/usr/bin/java -Xmx16000000000 -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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 13:12:51,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 13:12:51,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 13:12:51,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 13:12:51,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 13:12:51,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 13:12:51,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 13:12:51,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 13:12:51,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 13:12:51,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 13:12:51,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 13:12:51,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 13:12:51,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 13:12:51,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 13:12:51,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 13:12:51,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 13:12:51,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 13:12:51,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 13:12:51,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 13:12:51,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 13:12:51,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 13:12:51,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 13:12:51,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 13:12:51,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 13:12:51,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-11 13:12:51,580 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-11 13:12:51,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-11 13:12:51,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-11 13:12:51,582 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-11 13:12:51,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-11 13:12:51,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 13:12:51,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 13:12:51,588 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 13:12:51,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 13:12:51,590 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 13:12:51,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 13:12:51,591 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 13:12:51,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 13:12:51,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 13:12:51,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 13:12:51,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 13:12:51,594 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-11 13:12:51,641 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 13:12:51,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 13:12:51,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 13:12:51,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 13:12:51,643 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 13:12:51,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 13:12:51,648 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 13:12:51,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 13:12:51,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 13:12:51,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 13:12:51,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 13:12:51,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 13:12:51,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 13:12:51,650 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 13:12:51,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 13:12:51,650 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 13:12:51,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 13:12:51,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 13:12:51,651 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 13:12:51,651 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 13:12:51,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 13:12:51,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 13:12:51,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 13:12:51,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 13:12:51,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 13:12:51,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 13:12:51,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 13:12:51,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-11 13:12:51,656 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-11 13:12:51,656 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 13:12:51,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 13:12:52,009 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 13:12:52,014 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 13:12:52,016 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 13:12:52,017 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 13:12:52,018 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-10-11 13:12:52,074 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bc9eeffa/0f162618b0a1460b8a480c0217803385/FLAG2a719e46b [2020-10-11 13:12:52,571 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 13:12:52,572 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2020-10-11 13:12:52,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bc9eeffa/0f162618b0a1460b8a480c0217803385/FLAG2a719e46b [2020-10-11 13:12:52,919 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bc9eeffa/0f162618b0a1460b8a480c0217803385 [2020-10-11 13:12:52,929 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 13:12:52,931 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 13:12:52,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 13:12:52,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 13:12:52,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 13:12:52,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:12:52" (1/1) ... [2020-10-11 13:12:52,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a9bb26f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:12:52, skipping insertion in model container [2020-10-11 13:12:52,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:12:52" (1/1) ... [2020-10-11 13:12:52,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 13:12:53,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 13:12:53,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 13:12:53,500 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 13:12:53,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 13:12:53,672 INFO L208 MainTranslator]: Completed translation [2020-10-11 13:12:53,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:12:53 WrapperNode [2020-10-11 13:12:53,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 13:12:53,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 13:12:53,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 13:12:53,676 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 13:12:53,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:12:53" (1/1) ... [2020-10-11 13:12:53,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:12:53" (1/1) ... [2020-10-11 13:12:53,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 13:12:53,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 13:12:53,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 13:12:53,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 13:12:53,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:12:53" (1/1) ... [2020-10-11 13:12:53,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:12:53" (1/1) ... [2020-10-11 13:12:53,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:12:53" (1/1) ... [2020-10-11 13:12:53,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:12:53" (1/1) ... [2020-10-11 13:12:53,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:12:53" (1/1) ... [2020-10-11 13:12:53,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:12:53" (1/1) ... [2020-10-11 13:12:53,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:12:53" (1/1) ... [2020-10-11 13:12:53,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 13:12:53,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 13:12:53,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 13:12:53,762 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 13:12:53,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:12:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 13:12:53,842 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-11 13:12:53,843 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-11 13:12:53,843 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-11 13:12:53,843 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-11 13:12:53,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 13:12:53,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-11 13:12:53,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 13:12:53,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 13:12:53,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-11 13:12:53,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 13:12:53,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 13:12:53,846 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 13:12:54,122 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 13:12:54,123 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-11 13:12:54,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:12:54 BoogieIcfgContainer [2020-10-11 13:12:54,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 13:12:54,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 13:12:54,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 13:12:54,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 13:12:54,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 01:12:52" (1/3) ... [2020-10-11 13:12:54,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@575fec42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:12:54, skipping insertion in model container [2020-10-11 13:12:54,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:12:53" (2/3) ... [2020-10-11 13:12:54,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@575fec42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:12:54, skipping insertion in model container [2020-10-11 13:12:54,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:12:54" (3/3) ... [2020-10-11 13:12:54,135 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-10-11 13:12:54,150 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-11 13:12:54,150 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 13:12:54,158 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 13:12:54,159 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 13:12:54,198 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,199 