/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 23:36:47,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 23:36:47,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 23:36:47,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 23:36:47,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 23:36:47,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 23:36:47,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 23:36:47,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 23:36:47,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 23:36:47,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 23:36:47,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 23:36:47,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 23:36:47,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 23:36:47,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 23:36:47,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 23:36:47,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 23:36:47,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 23:36:47,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 23:36:47,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 23:36:47,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 23:36:47,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 23:36:47,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 23:36:47,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 23:36:47,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 23:36:47,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-18 23:36:47,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-18 23:36:47,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-18 23:36:47,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-18 23:36:47,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-18 23:36:47,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-18 23:36:47,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 23:36:47,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 23:36:47,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 23:36:47,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 23:36:47,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 23:36:47,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 23:36:47,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 23:36:47,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 23:36:47,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 23:36:47,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 23:36:47,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 23:36:47,512 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2019-12-18 23:36:47,532 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 23:36:47,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 23:36:47,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 23:36:47,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 23:36:47,535 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 23:36:47,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 23:36:47,535 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 23:36:47,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 23:36:47,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 23:36:47,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 23:36:47,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 23:36:47,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 23:36:47,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 23:36:47,538 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 23:36:47,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 23:36:47,539 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 23:36:47,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 23:36:47,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 23:36:47,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 23:36:47,540 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 23:36:47,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 23:36:47,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 23:36:47,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 23:36:47,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 23:36:47,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 23:36:47,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 23:36:47,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 23:36:47,542 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2019-12-18 23:36:47,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 23:36:47,542 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 23:36:47,864 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 23:36:47,884 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 23:36:47,888 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 23:36:47,889 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 23:36:47,890 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 23:36:47,891 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2019-12-18 23:36:47,960 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9fe42375/02b2001410124aa7afaadde511261547/FLAG42558813a [2019-12-18 23:36:48,511 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 23:36:48,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2019-12-18 23:36:48,525 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9fe42375/02b2001410124aa7afaadde511261547/FLAG42558813a [2019-12-18 23:36:48,795 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9fe42375/02b2001410124aa7afaadde511261547 [2019-12-18 23:36:48,804 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 23:36:48,806 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 23:36:48,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 23:36:48,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 23:36:48,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 23:36:48,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:36:48" (1/1) ... [2019-12-18 23:36:48,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55a4b5e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:36:48, skipping insertion in model container [2019-12-18 23:36:48,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:36:48" (1/1) ... [2019-12-18 23:36:48,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 23:36:48,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 23:36:49,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 23:36:49,398 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 23:36:49,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 23:36:49,536 INFO L208 MainTranslator]: Completed translation [2019-12-18 23:36:49,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:36:49 WrapperNode [2019-12-18 23:36:49,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 23:36:49,539 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 23:36:49,539 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 23:36:49,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 23:36:49,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:36:49" (1/1) ... [2019-12-18 23:36:49,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:36:49" (1/1) ... [2019-12-18 23:36:49,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 23:36:49,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 23:36:49,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 23:36:49,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 23:36:49,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:36:49" (1/1) ... [2019-12-18 23:36:49,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:36:49" (1/1) ... [2019-12-18 23:36:49,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:36:49" (1/1) ... [2019-12-18 23:36:49,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:36:49" (1/1) ... [2019-12-18 23:36:49,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:36:49" (1/1) ... [2019-12-18 23:36:49,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:36:49" (1/1) ... [2019-12-18 23:36:49,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:36:49" (1/1) ... [2019-12-18 23:36:49,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 23:36:49,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 23:36:49,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 23:36:49,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 23:36:49,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:36:49" (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 [2019-12-18 23:36:49,709 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-18 23:36:49,710 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-18 23:36:49,710 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-18 23:36:49,710 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-18 23:36:49,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 23:36:49,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-18 23:36:49,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 23:36:49,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 23:36:49,712 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-18 23:36:49,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 23:36:49,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 23:36:49,715 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-18 23:36:50,061 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 23:36:50,061 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-18 23:36:50,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:36:50 BoogieIcfgContainer [2019-12-18 23:36:50,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 23:36:50,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 23:36:50,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 23:36:50,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 23:36:50,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 11:36:48" (1/3) ... [2019-12-18 23:36:50,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12520847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:36:50, skipping insertion in model container [2019-12-18 23:36:50,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:36:49" (2/3) ... [2019-12-18 23:36:50,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12520847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:36:50, skipping insertion in model container [2019-12-18 23:36:50,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:36:50" (3/3) ... [2019-12-18 23:36:50,070 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2019-12-18 23:36:50,079 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 23:36:50,080 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 23:36:50,086 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-18 23:36:50,087 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 23:36:50,112 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,112 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,112 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,113 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,113 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,114 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,114 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,114 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,114 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,115 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,115 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,115 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,116 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,116 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,116 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,117 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,117 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,117 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,118 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,118 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,119 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,119 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,119 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,120 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,120 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,120 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,121 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,122 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,128 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,128 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,129 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,129 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,129 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,129 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,146 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,146 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,147 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,147 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,148 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,148 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:36:50,164 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-18 23:36:50,188 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 23:36:50,188 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 23:36:50,188 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 23:36:50,188 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 23:36:50,189 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 23:36:50,189 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 23:36:50,189 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 23:36:50,189 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 23:36:50,198 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 53 places, 51 transitions [2019-12-18 23:36:50,270 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1013 states. [2019-12-18 23:36:50,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states. [2019-12-18 23:36:50,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-18 23:36:50,283 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:36:50,284 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:36:50,284 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:36:50,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:36:50,291 INFO L82 PathProgramCache]: Analyzing trace with hash -910010, now seen corresponding path program 1 times [2019-12-18 23:36:50,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:36:50,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863155183] [2019-12-18 23:36:50,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:36:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:36:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:50,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863155183] [2019-12-18 23:36:50,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:36:50,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-18 23:36:50,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793187306] [2019-12-18 23:36:50,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 23:36:50,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:36:50,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 23:36:50,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-18 23:36:50,716 INFO L87 Difference]: Start difference. First operand 1013 states. Second operand 5 states. [2019-12-18 23:36:50,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:36:50,920 INFO L93 Difference]: Finished difference Result 1778 states and 5126 transitions. [2019-12-18 23:36:50,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 23:36:50,922 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-12-18 23:36:50,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:36:50,946 INFO L225 Difference]: With dead ends: 1778 [2019-12-18 23:36:50,946 INFO L226 Difference]: Without dead ends: 500 [2019-12-18 23:36:50,948 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-12-18 23:36:50,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2019-12-18 23:36:51,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 388. [2019-12-18 23:36:51,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2019-12-18 23:36:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 993 transitions. [2019-12-18 23:36:51,044 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 993 transitions. Word has length 20 [2019-12-18 23:36:51,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:36:51,044 INFO L462 AbstractCegarLoop]: Abstraction has 388 states and 993 transitions. [2019-12-18 23:36:51,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 23:36:51,045 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 993 transitions. [2019-12-18 23:36:51,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-18 23:36:51,048 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:36:51,048 INFO L411 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] [2019-12-18 23:36:51,049 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:36:51,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:36:51,049 INFO L82 PathProgramCache]: Analyzing trace with hash 723642448, now seen corresponding path program 1 times [2019-12-18 23:36:51,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:36:51,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485811758] [2019-12-18 23:36:51,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:36:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:36:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:51,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485811758] [2019-12-18 23:36:51,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:36:51,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-18 23:36:51,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366069273] [2019-12-18 23:36:51,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 23:36:51,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:36:51,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 23:36:51,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-18 23:36:51,204 INFO L87 Difference]: Start difference. First operand 388 states and 993 transitions. Second operand 5 states. [2019-12-18 23:36:51,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:36:51,296 INFO L93 Difference]: Finished difference Result 465 states and 1147 transitions. [2019-12-18 23:36:51,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 23:36:51,297 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-12-18 23:36:51,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:36:51,302 INFO L225 Difference]: With dead ends: 465 [2019-12-18 23:36:51,302 INFO L226 Difference]: Without dead ends: 344 [2019-12-18 23:36:51,304 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-18 23:36:51,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2019-12-18 23:36:51,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 320. [2019-12-18 23:36:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-12-18 23:36:51,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 815 transitions. [2019-12-18 23:36:51,355 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 815 transitions. Word has length 23 [2019-12-18 23:36:51,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:36:51,355 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 815 transitions. [2019-12-18 23:36:51,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 23:36:51,355 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 815 transitions. [2019-12-18 23:36:51,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-18 23:36:51,357 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:36:51,357 INFO L411 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] [2019-12-18 23:36:51,357 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:36:51,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:36:51,360 INFO L82 PathProgramCache]: Analyzing trace with hash -660572760, now seen corresponding path program 1 times [2019-12-18 23:36:51,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:36:51,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577142290] [2019-12-18 23:36:51,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:36:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:36:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:51,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577142290] [2019-12-18 23:36:51,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:36:51,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-18 23:36:51,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469357595] [2019-12-18 23:36:51,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 23:36:51,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:36:51,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 23:36:51,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-18 23:36:51,541 INFO L87 Difference]: Start difference. First operand 320 states and 815 transitions. Second operand 5 states. [2019-12-18 23:36:51,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:36:51,624 INFO L93 Difference]: Finished difference Result 421 states and 1017 transitions. [2019-12-18 23:36:51,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 23:36:51,625 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-12-18 23:36:51,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:36:51,628 INFO L225 Difference]: With dead ends: 421 [2019-12-18 23:36:51,628 INFO L226 Difference]: Without dead ends: 291 [2019-12-18 23:36:51,628 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-18 23:36:51,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2019-12-18 