:26:32,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398854277] [2020-12-17 20:26:32,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-17 20:26:32,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:26:32,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-17 20:26:32,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-12-17 20:26:32,418 INFO L87 Difference]: Start difference. First operand 404090 states and 1180546 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) [2020-12-17 20:26:37,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:26:37,020 INFO L93 Difference]: Finished difference Result 408570 states and 1193666 transitions. [2020-12-17 20:26:37,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-17 20:26:37,021 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 [2020-12-17 20:26:37,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:26:37,022 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2020-12-17 20:26:37,022 INFO L78 Accepts]: Start accepts. Automaton has 408570 states and 1193666 transitions. Word has length 58 [2020-12-17 20:26:37,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:26:37,022 INFO L481 AbstractCegarLoop]: Abstraction has 408570 states and 1193666 transitions. [2020-12-17 20:26:37,023 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) [2020-12-17 20:26:37,023 INFO L276 IsEmpty]: Start isEmpty. Operand 408570 states and 1193666 transitions. [2020-12-17 20:26:38,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-17 20:26:38,239 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:26:38,241 INFO L504 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-17 20:26:38,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-17 20:26:38,455 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:26:38,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:26:38,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1772232825, now seen corresponding path program 33 times [2020-12-17 20:26:38,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:26:38,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451625392] [2020-12-17 20:26:38,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:26:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:26:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:26:38,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451625392] [2020-12-17 20:26:38,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801433480] [2020-12-17 20:26:38,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:26:38,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-17 20:26:38,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:26:38,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:26:38,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:26:39,218 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:26:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:26:39,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:26:39,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-17 20:26:39,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354387730] [2020-12-17 20:26:39,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-17 20:26:39,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:26:39,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-17 20:26:39,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-12-17 20:26:39,272 INFO L87 Difference]: Start difference. First operand 408570 states and 1193666 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) [2020-12-17 20:26:44,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:26:44,293 INFO L93 Difference]: Finished difference Result 412474 states and 1205058 transitions. [2020-12-17 20:26:44,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-17 20:26:44,294 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 [2020-12-17 20:26:44,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:26:44,295 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1025, Invalid=3265, Unknown=0, NotChecked=0, Total=4290 [2020-12-17 20:26:44,295 INFO L78 Accepts]: Start accepts. Automaton has 412474 states and 1205058 transitions. Word has length 58 [2020-12-17 20:26:44,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:26:44,296 INFO L481 AbstractCegarLoop]: Abstraction has 412474 states and 1205058 transitions. [2020-12-17 20:26:44,296 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) [2020-12-17 20:26:44,296 INFO L276 IsEmpty]: Start isEmpty. Operand 412474 states and 1205058 transitions. [2020-12-17 20:26:44,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-17 20:26:44,639 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:26:44,639 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] [2020-12-17 20:26:44,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-17 20:26:44,853 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:26:44,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:26:44,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1823994421, now seen corresponding path program 34 times [2020-12-17 20:26:44,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:26:44,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051414078] [2020-12-17 20:26:44,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:26:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:26:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:26:45,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051414078] [2020-12-17 20:26:45,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978973531] [2020-12-17 20:26:45,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:26:45,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-17 20:26:45,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:26:45,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:26:45,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:26:45,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:26:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:26:45,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:26:45,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-17 20:26:45,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124298905] [2020-12-17 20:26:45,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-17 20:26:45,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:26:45,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-17 20:26:45,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-12-17 20:26:45,545 INFO L87 Difference]: Start difference. First operand 412474 states and 1205058 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) [2020-12-17 20:26:47,229 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-17 20:26:51,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:26:51,754 INFO L93 Difference]: Finished difference Result 417658 states and 1220290 transitions. [2020-12-17 20:26:51,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-17 20:26:51,755 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 [2020-12-17 20:26:51,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:26:51,756 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1172, Invalid=3520, Unknown=0, NotChecked=0, Total=4692 [2020-12-17 20:26:51,756 INFO L78 Accepts]: Start accepts. Automaton has 417658 states and 1220290 transitions. Word has length 58 [2020-12-17 20:26:51,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:26:51,757 INFO L481 AbstractCegarLoop]: Abstraction has 417658 states and 1220290 transitions. [2020-12-17 20:26:51,757 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) [2020-12-17 20:26:51,757 INFO L276 IsEmpty]: Start isEmpty. Operand 417658 states and 1220290 transitions. [2020-12-17 20:26:52,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-17 20:26:52,049 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:26:52,049 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] [2020-12-17 20:26:52,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:26:52,263 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:26:52,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:26:52,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1635666135, now seen corresponding path program 35 times [2020-12-17 20:26:52,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:26:52,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523522644] [2020-12-17 20:26:52,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:26:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:26:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:26:52,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523522644] [2020-12-17 20:26:52,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585583502] [2020-12-17 20:26:52,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:26:52,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-17 20:26:52,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:26:52,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:26:52,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:26:52,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:26:52,795 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:26:52,797 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:26:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:26:52,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:26:52,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-17 20:26:52,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939452155] [2020-12-17 20:26:52,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-17 20:26:52,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:26:52,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-17 20:26:52,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-12-17 20:26:52,863 INFO L87 Difference]: Start difference. First operand 417658 states and 1220290 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) [2020-12-17 20:26:58,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-17 20:26:58,590 INFO L93 Difference]: Finished difference Result 419642 states and 1226114 transitions. [2020-12-17 20:26:58,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-17 20:26:58,591 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 [2020-12-17 20:26:58,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-17 20:26:58,592 INFO L763 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=943, Invalid=3089, Unknown=0, NotChecked=0, Total=4032 [2020-12-17 20:26:58,592 INFO L78 Accepts]: Start accepts. Automaton has 419642 states and 1226114 transitions. Word has length 58 [2020-12-17 20:26:58,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-17 20:26:58,593 INFO L481 AbstractCegarLoop]: Abstraction has 419642 states and 1226114 transitions. [2020-12-17 20:26:58,593 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) [2020-12-17 20:26:58,593 INFO L276 IsEmpty]: Start isEmpty. Operand 419642 states and 1226114 transitions. [2020-12-17 20:26:59,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-17 20:26:59,213 INFO L496 BasicCegarLoop]: Found error trace [2020-12-17 20:26:59,213 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] [2020-12-17 20:26:59,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-17 20:26:59,433 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-17 20:26:59,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-17 20:26:59,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1679925551, now seen corresponding path program 36 times [2020-12-17 20:26:59,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-17 20:26:59,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013729556] [2020-12-17 20:26:59,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-17 20:26:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-17 20:26:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:26:59,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013729556] [2020-12-17 20:26:59,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822574286] [2020-12-17 20:26:59,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-17 20:26:59,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-17 20:26:59,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-17 20:26:59,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-17 20:26:59,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-17 20:27:00,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:27:00,029 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:27:00,051 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-17 20:27:00,177 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 1 [2020-12-17 20:27:00,598 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2020-12-17 20:27:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-17 20:27:00,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-17 20:27:00,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-17 20:27:00,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413927973] [2020-12-17 20:27:00,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-17 20:27:00,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-17 20:27:00,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-17 20:27:00,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2020-12-17 20:27:00,630 INFO L87 Difference]: Start difference. First operand 419642 states and 1226114 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)