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,199 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,200 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,200 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,200 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,201 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,203 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,204 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,204 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,204 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,205 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,205 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,205 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,206 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,206 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,206 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,206 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,207 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,207 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,207 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,208 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,208 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,208 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,209 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,209 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,209 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,209 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,214 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,214 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,214 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,215 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,215 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,215 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,222 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,223 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,223 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,223 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,223 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,224 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:12:54,243 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-11 13:12:54,268 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 13:12:54,268 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-11 13:12:54,268 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 13:12:54,268 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 13:12:54,268 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 13:12:54,268 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 13:12:54,269 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 13:12:54,269 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 13:12:54,278 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-11 13:12:54,280 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-11 13:12:54,282 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-11 13:12:54,284 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-11 13:12:54,323 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-11 13:12:54,324 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 13:12:54,329 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-11 13:12:54,331 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-11 13:12:55,586 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-11 13:12:55,587 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-11 13:12:55,593 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-11 13:12:55,605 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-11 13:12:55,607 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-11 13:12:55,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-11 13:12:55,614 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:12:55,614 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-11 13:12:55,615 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:12:55,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:12:55,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-11 13:12:55,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:12:55,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99857028] [2020-10-11 13:12:55,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:12:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:12:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:12:55,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99857028] [2020-10-11 13:12:55,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:12:55,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 13:12:55,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017838803] [2020-10-11 13:12:55,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 13:12:55,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:12:55,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 13:12:55,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-11 13:12:55,856 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-11 13:12:55,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:12:55,926 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-11 13:12:55,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-11 13:12:55,928 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-11 13:12:55,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:12:55,940 INFO L225 Difference]: With dead ends: 75 [2020-10-11 13:12:55,940 INFO L226 Difference]: Without dead ends: 42 [2020-10-11 13:12:55,942 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 13:12:55,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-11 13:12:55,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-11 13:12:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 13:12:55,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-11 13:12:55,982 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-11 13:12:55,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:12:55,982 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-11 13:12:55,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 13:12:55,983 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-11 13:12:55,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-11 13:12:55,984 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:12:55,984 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:12:55,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 13:12:55,984 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:12:55,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:12:55,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-11 13:12:55,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:12:55,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774916489] [2020-10-11 13:12:55,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:12:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:12:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:12:56,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774916489] [2020-10-11 13:12:56,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:12:56,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 13:12:56,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163924596] [2020-10-11 13:12:56,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 13:12:56,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:12:56,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 13:12:56,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 13:12:56,074 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-11 13:12:56,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:12:56,104 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-11 13:12:56,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 13:12:56,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-11 13:12:56,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:12:56,106 INFO L225 Difference]: With dead ends: 56 [2020-10-11 13:12:56,106 INFO L226 Difference]: Without dead ends: 50 [2020-10-11 13:12:56,107 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-11 13:12:56,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-11 13:12:56,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-11 13:12:56,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 13:12:56,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-11 13:12:56,114 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-11 13:12:56,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:12:56,115 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-11 13:12:56,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 13:12:56,116 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-11 13:12:56,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 13:12:56,117 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:12:56,117 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:12:56,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 13:12:56,117 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:12:56,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:12:56,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-11 13:12:56,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:12:56,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984120275] [2020-10-11 13:12:56,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:12:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:12:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:12:56,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984120275] [2020-10-11 13:12:56,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:12:56,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 13:12:56,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462362997] [2020-10-11 13:12:56,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 13:12:56,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:12:56,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 13:12:56,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-11 13:12:56,195 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-11 13:12:56,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:12:56,268 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-11 13:12:56,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 13:12:56,268 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 13:12:56,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:12:56,270 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:12:56,270 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 13:12:56,271 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:12:56,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 13:12:56,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-11 13:12:56,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:12:56,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-11 