23:36:51,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2019-12-18 23:36:51,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2019-12-18 23:36:51,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 715 transitions. [2019-12-18 23:36:51,646 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 715 transitions. Word has length 23 [2019-12-18 23:36:51,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:36:51,647 INFO L462 AbstractCegarLoop]: Abstraction has 291 states and 715 transitions. [2019-12-18 23:36:51,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 23:36:51,647 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 715 transitions. [2019-12-18 23:36:51,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-18 23:36:51,653 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:36:51,654 INFO L411 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] [2019-12-18 23:36:51,654 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:36:51,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:36:51,654 INFO L82 PathProgramCache]: Analyzing trace with hash -962769584, now seen corresponding path program 1 times [2019-12-18 23:36:51,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:36:51,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889770753] [2019-12-18 23:36:51,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:36:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:36:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:51,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889770753] [2019-12-18 23:36:51,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:36:51,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-18 23:36:51,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409555980] [2019-12-18 23:36:51,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-18 23:36:51,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:36:51,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-18 23:36:51,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-18 23:36:51,785 INFO L87 Difference]: Start difference. First operand 291 states and 715 transitions. Second operand 6 states. [2019-12-18 23:36:51,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:36:51,931 INFO L93 Difference]: Finished difference Result 438 states and 1058 transitions. [2019-12-18 23:36:51,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 23:36:51,932 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-12-18 23:36:51,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:36:51,934 INFO L225 Difference]: With dead ends: 438 [2019-12-18 23:36:51,935 INFO L226 Difference]: Without dead ends: 310 [2019-12-18 23:36:51,936 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-18 23:36:51,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2019-12-18 23:36:51,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 300. [2019-12-18 23:36:51,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2019-12-18 23:36:51,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 733 transitions. [2019-12-18 23:36:51,952 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 733 transitions. Word has length 26 [2019-12-18 23:36:51,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:36:51,952 INFO L462 AbstractCegarLoop]: Abstraction has 300 states and 733 transitions. [2019-12-18 23:36:51,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-18 23:36:51,953 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 733 transitions. [2019-12-18 23:36:51,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-18 23:36:51,956 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:36:51,957 INFO L411 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] [2019-12-18 23:36:51,957 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:36:51,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:36:51,958 INFO L82 PathProgramCache]: Analyzing trace with hash -971706884, now seen corresponding path program 2 times [2019-12-18 23:36:51,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:36:51,958 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174747286] [2019-12-18 23:36:51,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:36:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:36:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:52,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174747286] [2019-12-18 23:36:52,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:36:52,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-18 23:36:52,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979604045] [2019-12-18 23:36:52,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-18 23:36:52,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:36:52,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-18 23:36:52,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-18 23:36:52,120 INFO L87 Difference]: Start difference. First operand 300 states and 733 transitions. Second operand 6 states. [2019-12-18 23:36:52,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:36:52,238 INFO L93 Difference]: Finished difference Result 457 states and 1096 transitions. [2019-12-18 23:36:52,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 23:36:52,239 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-12-18 23:36:52,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:36:52,242 INFO L225 Difference]: With dead ends: 457 [2019-12-18 23:36:52,242 INFO L226 Difference]: Without dead ends: 320 [2019-12-18 23:36:52,243 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-12-18 23:36:52,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-12-18 23:36:52,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-12-18 23:36:52,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-12-18 23:36:52,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 773 transitions. [2019-12-18 23:36:52,256 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 773 transitions. Word has length 26 [2019-12-18 23:36:52,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:36:52,258 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 773 transitions. [2019-12-18 23:36:52,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-18 23:36:52,264 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 773 transitions. [2019-12-18 23:36:52,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-18 23:36:52,265 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:36:52,266 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-12-18 23:36:52,266 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:36:52,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:36:52,266 INFO L82 PathProgramCache]: Analyzing trace with hash -327915495, now seen corresponding path program 1 times [2019-12-18 23:36:52,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:36:52,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706125542] [2019-12-18 23:36:52,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:36:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:36:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:52,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706125542] [2019-12-18 23:36:52,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235538026] [2019-12-18 23:36:52,442 INFO L94 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 [2019-12-18 23:36:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:36:52,508 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 23:36:52,515 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:36:52,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:52,567 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:52,574 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:52,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:36:52,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-18 23:36:52,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041367165] [2019-12-18 23:36:52,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 23:36:52,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:36:52,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 23:36:52,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-12-18 23:36:52,584 INFO L87 Difference]: Start difference. First operand 320 states and 773 transitions. Second operand 8 states. [2019-12-18 23:36:52,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:36:52,721 INFO L93 Difference]: Finished difference Result 565 states and 1361 transitions. [2019-12-18 23:36:52,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 23:36:52,722 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-12-18 23:36:52,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:36:52,726 INFO L225 Difference]: With dead ends: 565 [2019-12-18 23:36:52,726 INFO L226 Difference]: Without dead ends: 376 [2019-12-18 23:36:52,727 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-12-18 23:36:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2019-12-18 23:36:52,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 364. [2019-12-18 23:36:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2019-12-18 23:36:52,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 865 transitions. [2019-12-18 23:36:52,748 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 865 transitions. Word has length 30 [2019-12-18 23:36:52,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:36:52,749 INFO L462 AbstractCegarLoop]: Abstraction has 364 states and 865 transitions. [2019-12-18 23:36:52,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 23:36:52,749 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 865 transitions. [2019-12-18 23:36:52,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-18 23:36:52,752 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:36:52,752 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-12-18 23:36:52,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:36:52,956 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:36:52,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:36:52,957 INFO L82 PathProgramCache]: Analyzing trace with hash -243930643, now seen corresponding path program 1 times [2019-12-18 23:36:52,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:36:52,958 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074234305] [2019-12-18 23:36:52,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:36:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:36:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:53,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074234305] [2019-12-18 23:36:53,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667520680] [2019-12-18 23:36:53,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:36:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:36:53,122 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 23:36:53,124 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:36:53,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:53,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:53,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:36:53,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-18 23:36:53,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474696550] [2019-12-18 23:36:53,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 23:36:53,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:36:53,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 23:36:53,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-12-18 23:36:53,147 INFO L87 Difference]: Start difference. First operand 364 states and 865 transitions. Second operand 8 states. [2019-12-18 23:36:53,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:36:53,233 INFO L93 Difference]: Finished difference Result 523 states and 1228 transitions. [2019-12-18 23:36:53,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 23:36:53,233 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-12-18 23:36:53,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:36:53,236 INFO L225 Difference]: With dead ends: 523 [2019-12-18 23:36:53,237 INFO L226 Difference]: Without dead ends: 392 [2019-12-18 23:36:53,237 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-12-18 23:36:53,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2019-12-18 23:36:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 380. [2019-12-18 23:36:53,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2019-12-18 23:36:53,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 897 transitions. [2019-12-18 23:36:53,251 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 897 transitions. Word has length 30 [2019-12-18 23:36:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:36:53,251 INFO L462 AbstractCegarLoop]: Abstraction has 380 states and 897 transitions. [2019-12-18 23:36:53,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 23:36:53,252 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 897 transitions. [2019-12-18 23:36:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-18 23:36:53,252 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:36:53,253 INFO L411 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] [2019-12-18 23:36:53,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:36:53,457 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:36:53,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:36:53,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1975292362, now seen corresponding path program 1 times [2019-12-18 23:36:53,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:36:53,458 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876712738] [2019-12-18 23:36:53,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:36:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:36:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:53,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876712738] [2019-12-18 23:36:53,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037666198] [2019-12-18 23:36:53,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-12-18 23:36:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:36:53,655 INFO L264 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 23:36:53,659 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:36:53,698 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:53,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:53,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:53,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:36:53,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-18 23:36:53,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129864591] [2019-12-18 23:36:53,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-18 23:36:53,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:36:53,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-18 23:36:53,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-12-18 23:36:53,714 INFO L87 Difference]: Start difference. First operand 380 states and 897 transitions. Second operand 9 states. [2019-12-18 23:36:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:36:53,876 INFO L93 Difference]: Finished difference Result 637 states and 1505 transitions. [2019-12-18 23:36:53,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 23:36:53,877 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2019-12-18 23:36:53,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:36:53,885 INFO L225 Difference]: With dead ends: 637 [2019-12-18 23:36:53,886 INFO L226 Difference]: Without dead ends: 448 [2019-12-18 23:36:53,886 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2019-12-18 23:36:53,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2019-12-18 23:36:53,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 354. [2019-12-18 23:36:53,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2019-12-18 23:36:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 841 transitions. [2019-12-18 23:36:53,901 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 841 transitions. Word has length 34 [2019-12-18 23:36:53,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:36:53,905 INFO L462 AbstractCegarLoop]: Abstraction has 354 states and 841 transitions. [2019-12-18 23:36:53,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-18 23:36:53,905 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 841 transitions. [2019-12-18 23:36:53,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-18 23:36:53,907 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:36:53,907 INFO L411 BasicCegarLoop]: trace histogram [3, 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] [2019-12-18 23:36:54,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:36:54,120 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:36:54,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:36:54,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1246329683, now seen corresponding path program 2 times [2019-12-18 23:36:54,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:36:54,121 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777919029] [2019-12-18 23:36:54,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:36:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:36:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:54,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777919029] [2019-12-18 23:36:54,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455000771] [2019-12-18 23:36:54,248 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-12-18 23:36:54,314 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:36:54,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:36:54,315 INFO L264 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 23:36:54,317 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:36:54,350 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:54,352 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:54,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:54,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:36:54,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-18 23:36:54,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704250928] [2019-12-18 23:36:54,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 23:36:54,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:36:54,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 23:36:54,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-12-18 23:36:54,359 INFO L87 Difference]: Start difference. First operand 354 states and 841 transitions. Second operand 10 states. [2019-12-18 23:36:54,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:36:54,563 INFO L93 Difference]: Finished difference Result 807 states and 1894 transitions. [2019-12-18 23:36:54,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 23:36:54,563 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2019-12-18 23:36:54,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:36:54,567 INFO L225 Difference]: With dead ends: 807 [2019-12-18 23:36:54,567 INFO L226 Difference]: Without dead ends: 512 [2019-12-18 23:36:54,568 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:36:54,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2019-12-18 23:36:54,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 373. [2019-12-18 23:36:54,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2019-12-18 23:36:54,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 879 transitions. [2019-12-18 23:36:54,583 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 879 transitions. Word has length 38 [2019-12-18 23:36:54,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:36:54,583 INFO L462 AbstractCegarLoop]: Abstraction has 373 states and 879 transitions. [2019-12-18 23:36:54,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 23:36:54,584 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 879 transitions. [2019-12-18 23:36:54,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-18 23:36:54,586 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:36:54,586 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-12-18 23:36:54,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:36:54,790 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:36:54,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:36:54,790 INFO L82 PathProgramCache]: Analyzing trace with hash 259200112, now seen corresponding path program 3 times [2019-12-18 23:36:54,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:36:54,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110528870] [2019-12-18 23:36:54,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:36:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:36:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:54,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110528870] [2019-12-18 23:36:54,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461353635] [2019-12-18 23:36:54,905 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-18 23:36:54,975 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 23:36:54,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:36:54,977 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 23:36:54,979 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:36:55,004 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:55,006 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:55,007 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:55,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:36:55,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-18 23:36:55,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142816410] [2019-12-18 23:36:55,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-18 23:36:55,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:36:55,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-18 23:36:55,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-12-18 23:36:55,013 INFO L87 Difference]: Start difference. First operand 373 states and 879 transitions. Second operand 11 states. [2019-12-18 23:36:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:36:55,243 INFO L93 Difference]: Finished difference Result 823 states and 1926 transitions. [2019-12-18 23:36:55,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 23:36:55,244 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2019-12-18 23:36:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:36:55,247 INFO L225 Difference]: With dead ends: 823 [2019-12-18 23:36:55,247 INFO L226 Difference]: Without dead ends: 480 [2019-12-18 23:36:55,247 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:36:55,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2019-12-18 23:36:55,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 362. [2019-12-18 23:36:55,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2019-12-18 23:36:55,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 857 transitions. [2019-12-18 23:36:55,259 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 857 transitions. Word has length 42 [2019-12-18 23:36:55,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:36:55,259 INFO L462 AbstractCegarLoop]: Abstraction has 362 states and 857 transitions. [2019-12-18 23:36:55,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-18 23:36:55,259 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 857 transitions. [2019-12-18 23:36:55,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-12-18 23:36:55,260 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:36:55,260 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:36:55,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:36:55,464 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:36:55,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:36:55,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1361267571, now seen corresponding path program 4 times [2019-12-18 23:36:55,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:36:55,465 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829674133] [2019-12-18 23:36:55,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:36:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:36:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:55,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829674133] [2019-12-18 23:36:55,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726042352] [2019-12-18 23:36:55,579 INFO L92 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 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 [2019-12-18 23:36:55,626 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:36:55,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:36:55,628 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:36:55,630 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:36:55,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:55,660 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:55,662 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:55,667 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:55,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:36:55,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-18 23:36:55,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038346327] [2019-12-18 23:36:55,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 23:36:55,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:36:55,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 23:36:55,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-12-18 23:36:55,670 INFO L87 Difference]: Start difference. First operand 362 states and 857 transitions. Second operand 12 states. [2019-12-18 23:36:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:36:55,870 INFO L93 Difference]: Finished difference Result 709 states and 1649 transitions. [2019-12-18 23:36:55,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 23:36:55,870 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2019-12-18 23:36:55,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:36:55,873 INFO L225 Difference]: With dead ends: 709 [2019-12-18 23:36:55,873 INFO L226 Difference]: Without dead ends: 496 [2019-12-18 23:36:55,874 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2019-12-18 23:36:55,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2019-12-18 23:36:55,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 381. [2019-12-18 23:36:55,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2019-12-18 23:36:55,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 895 transitions. [2019-12-18 23:36:55,886 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 895 transitions. Word has length 46 [2019-12-18 23:36:55,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:36:55,886 INFO L462 AbstractCegarLoop]: Abstraction has 381 states and 895 transitions. [2019-12-18 23:36:55,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 23:36:55,886 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 895 transitions. [2019-12-18 23:36:55,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-12-18 23:36:55,887 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:36:55,887 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:36:56,091 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:36:56,091 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:36:56,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:36:56,092 INFO L82 PathProgramCache]: Analyzing trace with hash -316809046, now seen corresponding path program 5 times [2019-12-18 23:36:56,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:36:56,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282219999] [2019-12-18 23:36:56,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:36:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:36:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:56,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282219999] [2019-12-18 23:36:56,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936529757] [2019-12-18 23:36:56,224 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:36:56,281 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 23:36:56,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:36:56,282 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:36:56,285 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:36:56,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:56,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:56,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:56,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:36:56,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-18 23:36:56,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485506398] [2019-12-18 23:36:56,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-18 23:36:56,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:36:56,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-18 23:36:56,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-12-18 23:36:56,320 INFO L87 Difference]: Start difference. First operand 381 states and 895 transitions. Second operand 13 states. [2019-12-18 23:36:56,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:36:56,627 INFO L93 Difference]: Finished difference Result 769 states and 1769 transitions. [2019-12-18 23:36:56,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 23:36:56,628 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2019-12-18 23:36:56,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:36:56,633 INFO L225 Difference]: With dead ends: 769 [2019-12-18 23:36:56,633 INFO L226 Difference]: Without dead ends: 580 [2019-12-18 23:36:56,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2019-12-18 23:36:56,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2019-12-18 23:36:56,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 540. [2019-12-18 23:36:56,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2019-12-18 23:36:56,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1217 transitions. [2019-12-18 23:36:56,655 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1217 transitions. Word has length 50 [2019-12-18 23:36:56,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:36:56,655 INFO L462 AbstractCegarLoop]: Abstraction has 540 states and 1217 transitions. [2019-12-18 23:36:56,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-18 23:36:56,656 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1217 transitions. [2019-12-18 23:36:56,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-12-18 23:36:56,658 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:36:56,658 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:36:56,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:36:56,872 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:36:56,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:36:56,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1532488761, now seen corresponding path program 6 times [2019-12-18 23:36:56,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:36:56,873 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69411318] [2019-12-18 23:36:56,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:36:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:36:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:57,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69411318] [2019-12-18 23:36:57,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455540004] [2019-12-18 23:36:57,007 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-18 23:36:57,070 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-18 23:36:57,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:36:57,071 INFO L264 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:36:57,076 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:36:57,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:57,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:57,103 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:57,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:36:57,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-18 23:36:57,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350994986] [2019-12-18 23:36:57,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 23:36:57,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:36:57,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 23:36:57,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-12-18 23:36:57,112 INFO L87 Difference]: Start difference. First operand 540 states and 1217 transitions. Second operand 14 states. [2019-12-18 23:36:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:36:57,376 INFO L93 Difference]: Finished difference Result 813 states and 1857 transitions. [2019-12-18 23:36:57,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 23:36:57,376 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2019-12-18 23:36:57,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:36:57,380 INFO L225 Difference]: With dead ends: 813 [2019-12-18 23:36:57,380 INFO L226 Difference]: Without dead ends: 624 [2019-12-18 23:36:57,381 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2019-12-18 23:36:57,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2019-12-18 23:36:57,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 437. [2019-12-18 23:36:57,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-12-18 23:36:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1007 transitions. [2019-12-18 23:36:57,394 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1007 transitions. Word has length 54 [2019-12-18 23:36:57,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:36:57,395 INFO L462 AbstractCegarLoop]: Abstraction has 437 states and 1007 transitions. [2019-12-18 23:36:57,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 23:36:57,395 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1007 transitions. [2019-12-18 23:36:57,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-12-18 23:36:57,396 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:36:57,396 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:36:57,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:36:57,609 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:36:57,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:36:57,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1598172444, now seen corresponding path program 7 times [2019-12-18 23:36:57,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:36:57,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596900619] [2019-12-18 23:36:57,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:36:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:36:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:57,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596900619] [2019-12-18 23:36:57,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217364417] [2019-12-18 23:36:57,785 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-12-18 23:36:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:36:57,848 INFO L264 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-18 23:36:57,853 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:36:57,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:57,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:57,903 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:57,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:36:57,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-18 23:36:57,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135199699] [2019-12-18 23:36:57,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-18 23:36:57,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:36:57,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-18 23:36:57,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-12-18 23:36:57,909 INFO L87 Difference]: Start difference. First operand 437 states and 1007 transitions. Second operand 15 states. [2019-12-18 23:36:58,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:36:58,245 INFO L93 Difference]: Finished difference Result 951 states and 2182 transitions. [2019-12-18 23:36:58,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 23:36:58,246 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2019-12-18 23:36:58,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:36:58,249 INFO L225 Difference]: With dead ends: 951 [2019-12-18 23:36:58,249 INFO L226 Difference]: Without dead ends: 608 [2019-12-18 23:36:58,250 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-12-18 23:36:58,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2019-12-18 23:36:58,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 426. [2019-12-18 23:36:58,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2019-12-18 23:36:58,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 985 transitions. [2019-12-18 23:36:58,263 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 985 transitions. Word has length 58 [2019-12-18 23:36:58,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:36:58,263 INFO L462 AbstractCegarLoop]: Abstraction has 426 states and 985 transitions. [2019-12-18 23:36:58,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-18 23:36:58,264 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 985 transitions. [2019-12-18 23:36:58,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-12-18 23:36:58,264 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:36:58,265 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:36:58,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:36:58,468 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:36:58,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:36:58,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1675257599, now seen corresponding path program 8 times [2019-12-18 23:36:58,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:36:58,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205522225] [2019-12-18 23:36:58,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:36:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:36:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:58,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205522225] [2019-12-18 23:36:58,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688649273] [2019-12-18 23:36:58,627 INFO L92 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 [2019-12-18 23:36:58,694 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:36:58,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:36:58,695 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-18 23:36:58,705 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:36:58,754 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:58,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:58,756 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:58,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:36:58,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-18 23:36:58,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519296188] [2019-12-18 23:36:58,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 23:36:58,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:36:58,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 23:36:58,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:36:58,769 INFO L87 Difference]: Start difference. First operand 426 states and 985 transitions. Second operand 16 states. [2019-12-18 23:36:59,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:36:59,094 INFO L93 Difference]: Finished difference Result 853 states and 1937 transitions. [2019-12-18 23:36:59,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 23:36:59,094 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2019-12-18 23:36:59,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:36:59,099 INFO L225 Difference]: With dead ends: 853 [2019-12-18 23:36:59,099 INFO L226 Difference]: Without dead ends: 664 [2019-12-18 23:36:59,100 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=581, Unknown=0, NotChecked=0, Total=812 [2019-12-18 23:36:59,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2019-12-18 23:36:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 636. [2019-12-18 23:36:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-12-18 23:36:59,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1409 transitions. [2019-12-18 23:36:59,114 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1409 transitions. Word has length 62 [2019-12-18 23:36:59,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:36:59,114 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1409 transitions. [2019-12-18 23:36:59,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 23:36:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1409 transitions. [2019-12-18 23:36:59,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-12-18 23:36:59,116 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:36:59,116 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:36:59,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:36:59,320 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:36:59,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:36:59,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1915950306, now seen corresponding path program 9 times [2019-12-18 23:36:59,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:36:59,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723155667] [2019-12-18 23:36:59,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:36:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:36:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:59,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723155667] [2019-12-18 23:36:59,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476202606] [2019-12-18 23:36:59,515 INFO L92 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 [2019-12-18 23:36:59,576 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-18 23:36:59,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:36:59,577 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-18 23:36:59,579 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:36:59,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:59,613 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:59,614 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:36:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:36:59,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:36:59,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-18 23:36:59,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493578237] [2019-12-18 23:36:59,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-18 23:36:59,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:36:59,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-18 23:36:59,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-12-18 23:36:59,624 INFO L87 Difference]: Start difference. First operand 636 states and 1409 transitions. Second operand 17 states. [2019-12-18 23:36:59,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:36:59,963 INFO L93 Difference]: Finished difference Result 893 states and 2017 transitions. [2019-12-18 23:36:59,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 23:36:59,970 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2019-12-18 