13:12:56,280 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-11 13:12:56,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:12:56,281 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-11 13:12:56,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 13:12:56,281 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-11 13:12:56,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 13:12:56,282 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:12:56,282 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:12:56,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-11 13:12:56,283 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:12:56,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:12:56,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-11 13:12:56,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:12:56,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991523009] [2020-10-11 13:12:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:12:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:12:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:12:56,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991523009] [2020-10-11 13:12:56,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:12:56,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 13:12:56,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43012156] [2020-10-11 13:12:56,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 13:12:56,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:12:56,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 13:12:56,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-11 13:12:56,366 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-11 13:12:56,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:12:56,434 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-11 13:12:56,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 13:12:56,435 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 13:12:56,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:12:56,436 INFO L225 Difference]: With dead ends: 54 [2020-10-11 13:12:56,436 INFO L226 Difference]: Without dead ends: 43 [2020-10-11 13:12:56,436 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:12:56,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-11 13:12:56,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-11 13:12:56,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-11 13:12:56,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-11 13:12:56,442 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-11 13:12:56,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:12:56,442 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-11 13:12:56,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 13:12:56,443 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-11 13:12:56,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 13:12:56,444 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:12:56,444 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:12:56,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-11 13:12:56,444 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:12:56,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:12:56,445 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-11 13:12:56,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:12:56,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026230375] [2020-10-11 13:12:56,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:12:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:12:56,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:12:56,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026230375] [2020-10-11 13:12:56,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:12:56,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 13:12:56,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654992976] [2020-10-11 13:12:56,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 13:12:56,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:12:56,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 13:12:56,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-11 13:12:56,521 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-11 13:12:56,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:12:56,586 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-11 13:12:56,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 13:12:56,587 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 13:12:56,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:12:56,588 INFO L225 Difference]: With dead ends: 57 [2020-10-11 13:12:56,588 INFO L226 Difference]: Without dead ends: 51 [2020-10-11 13:12:56,589 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:12:56,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-11 13:12:56,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-11 13:12:56,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-11 13:12:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-11 13:12:56,594 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-11 13:12:56,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:12:56,594 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-11 13:12:56,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 13:12:56,594 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-11 13:12:56,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:12:56,595 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:12:56,595 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:12:56,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-11 13:12:56,596 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:12:56,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:12:56,596 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-11 13:12:56,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:12:56,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100474314] [2020-10-11 13:12:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:12:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:12:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:12:56,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100474314] [2020-10-11 13:12:56,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458628490] [2020-10-11 13:12:56,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:12:56,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:12:56,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:12:56,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:12:56,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:12:56,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:12:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:12:56,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:12:56,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-11 13:12:56,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135135781] [2020-10-11 13:12:56,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:12:56,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:12:56,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:12:56,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:12:56,772 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-11 13:12:56,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:12:56,898 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-11 13:12:56,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 13:12:56,899 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-11 13:12:56,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:12:56,901 INFO L225 Difference]: With dead ends: 48 [2020-10-11 13:12:56,901 INFO L226 Difference]: Without dead ends: 43 [2020-10-11 13:12:56,902 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:12:56,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-11 13:12:56,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-11 13:12:56,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-11 13:12:56,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-11 13:12:56,907 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-11 13:12:56,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:12:56,907 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-11 13:12:56,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:12:56,907 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-11 13:12:56,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:12:56,908 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:12:56,908 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:12:57,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-11 13:12:57,109 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:12:57,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:12:57,110 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-11 13:12:57,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:12:57,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763549539] [2020-10-11 13:12:57,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:12:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:12:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:12:57,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763549539] [2020-10-11 13:12:57,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521971892] [2020-10-11 13:12:57,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:12:57,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:12:57,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:12:57,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:12:57,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:12:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:12:57,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:12:57,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-11 13:12:57,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892086011] [2020-10-11 13:12:57,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 13:12:57,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:12:57,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 13:12:57,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-11 13:12:57,236 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-11 13:12:57,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:12:57,303 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-11 13:12:57,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 13:12:57,304 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-11 13:12:57,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:12:57,305 INFO L225 Difference]: With dead ends: 54 [2020-10-11 13:12:57,305 INFO L226 Difference]: Without dead ends: 48 [2020-10-11 13:12:57,305 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:12:57,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-11 13:12:57,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-11 13:12:57,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 13:12:57,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-11 13:12:57,311 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-11 13:12:57,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:12:57,311 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-11 13:12:57,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 13:12:57,311 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-11 13:12:57,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:12:57,312 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:12:57,312 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:12:57,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:12:57,523 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:12:57,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:12:57,524 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-11 13:12:57,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:12:57,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544950155] [2020-10-11 13:12:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:12:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:12:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:12:57,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544950155] [2020-10-11 13:12:57,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181483889] [2020-10-11 13:12:57,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:12:57,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 13:12:57,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:12:57,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:12:57,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:12:57,699 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:12:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:12:57,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:12:57,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-11 13:12:57,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986339921] [2020-10-11 13:12:57,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:12:57,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:12:57,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:12:57,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:12:57,714 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-11 13:12:57,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:12:57,826 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-11 13:12:57,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 13:12:57,827 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-11 13:12:57,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:12:57,828 INFO L225 Difference]: With dead ends: 58 [2020-10-11 13:12:57,828 INFO L226 Difference]: Without dead ends: 52 [2020-10-11 13:12:57,829 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:12:57,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-11 13:12:57,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-11 13:12:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-11 13:12:57,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-11 13:12:57,834 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-11 13:12:57,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:12:57,834 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-11 13:12:57,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:12:57,834 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-11 13:12:57,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:12:57,835 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:12:57,835 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:12:58,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:12:58,048 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:12:58,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:12:58,049 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-11 13:12:58,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:12:58,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331640904] [2020-10-11 13:12:58,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:12:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:12:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:12:58,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331640904] [2020-10-11 13:12:58,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948257746] [2020-10-11 13:12:58,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:12:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:12:58,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:12:58,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:12:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:12:58,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:12:58,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-11 13:12:58,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830035825] [2020-10-11 13:12:58,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 13:12:58,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:12:58,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 13:12:58,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-11 13:12:58,199 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-11 13:12:58,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:12:58,338 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-11 13:12:58,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:12:58,341 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-11 13:12:58,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:12:58,342 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:12:58,343 INFO L226 Difference]: Without dead ends: 72 [2020-10-11 13:12:58,343 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:12:58,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-11 13:12:58,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-11 13:12:58,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:12:58,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-11 13:12:58,355 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-11 13:12:58,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:12:58,356 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-11 13:12:58,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 13:12:58,356 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-11 13:12:58,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:12:58,357 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:12:58,357 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:12:58,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:12:58,572 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:12:58,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:12:58,572 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-11 13:12:58,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:12:58,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814345632] [2020-10-11 13:12:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:12:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:12:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:12:58,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814345632] [2020-10-11 13:12:58,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721305409] [2020-10-11 13:12:58,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:12:58,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:12:58,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:12:58,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:12:58,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:12:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:12:58,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:12:58,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-11 13:12:58,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603595706] [2020-10-11 13:12:58,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:12:58,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:12:58,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:12:58,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:12:58,719 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-11 13:12:58,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:12:58,869 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-11 13:12:58,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 13:12:58,870 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-11 13:12:58,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:12:58,871 INFO L225 Difference]: With dead ends: 62 [2020-10-11 13:12:58,871 INFO L226 Difference]: Without dead ends: 54 [2020-10-11 13:12:58,871 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:12:58,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-11 13:12:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-11 13:12:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-11 13:12:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-11 13:12:58,875 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-11 13:12:58,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:12:58,876 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-11 13:12:58,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:12:58,876 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-11 13:12:58,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:12:58,877 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:12:58,877 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:12:59,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-11 13:12:59,089 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:12:59,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:12:59,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-11 13:12:59,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:12:59,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341833976] [2020-10-11 13:12:59,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:12:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:12:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:12:59,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341833976] [2020-10-11 13:12:59,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387368797] [2020-10-11 13:12:59,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:12:59,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 13:12:59,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:12:59,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:12:59,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:12:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:12:59,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:12:59,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-11 13:12:59,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126701251] [2020-10-11 13:12:59,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:12:59,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:12:59,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:12:59,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:12:59,228 