23:36:59,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:36:59,973 INFO L225 Difference]: With dead ends: 893 [2019-12-18 23:36:59,973 INFO L226 Difference]: Without dead ends: 704 [2019-12-18 23:36:59,974 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=664, Unknown=0, NotChecked=0, Total=930 [2019-12-18 23:36:59,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2019-12-18 23:36:59,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 482. [2019-12-18 23:36:59,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2019-12-18 23:36:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1097 transitions. [2019-12-18 23:36:59,986 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1097 transitions. Word has length 66 [2019-12-18 23:36:59,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:36:59,986 INFO L462 AbstractCegarLoop]: Abstraction has 482 states and 1097 transitions. [2019-12-18 23:36:59,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-18 23:36:59,987 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1097 transitions. [2019-12-18 23:36:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-12-18 23:36:59,988 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:36:59,988 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:00,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:00,192 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:00,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:00,192 INFO L82 PathProgramCache]: Analyzing trace with hash -338738117, now seen corresponding path program 10 times [2019-12-18 23:37:00,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:00,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496616133] [2019-12-18 23:37:00,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:00,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:00,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496616133] [2019-12-18 23:37:00,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150814426] [2019-12-18 23:37:00,375 INFO L92 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 [2019-12-18 23:37:00,443 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:37:00,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:00,444 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-18 23:37:00,446 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:00,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:00,481 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:00,484 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:00,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:00,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-18 23:37:00,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888139571] [2019-12-18 23:37:00,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:37:00,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:00,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:37:00,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:37:00,493 INFO L87 Difference]: Start difference. First operand 482 states and 1097 transitions. Second operand 18 states. [2019-12-18 23:37:00,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:00,913 INFO L93 Difference]: Finished difference Result 1063 states and 2406 transitions. [2019-12-18 23:37:00,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 23:37:00,913 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2019-12-18 23:37:00,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:00,917 INFO L225 Difference]: With dead ends: 1063 [2019-12-18 23:37:00,917 INFO L226 Difference]: Without dead ends: 768 [2019-12-18 23:37:00,918 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=312, Invalid=810, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 23:37:00,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-12-18 23:37:00,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 501. [2019-12-18 23:37:00,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2019-12-18 23:37:00,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1135 transitions. [2019-12-18 23:37:00,930 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1135 transitions. Word has length 70 [2019-12-18 23:37:00,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:00,930 INFO L462 AbstractCegarLoop]: Abstraction has 501 states and 1135 transitions. [2019-12-18 23:37:00,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:37:00,931 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1135 transitions. [2019-12-18 23:37:00,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-12-18 23:37:00,932 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:00,932 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:01,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:01,135 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:01,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:01,136 INFO L82 PathProgramCache]: Analyzing trace with hash -37410472, now seen corresponding path program 11 times [2019-12-18 23:37:01,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:01,136 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871439795] [2019-12-18 23:37:01,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:01,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871439795] [2019-12-18 23:37:01,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802927241] [2019-12-18 23:37:01,325 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:01,396 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-12-18 23:37:01,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:01,397 INFO L264 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-18 23:37:01,398 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:01,417 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:01,418 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:01,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:01,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:01,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-18 23:37:01,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166599670] [2019-12-18 23:37:01,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-18 23:37:01,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:01,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-18 23:37:01,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-12-18 23:37:01,427 INFO L87 Difference]: Start difference. First operand 501 states and 1135 transitions. Second operand 19 states. [2019-12-18 23:37:01,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:01,833 INFO L93 Difference]: Finished difference Result 1079 states and 2438 transitions. [2019-12-18 23:37:01,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-18 23:37:01,834 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 74 [2019-12-18 23:37:01,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:01,837 INFO L225 Difference]: With dead ends: 1079 [2019-12-18 23:37:01,837 INFO L226 Difference]: Without dead ends: 784 [2019-12-18 23:37:01,838 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=908, Unknown=0, NotChecked=0, Total=1260 [2019-12-18 23:37:01,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2019-12-18 23:37:01,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 514. [2019-12-18 23:37:01,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2019-12-18 23:37:01,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1161 transitions. [2019-12-18 23:37:01,849 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1161 transitions. Word has length 74 [2019-12-18 23:37:01,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:01,850 INFO L462 AbstractCegarLoop]: Abstraction has 514 states and 1161 transitions. [2019-12-18 23:37:01,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-18 23:37:01,850 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1161 transitions. [2019-12-18 23:37:01,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-12-18 23:37:01,851 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:01,851 INFO L411 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:02,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:02,055 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:02,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:02,056 INFO L82 PathProgramCache]: Analyzing trace with hash -803269259, now seen corresponding path program 12 times [2019-12-18 23:37:02,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:02,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395175969] [2019-12-18 23:37:02,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:02,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395175969] [2019-12-18 23:37:02,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373914744] [2019-12-18 23:37:02,278 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-18 23:37:02,344 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-12-18 23:37:02,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:02,347 INFO L264 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-18 23:37:02,348 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:02,375 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:02,376 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:02,377 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:02,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:02,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-18 23:37:02,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547987110] [2019-12-18 23:37:02,385 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:37:02,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:02,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:37:02,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:37:02,385 INFO L87 Difference]: Start difference. First operand 514 states and 1161 transitions. Second operand 20 states. [2019-12-18 23:37:02,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:02,866 INFO L93 Difference]: Finished difference Result 1111 states and 2502 transitions. [2019-12-18 23:37:02,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 23:37:02,867 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 78 [2019-12-18 23:37:02,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:02,871 INFO L225 Difference]: With dead ends: 1111 [2019-12-18 23:37:02,872 INFO L226 Difference]: Without dead ends: 792 [2019-12-18 23:37:02,872 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2019-12-18 23:37:02,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2019-12-18 23:37:02,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 764. [2019-12-18 23:37:02,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 764 states. [2019-12-18 23:37:02,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1665 transitions. [2019-12-18 23:37:02,886 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1665 transitions. Word has length 78 [2019-12-18 23:37:02,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:02,886 INFO L462 AbstractCegarLoop]: Abstraction has 764 states and 1665 transitions. [2019-12-18 23:37:02,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:37:02,886 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1665 transitions. [2019-12-18 23:37:02,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-12-18 23:37:02,888 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:02,888 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:03,091 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:03,091 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:03,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:03,092 INFO L82 PathProgramCache]: Analyzing trace with hash 539004306, now seen corresponding path program 13 times [2019-12-18 23:37:03,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:03,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005301827] [2019-12-18 23:37:03,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:03,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005301827] [2019-12-18 23:37:03,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625818292] [2019-12-18 23:37:03,310 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-12-18 23:37:03,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:03,385 INFO L264 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-18 23:37:03,386 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:03,428 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:03,429 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:03,430 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:03,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:03,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-18 23:37:03,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765012662] [2019-12-18 23:37:03,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-18 23:37:03,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:03,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-18 23:37:03,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2019-12-18 23:37:03,445 INFO L87 Difference]: Start difference. First operand 764 states and 1665 transitions. Second operand 21 states. [2019-12-18 23:37:03,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:03,967 INFO L93 Difference]: Finished difference Result 1147 states and 2574 transitions. [2019-12-18 23:37:03,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 23:37:03,967 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 82 [2019-12-18 23:37:03,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:03,971 INFO L225 Difference]: With dead ends: 1147 [2019-12-18 23:37:03,971 INFO L226 Difference]: Without dead ends: 852 [2019-12-18 23:37:03,971 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=438, Invalid=1122, Unknown=0, NotChecked=0, Total=1560 [2019-12-18 23:37:03,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2019-12-18 23:37:03,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 796. [2019-12-18 23:37:03,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2019-12-18 23:37:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1729 transitions. [2019-12-18 23:37:03,985 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1729 transitions. Word has length 82 [2019-12-18 23:37:03,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:03,986 INFO L462 AbstractCegarLoop]: Abstraction has 796 states and 1729 transitions. [2019-12-18 23:37:03,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-18 23:37:03,986 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1729 transitions. [2019-12-18 23:37:03,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-12-18 23:37:03,988 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:03,988 INFO L411 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:04,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:04,195 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:04,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:04,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1804537007, now seen corresponding path program 14 times [2019-12-18 23:37:04,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:04,196 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879067535] [2019-12-18 23:37:04,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:04,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879067535] [2019-12-18 23:37:04,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145698605] [2019-12-18 23:37:04,469 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:04,541 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:37:04,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:04,542 INFO L264 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-18 23:37:04,544 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:04,593 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:04,593 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:04,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:04,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:04,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-18 23:37:04,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842122813] [2019-12-18 23:37:04,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:37:04,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:04,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:37:04,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2019-12-18 23:37:04,613 INFO L87 Difference]: Start difference. First operand 796 states and 1729 transitions. Second operand 22 states. [2019-12-18 23:37:05,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:05,136 INFO L93 Difference]: Finished difference Result 1069 states and 2369 transitions. [2019-12-18 23:37:05,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 23:37:05,136 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 86 [2019-12-18 23:37:05,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:05,141 INFO L225 Difference]: With dead ends: 1069 [2019-12-18 23:37:05,141 INFO L226 Difference]: Without dead ends: 880 [2019-12-18 23:37:05,142 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=474, Invalid=1166, Unknown=0, NotChecked=0, Total=1640 [2019-12-18 23:37:05,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2019-12-18 23:37:05,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 565. [2019-12-18 23:37:05,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 565 states. [2019-12-18 23:37:05,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 1263 transitions. [2019-12-18 23:37:05,154 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 1263 transitions. Word has length 86 [2019-12-18 23:37:05,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:05,155 INFO L462 AbstractCegarLoop]: Abstraction has 565 states and 1263 transitions. [2019-12-18 23:37:05,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 23:37:05,155 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 1263 transitions. [2019-12-18 23:37:05,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-12-18 23:37:05,156 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:05,156 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:05,359 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:05,360 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:05,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:05,360 INFO L82 PathProgramCache]: Analyzing trace with hash 173610956, now seen corresponding path program 15 times [2019-12-18 23:37:05,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:05,361 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73755261] [2019-12-18 23:37:05,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:05,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73755261] [2019-12-18 23:37:05,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708676343] [2019-12-18 23:37:05,710 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-18 23:37:05,786 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-12-18 23:37:05,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:05,787 INFO L264 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-18 23:37:05,789 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:05,810 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:05,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:05,812 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:05,820 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:05,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:05,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-18 23:37:05,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584328321] [2019-12-18 23:37:05,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-18 23:37:05,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:05,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-18 23:37:05,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2019-12-18 23:37:05,822 INFO L87 Difference]: Start difference. First operand 565 states and 1263 transitions. Second operand 23 states. [2019-12-18 23:37:06,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:06,421 INFO L93 Difference]: Finished difference Result 1207 states and 2694 transitions. [2019-12-18 23:37:06,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 23:37:06,422 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 90 [2019-12-18 23:37:06,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:06,427 INFO L225 Difference]: With dead ends: 1207 [2019-12-18 23:37:06,428 INFO L226 Difference]: Without dead ends: 864 [2019-12-18 23:37:06,428 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=534, Invalid=1358, Unknown=0, NotChecked=0, Total=1892 [2019-12-18 23:37:06,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2019-12-18 23:37:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 554. [2019-12-18 23:37:06,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-12-18 23:37:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1241 transitions. [2019-12-18 23:37:06,440 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1241 transitions. Word has length 90 [2019-12-18 23:37:06,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:06,441 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 1241 transitions. [2019-12-18 23:37:06,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-18 23:37:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1241 transitions. [2019-12-18 23:37:06,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-12-18 23:37:06,442 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:06,443 INFO L411 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:06,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:06,653 