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-11 13:12:59,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:12:59,318 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-11 13:12:59,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 13:12:59,319 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-11 13:12:59,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:12:59,319 INFO L225 Difference]: With dead ends: 64 [2020-10-11 13:12:59,319 INFO L226 Difference]: Without dead ends: 58 [2020-10-11 13:12:59,320 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:12:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-11 13:12:59,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-11 13:12:59,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-11 13:12:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-11 13:12:59,324 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-11 13:12:59,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:12:59,324 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-11 13:12:59,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:12:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-11 13:12:59,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:12:59,325 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:12:59,325 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:12:59,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:12:59,536 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:12:59,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:12:59,536 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-11 13:12:59,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:12:59,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297866436] [2020-10-11 13:12:59,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:12:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:12:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:12:59,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297866436] [2020-10-11 13:12:59,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899558875] [2020-10-11 13:12:59,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:12:59,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:12:59,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:12:59,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:12:59,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:12:59,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:12:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:12:59,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:12:59,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-11 13:12:59,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127138467] [2020-10-11 13:12:59,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:12:59,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:12:59,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:12:59,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:12:59,701 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-11 13:12:59,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:12:59,846 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-11 13:12:59,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 13:12:59,847 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-11 13:12:59,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:12:59,847 INFO L225 Difference]: With dead ends: 61 [2020-10-11 13:12:59,847 INFO L226 Difference]: Without dead ends: 55 [2020-10-11 13:12:59,848 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:12:59,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-11 13:12:59,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-11 13:12:59,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-11 13:12:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-11 13:12:59,852 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-11 13:12:59,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:12:59,852 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-11 13:12:59,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:12:59,852 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-11 13:12:59,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:12:59,853 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:12:59,853 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:00,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:00,063 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:00,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:00,063 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-11 13:13:00,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:00,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774374995] [2020-10-11 13:13:00,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:00,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774374995] [2020-10-11 13:13:00,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938748600] [2020-10-11 13:13:00,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:00,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:00,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:00,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:00,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:00,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:00,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:00,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-11 13:13:00,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595951107] [2020-10-11 13:13:00,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:00,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:00,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:00,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:00,206 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-11 13:13:00,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:00,340 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-11 13:13:00,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:00,340 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-11 13:13:00,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:00,341 INFO L225 Difference]: With dead ends: 77 [2020-10-11 13:13:00,342 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 13:13:00,345 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:00,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 13:13:00,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-11 13:13:00,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-11 13:13:00,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-11 13:13:00,355 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-11 13:13:00,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:00,356 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-11 13:13:00,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:00,356 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-11 13:13:00,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:00,361 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:00,361 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:00,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-11 13:13:00,562 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:00,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:00,563 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-11 13:13:00,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:00,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062092866] [2020-10-11 13:13:00,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:00,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:00,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062092866] [2020-10-11 13:13:00,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281733211] [2020-10-11 13:13:00,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:00,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 13:13:00,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:00,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:00,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:00,698 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:00,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:00,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-11 13:13:00,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593381756] [2020-10-11 13:13:00,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:00,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:00,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:00,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:00,708 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-11 13:13:00,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:00,914 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-11 13:13:00,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:13:00,914 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-11 13:13:00,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:00,915 INFO L225 Difference]: With dead ends: 58 [2020-10-11 13:13:00,915 INFO L226 Difference]: Without dead ends: 50 [2020-10-11 13:13:00,915 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:13:00,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-11 13:13:00,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-11 13:13:00,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-11 13:13:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-11 13:13:00,918 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-11 13:13:00,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:00,918 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-11 13:13:00,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:00,919 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-11 13:13:00,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:00,919 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:00,919 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:01,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:01,127 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:01,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:01,127 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-11 13:13:01,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:01,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733295530] [2020-10-11 13:13:01,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:01,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733295530] [2020-10-11 13:13:01,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106353294] [2020-10-11 13:13:01,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:01,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:01,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:01,265 