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:06,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:06,654 INFO L82 PathProgramCache]: Analyzing trace with hash -963040791, now seen corresponding path program 16 times [2019-12-18 23:37:06,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:06,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400399675] [2019-12-18 23:37:06,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:06,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400399675] [2019-12-18 23:37:06,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515691507] [2019-12-18 23:37:06,940 INFO L92 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 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 [2019-12-18 23:37:07,005 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:37:07,005 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:07,007 INFO L264 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-18 23:37:07,009 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:07,077 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:07,077 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:07,078 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:07,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:07,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-12-18 23:37:07,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965236666] [2019-12-18 23:37:07,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-18 23:37:07,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:07,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-18 23:37:07,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2019-12-18 23:37:07,090 INFO L87 Difference]: Start difference. First operand 554 states and 1241 transitions. Second operand 24 states. [2019-12-18 23:37:07,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:07,690 INFO L93 Difference]: Finished difference Result 1093 states and 2417 transitions. [2019-12-18 23:37:07,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 23:37:07,690 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 94 [2019-12-18 23:37:07,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:07,695 INFO L225 Difference]: With dead ends: 1093 [2019-12-18 23:37:07,695 INFO L226 Difference]: Without dead ends: 880 [2019-12-18 23:37:07,696 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2019-12-18 23:37:07,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2019-12-18 23:37:07,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 573. [2019-12-18 23:37:07,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 573 states. [2019-12-18 23:37:07,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1279 transitions. [2019-12-18 23:37:07,709 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1279 transitions. Word has length 94 [2019-12-18 23:37:07,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:07,710 INFO L462 AbstractCegarLoop]: Abstraction has 573 states and 1279 transitions. [2019-12-18 23:37:07,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-18 23:37:07,710 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1279 transitions. [2019-12-18 23:37:07,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-12-18 23:37:07,711 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:07,712 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:07,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:07,916 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:07,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:07,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1209481210, now seen corresponding path program 17 times [2019-12-18 23:37:07,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:07,917 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255188941] [2019-12-18 23:37:07,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:08,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255188941] [2019-12-18 23:37:08,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045326097] [2019-12-18 23:37:08,197 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:08,268 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-12-18 23:37:08,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:08,270 INFO L264 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-18 23:37:08,272 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:08,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:08,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:08,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:08,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:08,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-12-18 23:37:08,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273472861] [2019-12-18 23:37:08,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-18 23:37:08,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:08,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-18 23:37:08,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2019-12-18 23:37:08,322 INFO L87 Difference]: Start difference. First operand 573 states and 1279 transitions. Second operand 25 states. [2019-12-18 23:37:09,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:09,090 INFO L93 Difference]: Finished difference Result 1153 states and 2537 transitions. [2019-12-18 23:37:09,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-18 23:37:09,091 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 98 [2019-12-18 23:37:09,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:09,098 INFO L225 Difference]: With dead ends: 1153 [2019-12-18 23:37:09,098 INFO L226 Difference]: Without dead ends: 964 [2019-12-18 23:37:09,099 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=630, Invalid=1532, Unknown=0, NotChecked=0, Total=2162 [2019-12-18 23:37:09,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2019-12-18 23:37:09,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 924. [2019-12-18 23:37:09,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 924 states. [2019-12-18 23:37:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1985 transitions. [2019-12-18 23:37:09,122 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1985 transitions. Word has length 98 [2019-12-18 23:37:09,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:09,123 INFO L462 AbstractCegarLoop]: Abstraction has 924 states and 1985 transitions. [2019-12-18 23:37:09,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-18 23:37:09,123 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1985 transitions. [2019-12-18 23:37:09,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-12-18 23:37:09,127 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:09,127 INFO L411 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:09,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:09,333 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:09,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:09,333 INFO L82 PathProgramCache]: Analyzing trace with hash -810062557, now seen corresponding path program 18 times [2019-12-18 23:37:09,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:09,334 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937222174] [2019-12-18 23:37:09,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:09,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937222174] [2019-12-18 23:37:09,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312479157] [2019-12-18 23:37:09,611 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-18 23:37:09,693 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-12-18 23:37:09,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:09,694 INFO L264 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-18 23:37:09,696 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:09,720 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:09,721 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:09,722 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:09,733 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:09,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:09,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-12-18 23:37:09,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180824114] [2019-12-18 23:37:09,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-18 23:37:09,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:09,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-18 23:37:09,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2019-12-18 23:37:09,735 INFO L87 Difference]: Start difference. First operand 924 states and 1985 transitions. Second operand 26 states. [2019-12-18 23:37:10,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:10,386 INFO L93 Difference]: Finished difference Result 1181 states and 2593 transitions. [2019-12-18 23:37:10,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-18 23:37:10,386 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 102 [2019-12-18 23:37:10,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:10,392 INFO L225 Difference]: With dead ends: 1181 [2019-12-18 23:37:10,392 INFO L226 Difference]: Without dead ends: 968 [2019-12-18 23:37:10,393 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=686, Invalid=1666, Unknown=0, NotChecked=0, Total=2352 [2019-12-18 23:37:10,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2019-12-18 23:37:10,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 956. [2019-12-18 23:37:10,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 956 states. [2019-12-18 23:37:10,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2049 transitions. [2019-12-18 23:37:10,407 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2049 transitions. Word has length 102 [2019-12-18 23:37:10,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:10,407 INFO L462 AbstractCegarLoop]: Abstraction has 956 states and 2049 transitions. [2019-12-18 23:37:10,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-18 23:37:10,407 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2049 transitions. [2019-12-18 23:37:10,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-12-18 23:37:10,410 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:10,410 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:10,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:10,619 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:10,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:10,619 INFO L82 PathProgramCache]: Analyzing trace with hash 172596800, now seen corresponding path program 19 times [2019-12-18 23:37:10,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:10,620 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033574365] [2019-12-18 23:37:10,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:10,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033574365] [2019-12-18 23:37:10,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669509330] [2019-12-18 23:37:10,998 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-12-18 23:37:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:11,067 INFO L264 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-18 23:37:11,068 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:11,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:11,114 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:11,115 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:11,123 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:11,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:11,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-12-18 23:37:11,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146952825] [2019-12-18 23:37:11,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-18 23:37:11,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:11,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-18 23:37:11,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2019-12-18 23:37:11,125 INFO L87 Difference]: Start difference. First operand 956 states and 2049 transitions. Second operand 27 states. [2019-12-18 23:37:11,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:11,881 INFO L93 Difference]: Finished difference Result 1339 states and 2958 transitions. [2019-12-18 23:37:11,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-18 23:37:11,881 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 106 [2019-12-18 23:37:11,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:11,886 INFO L225 Difference]: With dead ends: 1339 [2019-12-18 23:37:11,887 INFO L226 Difference]: Without dead ends: 1044 [2019-12-18 23:37:11,888 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=756, Invalid=1896, Unknown=0, NotChecked=0, Total=2652 [2019-12-18 23:37:11,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2019-12-18 23:37:11,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 988. [2019-12-18 23:37:11,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 988 states. [2019-12-18 23:37:11,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 2113 transitions. [2019-12-18 23:37:11,904 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 2113 transitions. Word has length 106 [2019-12-18 23:37:11,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:11,904 INFO L462 AbstractCegarLoop]: Abstraction has 988 states and 2113 transitions. [2019-12-18 23:37:11,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-18 23:37:11,904 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 2113 transitions. [2019-12-18 23:37:11,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-12-18 23:37:11,906 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:11,906 INFO L411 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:12,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:12,107 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:12,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:12,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1533269597, now seen corresponding path program 20 times [2019-12-18 23:37:12,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:12,108 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429971269] [2019-12-18 23:37:12,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:12,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429971269] [2019-12-18 23:37:12,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312782341] [2019-12-18 23:37:12,426 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:12,501 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:37:12,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:12,503 INFO L264 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-18 23:37:12,525 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:12,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:12,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:12,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:12,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:12,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-12-18 23:37:12,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568970320] [2019-12-18 23:37:12,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-18 23:37:12,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:12,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-18 23:37:12,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2019-12-18 23:37:12,570 INFO L87 Difference]: Start difference. First operand 988 states and 2113 transitions. Second operand 28 states. [2019-12-18 23:37:13,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:13,278 INFO L93 Difference]: Finished difference Result 1245 states and 2721 transitions. [2019-12-18 23:37:13,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-18 23:37:13,279 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 110 [2019-12-18 23:37:13,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:13,284 INFO L225 Difference]: With dead ends: 1245 [2019-12-18 23:37:13,284 INFO L226 Difference]: Without dead ends: 1032 [2019-12-18 23:37:13,285 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=807, Invalid=1949, Unknown=0, NotChecked=0, Total=2756 [2019-12-18 23:37:13,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2019-12-18 23:37:13,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 1020. [2019-12-18 23:37:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1020 states. [2019-12-18 23:37:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 2177 transitions. [2019-12-18 23:37:13,302 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 2177 transitions. Word has length 110 [2019-12-18 23:37:13,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:13,303 INFO L462 AbstractCegarLoop]: Abstraction has 1020 states and 2177 transitions. [2019-12-18 23:37:13,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-18 23:37:13,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 2177 transitions. [2019-12-18 23:37:13,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-12-18 23:37:13,305 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:13,306 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:13,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:13,509 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:13,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:13,510 INFO L82 PathProgramCache]: Analyzing trace with hash -923428230, now seen corresponding path program 21 times [2019-12-18 23:37:13,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:13,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139429206] [2019-12-18 23:37:13,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:13,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139429206] [2019-12-18 23:37:13,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571944301] [2019-12-18 23:37:13,942 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-18 23:37:14,021 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-12-18 23:37:14,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:14,022 INFO L264 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-18 23:37:14,024 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:14,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:14,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:14,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:14,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:14,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-12-18 23:37:14,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963717114] [2019-12-18 23:37:14,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-18 23:37:14,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:14,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-18 23:37:14,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2019-12-18 23:37:14,073 INFO L87 Difference]: Start difference. First operand 1020 states and 2177 transitions. Second operand 29 states. [2019-12-18 23:37:14,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:14,920 INFO L93 Difference]: Finished difference Result 1375 states and 3030 transitions. [2019-12-18 23:37:14,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-18 23:37:14,920 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 114 [2019-12-18 23:37:14,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:14,925 INFO L225 Difference]: With dead ends: 1375 [2019-12-18 23:37:14,925 INFO L226 Difference]: Without dead ends: 1056 [2019-12-18 23:37:14,926 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=882, Invalid=2198, Unknown=0, NotChecked=0, Total=3080 [2019-12-18 23:37:14,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2019-12-18 23:37:14,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 650. [2019-12-18 23:37:14,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 650 states. [2019-12-18 23:37:14,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1433 transitions. [2019-12-18 23:37:14,940 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1433 transitions. Word has length 114 [2019-12-18 23:37:14,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:14,941 INFO L462 AbstractCegarLoop]: Abstraction has 650 states and 1433 transitions. [2019-12-18 23:37:14,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-18 23:37:14,941 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1433 transitions. [2019-12-18 23:37:14,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-12-18 23:37:14,942 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:14,943 INFO L411 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:15,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:15,146 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:15,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:15,146 INFO L82 PathProgramCache]: Analyzing trace with hash 605578647, now seen corresponding path program 22 times [2019-12-18 23:37:15,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:15,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068104930] [2019-12-18 23:37:15,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:15,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068104930] [2019-12-18 23:37:15,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519838427] [2019-12-18 23:37:15,715 INFO L92 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 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 [2019-12-18 23:37:15,813 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:37:15,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:15,815 INFO L264 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-18 23:37:15,817 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:15,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:15,853 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:15,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:15,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:15,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-12-18 23:37:15,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782809367] [2019-12-18 23:37:15,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-18 23:37:15,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:15,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-18 23:37:15,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2019-12-18 23:37:15,871 INFO L87 Difference]: Start difference. First operand 650 states and 1433 transitions. Second operand 30 states. [2019-12-18 23:37:16,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:16,698 INFO L93 Difference]: Finished difference Result 1301 states and 2833 transitions. [2019-12-18 23:37:16,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-18 23:37:16,698 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 118 [2019-12-18 23:37:16,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:16,706 INFO L225 Difference]: With dead ends: 1301 [2019-12-18 23:37:16,706 INFO L226 Difference]: Without dead ends: 1112 [2019-12-18 23:37:16,711 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=938, Invalid=2254, Unknown=0, NotChecked=0, Total=3192 [2019-12-18 23:37:16,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2019-12-18 23:37:16,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1084. [2019-12-18 23:37:16,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1084 states. [2019-12-18 23:37:16,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 2305 transitions. [2019-12-18 23:37:16,724 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 2305 transitions. Word has length 118 [2019-12-18 23:37:16,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:16,725 INFO L462 AbstractCegarLoop]: Abstraction has 1084 states and 2305 transitions. [2019-12-18 23:37:16,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-18 23:37:16,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 2305 transitions. [2019-12-18 23:37:16,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-12-18 23:37:16,726 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:16,727 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:16,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:16,930 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:16,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:16,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1587102540, now seen corresponding path program 23 times [2019-12-18 23:37:16,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:16,932 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918881683] [2019-12-18 23:37:16,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:17,327 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:17,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918881683] [2019-12-18 23:37:17,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10108564] [2019-12-18 23:37:17,328 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:17,412 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-12-18 23:37:17,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:17,413 INFO L264 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-18 23:37:17,415 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:17,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:17,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:17,470 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:17,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:17,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-12-18 23:37:17,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743263683] [2019-12-18 23:37:17,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-18 23:37:17,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:17,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-18 23:37:17,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2019-12-18 23:37:17,486 INFO L87 Difference]: Start difference. First operand 1084 states and 2305 transitions. Second operand 31 states. [2019-12-18 23:37:18,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:18,448 INFO L93 Difference]: Finished difference Result 1341 states and 2913 transitions. [2019-12-18 23:37:18,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-18 23:37:18,448 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 122 [2019-12-18 23:37:18,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:18,453 INFO L225 Difference]: With dead ends: 1341 [2019-12-18 23:37:18,453 INFO L226 Difference]: Without dead ends: 1104 [2019-12-18 23:37:18,456 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1008, Invalid=2414, Unknown=0, NotChecked=0, Total=3422 [2019-12-18 23:37:18,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2019-12-18 23:37:18,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 682. [2019-12-18 23:37:18,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-12-18 23:37:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1497 transitions. [2019-12-18 23:37:18,476 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1497 transitions. Word has length 122 [2019-12-18 23:37:18,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:18,476 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1497 transitions. [2019-12-18 23:37:18,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-18 23:37:18,477 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1497 transitions. [2019-12-18 23:37:18,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-12-18 23:37:18,479 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:18,479 INFO L411 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:18,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:18,683 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:18,684 INFO L82 PathProgramCache]: Analyzing trace with hash -900785455, now seen corresponding path program 24 times [2019-12-18 23:37:18,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:18,684 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115695625] [2019-12-18 23:37:18,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:19,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115695625] [2019-12-18 23:37:19,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540860822] [2019-12-18 23:37:19,242 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-18 23:37:19,343 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-12-18 23:37:19,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:19,345 INFO L264 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-18 23:37:19,347 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:19,394 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:19,394 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:19,395 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:19,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:19,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-12-18 23:37:19,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826514249] [2019-12-18 23:37:19,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-18 23:37:19,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:19,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-18 23:37:19,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2019-12-18 23:37:19,413 INFO L87 Difference]: Start difference. First operand 682 states and 1497 transitions. Second operand 32 states. [2019-12-18 23:37:20,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:20,277 INFO L93 Difference]: Finished difference Result 1365 states and 2961 transitions. [2019-12-18 23:37:20,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-18 23:37:20,278 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2019-12-18 23:37:20,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:20,281 INFO L225 Difference]: With dead ends: 1365 [2019-12-18 23:37:20,281 INFO L226 Difference]: Without dead ends: 1176 [2019-12-18 23:37:20,282 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1079, Invalid=2581, Unknown=0, NotChecked=0, Total=3660 [2019-12-18 23:37:20,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2019-12-18 23:37:20,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1148. [2019-12-18 23:37:20,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1148 states. [2019-12-18 23:37:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 2433 transitions. [2019-12-18 23:37:20,295 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 2433 transitions. Word has length 126 [2019-12-18 23:37:20,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:20,295 INFO L462 AbstractCegarLoop]: Abstraction has 1148 states and 2433 transitions. [2019-12-18 23:37:20,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-18 23:37:20,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 2433 transitions. [2019-12-18 23:37:20,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-12-18 23:37:20,297 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:20,298 INFO L411 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:20,501 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:20,502 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:20,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:20,502 INFO L82 PathProgramCache]: Analyzing trace with hash 655820014, now seen corresponding path program 25 times [2019-12-18 23:37:20,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:20,502 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883816418] [2019-12-18 23:37:20,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:21,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883816418] [2019-12-18 23:37:21,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435410615] [2019-12-18 23:37:21,212 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-12-18 23:37:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:21,310 INFO L264 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-18 23:37:21,312 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:21,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:21,352 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:21,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:21,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:21,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-12-18 23:37:21,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268570582] [2019-12-18 23:37:21,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-18 23:37:21,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:21,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-18 23:37:21,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 23:37:21,372 INFO L87 Difference]: Start difference. First operand 1148 states and 2433 transitions. Second operand 33 states. [2019-12-18 23:37:22,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:22,386 INFO L93 Difference]: Finished difference Result 1405 states and 3041 transitions. [2019-12-18 23:37:22,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-18 23:37:22,386 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 130 [2019-12-18 23:37:22,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:22,389 INFO L225 Difference]: With dead ends: 1405 [2019-12-18 23:37:22,390 INFO L226 Difference]: Without dead ends: 1168 [2019-12-18 23:37:22,392 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1154, Invalid=2752, Unknown=0, NotChecked=0, Total=3906 [2019-12-18 23:37:22,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2019-12-18 23:37:22,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 714. [2019-12-18 23:37:22,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 714 states. [2019-12-18 23:37:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1561 transitions. [2019-12-18 23:37:22,404 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1561 transitions. Word has length 130 [2019-12-18 23:37:22,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:22,404 INFO L462 AbstractCegarLoop]: Abstraction has 714 states and 1561 transitions. [2019-12-18 23:37:22,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-18 23:37:22,405 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1561 transitions. [2019-12-18 23:37:22,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-12-18 23:37:22,406 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:22,406 INFO L411 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:22,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:22,608 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:22,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:22,609 INFO L82 PathProgramCache]: Analyzing trace with hash -729680373, now seen corresponding path program 26 times [2019-12-18 23:37:22,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:22,609 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625505304] [2019-12-18 23:37:22,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:23,113 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625505304] [2019-12-18 23:37:23,113 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839354442] [2019-12-18 23:37:23,114 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:23,184 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:37:23,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:23,186 INFO L264 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-18 23:37:23,187 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:23,221 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:23,222 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:23,223 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:23,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:23,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-12-18 23:37:23,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098662205] [2019-12-18 23:37:23,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-18 23:37:23,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:23,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-18 23:37:23,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 23:37:23,236 INFO L87 Difference]: Start difference. First operand 714 states and 1561 transitions. Second operand 34 states. [2019-12-18 23:37:24,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:24,180 INFO L93 Difference]: Finished difference Result 1429 states and 3089 transitions. [2019-12-18 23:37:24,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-18 23:37:24,180 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 134 [2019-12-18 23:37:24,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:24,182 INFO L225 Difference]: With dead ends: 1429 [2019-12-18 23:37:24,183 INFO L226 Difference]: Without dead ends: 1240 [2019-12-18 23:37:24,184 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1230, Invalid=2930, Unknown=0, NotChecked=0, Total=4160 [2019-12-18 23:37:24,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2019-12-18 23:37:24,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1212. [2019-12-18 23:37:24,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1212 states. [2019-12-18 23:37:24,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 2561 transitions. [2019-12-18 23:37:24,197 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 2561 transitions. Word has length 134 [2019-12-18 23:37:24,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:24,198 INFO L462 AbstractCegarLoop]: Abstraction has 1212 states and 2561 transitions. [2019-12-18 23:37:24,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-18 23:37:24,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 2561 transitions. [2019-12-18 23:37:24,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-12-18 23:37:24,199 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:24,199 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:24,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:24,400 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:24,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:24,401 INFO L82 PathProgramCache]: Analyzing trace with hash -746556632, now seen corresponding path program 27 times [2019-12-18 23:37:24,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:24,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9470913] [2019-12-18 23:37:24,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:25,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9470913] [2019-12-18 23:37:25,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532388862] [2019-12-18 23:37:25,060 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-18 23:37:25,171 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-12-18 23:37:25,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:25,173 INFO L264 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-18 23:37:25,175 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:25,226 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:25,226 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:25,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:25,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:25,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-12-18 23:37:25,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924525192] [2019-12-18 23:37:25,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-18 23:37:25,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:25,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-18 23:37:25,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2019-12-18 23:37:25,252 INFO L87 Difference]: Start difference. First operand 1212 states and 2561 transitions. Second operand 35 states. [2019-12-18 23:37:26,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:26,766 INFO L93 Difference]: Finished difference Result 1469 states and 3169 transitions. [2019-12-18 23:37:26,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-18 23:37:26,767 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 138 [2019-12-18 23:37:26,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:26,770 INFO L225 Difference]: With dead ends: 1469 [2019-12-18 23:37:26,770 INFO L226 Difference]: Without dead ends: 1280 [2019-12-18 23:37:26,771 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1310, Invalid=3112, Unknown=0, NotChecked=0, Total=4422 [2019-12-18 23:37:26,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2019-12-18 23:37:26,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 770. [2019-12-18 23:37:26,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2019-12-18 23:37:26,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1673 transitions. [2019-12-18 23:37:26,785 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1673 transitions. Word has length 138 [2019-12-18 23:37:26,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:26,785 INFO L462 AbstractCegarLoop]: Abstraction has 770 states and 1673 transitions. [2019-12-18 23:37:26,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-18 23:37:26,786 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1673 transitions. [2019-12-18 23:37:26,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-12-18 23:37:26,787 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:26,788 INFO L411 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:26,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:26,992 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:26,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:26,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1356138683, now seen corresponding path program 28 times [2019-12-18 23:37:26,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:26,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426569610] [2019-12-18 23:37:26,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:27,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426569610] [2019-12-18 23:37:27,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062100464] [2019-12-18 23:37:27,483 INFO L92 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 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 [2019-12-18 23:37:27,553 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:37:27,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:27,555 INFO L264 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 37 conjunts are in the unsatisfiable core [2019-12-18 23:37:27,557 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:27,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:27,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:27,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:27,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:27,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-12-18 23:37:27,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420769190] [2019-12-18 23:37:27,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-18 23:37:27,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:27,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-18 23:37:27,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=964, Unknown=0, NotChecked=0, Total=1260 [2019-12-18 23:37:27,629 INFO L87 Difference]: Start difference. First operand 770 states and 1673 transitions. Second operand 36 states. [2019-12-18 23:37:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:28,813 INFO L93 Difference]: Finished difference Result 1623 states and 3526 transitions. [2019-12-18 23:37:28,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-18 23:37:28,813 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 142 [2019-12-18 23:37:28,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:28,816 INFO L225 Difference]: With dead ends: 1623 [2019-12-18 23:37:28,816 INFO L226 Difference]: Without dead ends: 1304 [2019-12-18 23:37:28,817 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1401, Invalid=3429, Unknown=0, NotChecked=0, Total=4830 [2019-12-18 23:37:28,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2019-12-18 23:37:28,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 1276. [2019-12-18 23:37:28,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1276 states. [2019-12-18 23:37:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 2689 transitions. [2019-12-18 23:37:28,837 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 2689 transitions. Word has length 142 [2019-12-18 23:37:28,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:28,837 INFO L462 AbstractCegarLoop]: Abstraction has 1276 states and 2689 transitions. [2019-12-18 23:37:28,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-18 23:37:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 2689 transitions. [2019-12-18 23:37:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-12-18 23:37:28,840 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:28,840 INFO L411 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:29,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:29,044 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:29,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:29,044 INFO L82 PathProgramCache]: Analyzing trace with hash 102565730, now seen corresponding path program 29 times [2019-12-18 23:37:29,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:29,045 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234832014] [2019-12-18 23:37:29,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:29,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234832014] [2019-12-18 23:37:29,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407799073] [2019-12-18 23:37:29,614 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:29,697 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-12-18 23:37:29,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:29,699 INFO L264 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-18 23:37:29,700 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:29,741 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:29,742 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:29,743 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:29,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:29,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-12-18 23:37:29,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143231791] [2019-12-18 23:37:29,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-18 23:37:29,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:29,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-18 23:37:29,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2019-12-18 23:37:29,788 INFO L87 Difference]: Start difference. First operand 1276 states and 2689 transitions. Second operand 37 states. [2019-12-18 23:37:30,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:30,972 INFO L93 Difference]: Finished difference Result 1659 states and 3598 transitions. [2019-12-18 23:37:30,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-18 23:37:30,972 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 146 [2019-12-18 23:37:30,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:30,976 INFO L225 Difference]: With dead ends: 1659 [2019-12-18 23:37:30,976 INFO L226 Difference]: Without dead ends: 1364 [2019-12-18 23:37:30,978 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1486, Invalid=3626, Unknown=0, NotChecked=0, Total=5112 [2019-12-18 23:37:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2019-12-18 23:37:30,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1308. [2019-12-18 23:37:30,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1308 states. [2019-12-18 23:37:30,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 2753 transitions. [2019-12-18 23:37:30,999 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 2753 transitions. Word has length 146 [2019-12-18 23:37:30,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:30,999 INFO L462 AbstractCegarLoop]: Abstraction has 1308 states and 2753 transitions. [2019-12-18 23:37:30,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-18 23:37:30,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 2753 transitions. [2019-12-18 23:37:31,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-12-18 23:37:31,002 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:31,002 INFO L411 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:31,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:31,206 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:31,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:31,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1396433281, now seen corresponding path program 30 times [2019-12-18 23:37:31,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:31,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600990794] [2019-12-18 23:37:31,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:32,059 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:32,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600990794] [2019-12-18 23:37:32,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436993411] [2019-12-18 23:37:32,060 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-18 23:37:32,214 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-12-18 23:37:32,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:32,217 INFO L264 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 39 conjunts are in the unsatisfiable core [2019-12-18 23:37:32,220 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:32,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:32,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:32,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:32,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:32,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-12-18 23:37:32,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942343255] [2019-12-18 23:37:32,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-18 23:37:32,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:32,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-18 23:37:32,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2019-12-18 23:37:32,310 INFO L87 Difference]: Start difference. First operand 1308 states and 2753 transitions. Second operand 38 states. [2019-12-18 23:37:33,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:33,445 INFO L93 Difference]: Finished difference Result 1565 states and 3361 transitions. [2019-12-18 23:37:33,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-18 23:37:33,445 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 150 [2019-12-18 23:37:33,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:33,451 INFO L225 Difference]: With dead ends: 1565 [2019-12-18 23:37:33,451 INFO L226 Difference]: Without dead ends: 1352 [2019-12-18 23:37:33,452 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1562, Invalid=3694, Unknown=0, NotChecked=0, Total=5256 [2019-12-18 23:37:33,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2019-12-18 23:37:33,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1340. [2019-12-18 23:37:33,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1340 states. [2019-12-18 23:37:33,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 2817 transitions. [2019-12-18 23:37:33,473 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 2817 transitions. Word has length 150 [2019-12-18 23:37:33,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:33,473 INFO L462 AbstractCegarLoop]: Abstraction has 1340 states and 2817 transitions. [2019-12-18 23:37:33,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-18 23:37:33,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 2817 transitions. [2019-12-18 23:37:33,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-12-18 23:37:33,476 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:33,476 INFO L411 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:33,680 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:33,680 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:33,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:33,681 INFO L82 PathProgramCache]: Analyzing trace with hash 73843100, now seen corresponding path program 31 times [2019-12-18 23:37:33,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:33,681 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101338463] [2019-12-18 23:37:33,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:34,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101338463] [2019-12-18 23:37:34,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509488779] [2019-12-18 23:37:34,335 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-12-18 23:37:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:34,415 INFO L264 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-18 23:37:34,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:34,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:34,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:34,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:34,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:34,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-12-18 23:37:34,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572579311] [2019-12-18 23:37:34,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-12-18 23:37:34,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:34,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-12-18 23:37:34,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1133, Unknown=0, NotChecked=0, Total=1482 [2019-12-18 23:37:34,502 INFO L87 Difference]: Start difference. First operand 1340 states and 2817 transitions. Second operand 39 states. [2019-12-18 23:37:35,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:35,846 INFO L93 Difference]: Finished difference Result 1695 states and 3670 transitions. [2019-12-18 23:37:35,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-18 23:37:35,846 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 154 [2019-12-18 23:37:35,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:35,848 INFO L225 Difference]: With dead ends: 1695 [2019-12-18 23:37:35,848 INFO L226 Difference]: Without dead ends: 1376 [2019-12-18 23:37:35,849 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1662, Invalid=4038, Unknown=0, NotChecked=0, Total=5700 [2019-12-18 23:37:35,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2019-12-18 23:37:35,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 810. [2019-12-18 23:37:35,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 810 states. [2019-12-18 23:37:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1753 transitions. [2019-12-18 23:37:35,864 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1753 transitions. Word has length 154 [2019-12-18 23:37:35,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:35,864 INFO L462 AbstractCegarLoop]: Abstraction has 810 states and 1753 transitions. [2019-12-18 23:37:35,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-12-18 23:37:35,864 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1753 transitions. [2019-12-18 23:37:35,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-12-18 23:37:35,866 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:35,866 INFO L411 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:36,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:36,070 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:36,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:36,070 INFO L82 PathProgramCache]: Analyzing trace with hash 96955321, now seen corresponding path program 32 times [2019-12-18 23:37:36,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:36,071 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209944203] [2019-12-18 23:37:36,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:36,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209944203] [2019-12-18 23:37:36,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406781825] [2019-12-18 23:37:36,606 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:36,696 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:37:36,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:36,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-18 23:37:36,700 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:36,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:36,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:36,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:36,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:36,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-12-18 23:37:36,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169568184] [2019-12-18 23:37:36,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-18 23:37:36,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:36,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-18 23:37:36,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2019-12-18 23:37:36,757 INFO L87 Difference]: Start difference. First operand 810 states and 1753 transitions. Second operand 40 states. [2019-12-18 23:37:38,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:38,000 INFO L93 Difference]: Finished difference Result 1621 states and 3473 transitions. [2019-12-18 23:37:38,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-18 23:37:38,001 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 158 [2019-12-18 23:37:38,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:38,002 INFO L225 Difference]: With dead ends: 1621 [2019-12-18 23:37:38,002 INFO L226 Difference]: Without dead ends: 1432 [2019-12-18 23:37:38,003 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1743, Invalid=4109, Unknown=0, NotChecked=0, Total=5852 [2019-12-18 23:37:38,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2019-12-18 23:37:38,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1404. [2019-12-18 23:37:38,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1404 states. [2019-12-18 23:37:38,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 2945 transitions. [2019-12-18 23:37:38,023 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 2945 transitions. Word has length 158 [2019-12-18 23:37:38,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:38,024 INFO L462 AbstractCegarLoop]: Abstraction has 1404 states and 2945 transitions. [2019-12-18 23:37:38,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-18 23:37:38,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 2945 transitions. [2019-12-18 23:37:38,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-12-18 23:37:38,025 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:38,026 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:38,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:38,226 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:38,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:38,227 INFO L82 PathProgramCache]: Analyzing trace with hash -103308842, now seen corresponding path program 33 times [2019-12-18 23:37:38,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:38,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591911791] [2019-12-18 23:37:38,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:38,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591911791] [2019-12-18 23:37:38,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615653068] [2019-12-18 23:37:38,833 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-18 23:37:38,931 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-12-18 23:37:38,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:38,933 INFO L264 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-18 23:37:38,935 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:38,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:38,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:38,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:38,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:38,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-12-18 23:37:38,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667441535] [2019-12-18 23:37:38,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-12-18 23:37:39,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:39,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-12-18 23:37:39,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1253, Unknown=0, NotChecked=0, Total=1640 [2019-12-18 23:37:39,000 INFO L87 Difference]: Start difference. First operand 1404 states and 2945 transitions. Second operand 41 states. [2019-12-18 23:37:40,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:40,390 INFO L93 Difference]: Finished difference Result 1661 states and 3553 transitions. [2019-12-18 23:37:40,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-18 23:37:40,391 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 162 [2019-12-18 23:37:40,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:40,393 INFO L225 Difference]: With dead ends: 1661 [2019-12-18 23:37:40,393 INFO L226 Difference]: Without dead ends: 1424 [2019-12-18 23:37:40,394 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1838, Invalid=4324, Unknown=0, NotChecked=0, Total=6162 [2019-12-18 23:37:40,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2019-12-18 23:37:40,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 842. [2019-12-18 23:37:40,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2019-12-18 23:37:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1817 transitions. [2019-12-18 23:37:40,411 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1817 transitions. Word has length 162 [2019-12-18 23:37:40,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:40,411 INFO L462 AbstractCegarLoop]: Abstraction has 842 states and 1817 transitions. [2019-12-18 23:37:40,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-12-18 23:37:40,412 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1817 transitions. [2019-12-18 23:37:40,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-12-18 23:37:40,413 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:40,413 INFO L411 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:40,617 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:40,618 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:40,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:40,618 INFO L82 PathProgramCache]: Analyzing trace with hash -659628301, now seen corresponding path program 34 times [2019-12-18 23:37:40,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:40,619 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467410525] [2019-12-18 23:37:40,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:41,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467410525] [2019-12-18 23:37:41,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870993491] [2019-12-18 23:37:41,246 INFO L92 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 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 [2019-12-18 23:37:41,333 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:37:41,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:41,334 INFO L264 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-18 23:37:41,336 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:41,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:41,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:41,400 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:41,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:41,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-12-18 23:37:41,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131211604] [2019-12-18 23:37:41,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-12-18 23:37:41,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:41,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-12-18 23:37:41,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1315, Unknown=0, NotChecked=0, Total=1722 [2019-12-18 23:37:41,428 INFO L87 Difference]: Start difference. First operand 842 states and 1817 transitions. Second operand 42 states. [2019-12-18 23:37:42,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:42,774 INFO L93 Difference]: Finished difference Result 1685 states and 3601 transitions. [2019-12-18 23:37:42,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-18 23:37:42,775 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 166 [2019-12-18 23:37:42,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:42,776 INFO L225 Difference]: With dead ends: 1685 [2019-12-18 23:37:42,776 INFO L226 Difference]: Without dead ends: 1496 [2019-12-18 23:37:42,777 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1934, Invalid=4546, Unknown=0, NotChecked=0, Total=6480 [2019-12-18 23:37:42,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2019-12-18 23:37:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1468. [2019-12-18 23:37:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1468 states. [2019-12-18 23:37:42,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 3073 transitions. [2019-12-18 23:37:42,795 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 3073 transitions. Word has length 166 [2019-12-18 23:37:42,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:42,796 INFO L462 AbstractCegarLoop]: Abstraction has 1468 states and 3073 transitions. [2019-12-18 23:37:42,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-12-18 23:37:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 3073 transitions. [2019-12-18 23:37:42,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-12-18 23:37:42,798 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:42,798 INFO L411 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:42,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:42,998 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:42,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:42,999 INFO L82 PathProgramCache]: Analyzing trace with hash -135682032, now seen corresponding path program 35 times [2019-12-18 23:37:42,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:43,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304281380] [2019-12-18 23:37:43,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:43,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304281380] [2019-12-18 23:37:43,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648881419] [2019-12-18 23:37:43,710 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:43,807 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-12-18 23:37:43,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:43,809 INFO L264 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-18 23:37:43,810 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:43,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:43,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:43,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:43,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:43,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-12-18 23:37:43,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112385498] [2019-12-18 23:37:43,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-18 23:37:43,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:43,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-18 23:37:43,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2019-12-18 23:37:43,873 INFO L87 Difference]: Start difference. First operand 1468 states and 3073 transitions. Second operand 43 states. [2019-12-18 23:37:45,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:45,324 INFO L93 Difference]: Finished difference Result 1725 states and 3681 transitions. [2019-12-18 23:37:45,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-12-18 23:37:45,324 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 170 [2019-12-18 23:37:45,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:45,330 INFO L225 Difference]: With dead ends: 1725 [2019-12-18 23:37:45,330 INFO L226 Difference]: Without dead ends: 1536 [2019-12-18 23:37:45,332 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2034, Invalid=4772, Unknown=0, NotChecked=0, Total=6806 [2019-12-18 23:37:45,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2019-12-18 23:37:45,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 898. [2019-12-18 23:37:45,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2019-12-18 23:37:45,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1929 transitions. [2019-12-18 23:37:45,372 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1929 transitions. Word has length 170 [2019-12-18 23:37:45,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:45,373 INFO L462 AbstractCegarLoop]: Abstraction has 898 states and 1929 transitions. [2019-12-18 23:37:45,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-18 23:37:45,373 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1929 transitions. [2019-12-18 23:37:45,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-12-18 23:37:45,375 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:45,375 INFO L411 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:45,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:45,579 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:45,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:45,580 INFO L82 PathProgramCache]: Analyzing trace with hash 703887405, now seen corresponding path program 36 times [2019-12-18 23:37:45,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:45,580 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316972058] [2019-12-18 23:37:45,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:46,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316972058] [2019-12-18 23:37:46,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801371636] [2019-12-18 23:37:46,394 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-18 23:37:46,492 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-12-18 23:37:46,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:46,494 INFO L264 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 45 conjunts are in the unsatisfiable core [2019-12-18 23:37:46,499 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:46,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:46,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:46,536 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:46,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:46,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2019-12-18 23:37:46,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051233340] [2019-12-18 23:37:46,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-12-18 23:37:46,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:46,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-12-18 23:37:46,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2019-12-18 23:37:46,558 INFO L87 Difference]: Start difference. First operand 898 states and 1929 transitions. Second operand 44 states. [2019-12-18 23:37:48,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:48,034 INFO L93 Difference]: Finished difference Result 1895 states and 4070 transitions. [2019-12-18 23:37:48,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-12-18 23:37:48,035 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 174 [2019-12-18 23:37:48,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:48,037 INFO L225 Difference]: With dead ends: 1895 [2019-12-18 23:37:48,037 INFO L226 Difference]: Without dead ends: 1600 [2019-12-18 23:37:48,037 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2145, Invalid=5165, Unknown=0, NotChecked=0, Total=7310 [2019-12-18 23:37:48,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2019-12-18 23:37:48,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 917. [2019-12-18 23:37:48,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 917 states. [2019-12-18 23:37:48,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1967 transitions. [2019-12-18 23:37:48,051 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1967 transitions. Word has length 174 [2019-12-18 23:37:48,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:48,051 INFO L462 AbstractCegarLoop]: Abstraction has 917 states and 1967 transitions. [2019-12-18 23:37:48,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-12-18 23:37:48,051 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1967 transitions. [2019-12-18 23:37:48,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-12-18 23:37:48,053 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:48,053 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:48,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:48,254 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:48,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:48,255 INFO L82 PathProgramCache]: Analyzing trace with hash -166276022, now seen corresponding path program 37 times [2019-12-18 23:37:48,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:48,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428942970] [2019-12-18 23:37:48,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:49,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428942970] [2019-12-18 23:37:49,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175598454] [2019-12-18 23:37:49,224 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-12-18 23:37:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:49,308 INFO L264 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 46 conjunts are in the unsatisfiable core [2019-12-18 23:37:49,310 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:49,340 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:49,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:49,342 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:49,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:49,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-12-18 23:37:49,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763877297] [2019-12-18 23:37:49,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-12-18 23:37:49,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:49,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-12-18 23:37:49,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=1511, Unknown=0, NotChecked=0, Total=1980 [2019-12-18 23:37:49,364 INFO L87 Difference]: Start difference. First operand 917 states and 1967 transitions. Second operand 45 states. [2019-12-18 23:37:50,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:50,978 INFO L93 Difference]: Finished difference Result 1813 states and 3857 transitions. [2019-12-18 23:37:50,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-12-18 23:37:50,978 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 178 [2019-12-18 23:37:50,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:50,980 INFO L225 Difference]: With dead ends: 1813 [2019-12-18 23:37:50,981 INFO L226 Difference]: Without dead ends: 1576 [2019-12-18 23:37:50,982 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2244, Invalid=5238, Unknown=0, NotChecked=0, Total=7482 [2019-12-18 23:37:50,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2019-12-18 23:37:50,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1548. [2019-12-18 23:37:50,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1548 states. [2019-12-18 23:37:51,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 3233 transitions. [2019-12-18 23:37:51,001 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 3233 transitions. Word has length 178 [2019-12-18 23:37:51,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:51,001 INFO L462 AbstractCegarLoop]: Abstraction has 1548 states and 3233 transitions. [2019-12-18 23:37:51,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-12-18 23:37:51,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 3233 transitions. [2019-12-18 23:37:51,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-12-18 23:37:51,004 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:51,004 INFO L411 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:51,207 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:51,208 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:51,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:51,208 INFO L82 PathProgramCache]: Analyzing trace with hash -468568217, now seen corresponding path program 38 times [2019-12-18 23:37:51,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:51,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297352747] [2019-12-18 23:37:51,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1425 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:51,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297352747] [2019-12-18 23:37:51,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320073510] [2019-12-18 23:37:51,980 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2019-12-18 23:37:52,069 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:37:52,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:52,071 INFO L264 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-18 23:37:52,074 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1483 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:52,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 23:37:52,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [43] total 45 [2019-12-18 23:37:52,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832347429] [2019-12-18 23:37:52,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-18 23:37:52,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:52,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-18 23:37:52,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=1491, Unknown=0, NotChecked=0, Total=1980 [2019-12-18 23:37:52,134 INFO L87 Difference]: Start difference. First operand 1548 states and 3233 transitions. Second operand 43 states. [2019-12-18 23:37:53,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:53,166 INFO L93 Difference]: Finished difference Result 13632 states and 27055 transitions. [2019-12-18 23:37:53,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-12-18 23:37:53,166 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 182 [2019-12-18 23:37:53,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:53,168 INFO L225 Difference]: With dead ends: 13632 [2019-12-18 23:37:53,168 INFO L226 Difference]: Without dead ends: 1536 [2019-12-18 23:37:53,169 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2209, Invalid=4931, Unknown=0, NotChecked=0, Total=7140 [2019-12-18 23:37:53,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2019-12-18 23:37:53,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1520. [2019-12-18 23:37:53,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1520 states. [2019-12-18 23:37:53,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 2986 transitions. [2019-12-18 23:37:53,194 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 2986 transitions. Word has length 182 [2019-12-18 23:37:53,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:53,194 INFO L462 AbstractCegarLoop]: Abstraction has 1520 states and 2986 transitions. [2019-12-18 23:37:53,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-18 23:37:53,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 2986 transitions. [2019-12-18 23:37:53,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-12-18 23:37:53,197 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:53,197 INFO L411 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:53,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:53,401 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:53,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:53,401 INFO L82 PathProgramCache]: Analyzing trace with hash 2016800993, now seen corresponding path program 39 times [2019-12-18 23:37:53,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:53,402 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117193716] [2019-12-18 23:37:53,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1352 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:54,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117193716] [2019-12-18 23:37:54,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382033331] [2019-12-18 23:37:54,304 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-18 23:37:54,404 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2019-12-18 23:37:54,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:54,407 INFO L264 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-18 23:37:54,410 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1483 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:54,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 23:37:54,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [43] total 45 [2019-12-18 23:37:54,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820288869] [2019-12-18 23:37:54,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-18 23:37:54,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:54,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-18 23:37:54,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=1491, Unknown=0, NotChecked=0, Total=1980 [2019-12-18 23:37:54,501 INFO L87 Difference]: Start difference. First operand 1520 states and 2986 transitions. Second operand 43 states. [2019-12-18 23:37:55,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:55,729 INFO L93 Difference]: Finished difference Result 13648 states and 25283 transitions. [2019-12-18 23:37:55,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-12-18 23:37:55,729 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 182 [2019-12-18 23:37:55,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:55,730 INFO L225 Difference]: With dead ends: 13648 [2019-12-18 23:37:55,730 INFO L226 Difference]: Without dead ends: 0 [2019-12-18 23:37:55,735 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2209, Invalid=4931, Unknown=0, NotChecked=0, Total=7140 [2019-12-18 23:37:55,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-18 23:37:55,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-18 23:37:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-18 23:37:55,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-18 23:37:55,736 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 182 [2019-12-18 23:37:55,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:55,737 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-18 23:37:55,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-18 23:37:55,737 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-18 23:37:55,737 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-18 23:37:55,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:55,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 11:37:55 BasicIcfg [2019-12-18 23:37:55,947 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 23:37:55,949 INFO L168 Benchmark]: Toolchain (without parser) took 67143.51 ms. Allocated memory was 143.7 MB in the beginning and 635.4 MB in the end (delta: 491.8 MB). Free memory was 98.9 MB in the beginning and 420.5 MB in the end (delta: -321.6 MB). Peak memory consumption was 170.2 MB. Max. memory is 7.1 GB. [2019-12-18 23:37:55,950 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 143.7 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-12-18 23:37:55,950 INFO L168 Benchmark]: CACSL2BoogieTranslator took 731.28 ms. Allocated memory was 143.7 MB in the beginning and 200.3 MB in the end (delta: 56.6 MB). Free memory was 98.5 MB in the beginning and 158.8 MB in the end (delta: -60.3 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2019-12-18 23:37:55,951 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.51 ms. Allocated memory is still 200.3 MB. Free memory was 158.8 MB in the beginning and 156.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-12-18 23:37:55,951 INFO L168 Benchmark]: Boogie Preprocessor took 40.25 ms. Allocated memory is still 200.3 MB. Free memory was 156.7 MB in the beginning and 155.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2019-12-18 23:37:55,952 INFO L168 Benchmark]: RCFGBuilder took 424.19 ms. Allocated memory is still 200.3 MB. Free memory was 155.3 MB in the beginning and 135.6 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2019-12-18 23:37:55,952 INFO L168 Benchmark]: TraceAbstraction took 65884.06 ms. Allocated memory was 200.3 MB in the beginning and 635.4 MB in the end (delta: 435.2 MB). Free memory was 134.9 MB in the beginning and 420.5 MB in the end (delta: -285.6 MB). Peak memory consumption was 149.5 MB. Max. memory is 7.1 GB. [2019-12-18 23:37:55,954 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 143.7 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 731.28 ms. Allocated memory was 143.7 MB in the beginning and 200.3 MB in the end (delta: 56.6 MB). Free memory was 98.5 MB in the beginning and 158.8 MB in the end (delta: -60.3 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 58.51 ms. Allocated memory is still 200.3 MB. Free memory was 158.8 MB in the beginning and 156.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 40.25 ms. Allocated memory is still 200.3 MB. Free memory was 156.7 MB in the beginning and 155.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 424.19 ms. Allocated memory is still 200.3 MB. Free memory was 155.3 MB in the beginning and 135.6 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 65884.06 ms. Allocated memory was 200.3 MB in the beginning and 635.4 MB in the end (delta: 435.2 MB). Free memory was 134.9 MB in the beginning and 420.5 MB in the end (delta: -285.6 MB). Peak memory consumption was 149.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Result: SAFE, OverallTime: 65.7s, OverallIterations: 46, TraceHistogramMax: 21, AutomataDifference: 32.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 3316 SDtfs, 20626 SDslu, 31696 SDs, 0 SdLazy, 6194 SolverSat, 3451 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6437 GetRequests, 4394 SyntacticMatches, 0 SemanticMatches, 2043 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22770 ImplicationChecksByTransitivity, 38.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1548occurred in iteration=44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 46 MinimizatonAttempts, 7509 StatesRemovedByMinimization, 43 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 18.6s InterpolantComputationTime, 8810 NumberOfCodeBlocks, 8810 NumberOfCodeBlocksAsserted, 308 NumberOfCheckSat, 8723 ConstructedInterpolants, 0 QuantifiedInterpolants, 3234363 SizeOfPredicates, 1019 NumberOfNonLiveVariables, 9881 ConjunctsInSsa, 1138 ConjunctsInUnsatCore, 87 InterpolantComputations, 7 PerfectInterpolantSequences, 5743/42528 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...