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:01,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:01,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-11 13:13:01,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439127457] [2020-10-11 13:13:01,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:01,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:01,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:01,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:01,276 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-11 13:13:01,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:01,454 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-11 13:13:01,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:01,455 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-11 13:13:01,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:01,456 INFO L225 Difference]: With dead ends: 60 [2020-10-11 13:13:01,456 INFO L226 Difference]: Without dead ends: 55 [2020-10-11 13:13:01,457 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:13:01,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-11 13:13:01,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-11 13:13:01,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:01,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-11 13:13:01,461 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-11 13:13:01,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:01,461 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-11 13:13:01,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:01,462 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-11 13:13:01,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:01,462 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:01,462 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:01,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-11 13:13:01,675 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:01,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:01,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-11 13:13:01,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:01,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135956749] [2020-10-11 13:13:01,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:01,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135956749] [2020-10-11 13:13:01,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158173094] [2020-10-11 13:13:01,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:01,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:01,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:01,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:01,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:01,807 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:01,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:01,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 13:13:01,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076493489] [2020-10-11 13:13:01,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:01,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:01,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:01,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:01,818 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-11 13:13:01,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:01,985 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-11 13:13:01,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:01,986 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-11 13:13:01,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:01,987 INFO L225 Difference]: With dead ends: 54 [2020-10-11 13:13:01,987 INFO L226 Difference]: Without dead ends: 49 [2020-10-11 13:13:01,988 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:13:01,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-11 13:13:01,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-11 13:13:01,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-11 13:13:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-11 13:13:01,992 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-11 13:13:01,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:01,992 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-11 13:13:01,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:01,992 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-11 13:13:01,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:01,993 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:01,993 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:02,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-11 13:13:02,204 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:02,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:02,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-11 13:13:02,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:02,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985593970] [2020-10-11 13:13:02,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:02,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985593970] [2020-10-11 13:13:02,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973978193] [2020-10-11 13:13:02,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:02,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 13:13:02,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:02,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:02,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:02,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:02,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-11 13:13:02,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777579826] [2020-10-11 13:13:02,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:02,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:02,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:02,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:02,326 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-11 13:13:02,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:02,425 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-11 13:13:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 13:13:02,426 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-11 13:13:02,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:02,427 INFO L225 Difference]: With dead ends: 60 [2020-10-11 13:13:02,427 INFO L226 Difference]: Without dead ends: 54 [2020-10-11 13:13:02,428 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:02,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-11 13:13:02,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-11 13:13:02,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:02,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-11 13:13:02,431 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-11 13:13:02,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:02,431 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-11 13:13:02,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:02,431 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-11 13:13:02,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:02,432 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:02,432 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:02,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-11 13:13:02,638 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:02,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:02,639 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-11 13:13:02,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:02,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908491239] [2020-10-11 13:13:02,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:02,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908491239] [2020-10-11 13:13:02,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351506183] [2020-10-11 13:13:02,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:02,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:02,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:02,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:02,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:02,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:02,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:02,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 13:13:02,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115916080] [2020-10-11 13:13:02,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:02,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:02,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:02,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:02,821 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-11 13:13:02,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:02,945 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-11 13:13:02,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 13:13:02,945 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-11 13:13:02,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:02,946 INFO L225 Difference]: With dead ends: 66 [2020-10-11 13:13:02,946 INFO L226 Difference]: Without dead ends: 60 [2020-10-11 13:13:02,946 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:13:02,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-11 13:13:02,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-11 13:13:02,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-11 13:13:02,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-11 13:13:02,949 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-11 13:13:02,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:02,949 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-11 13:13:02,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:02,950 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-11 13:13:02,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:02,950 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:02,950 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:03,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-11 13:13:03,159 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:03,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:03,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-11 13:13:03,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:03,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106121543] [2020-10-11 13:13:03,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:03,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106121543] [2020-10-11 13:13:03,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30685652] [2020-10-11 13:13:03,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:03,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 13:13:03,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:03,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:03,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:03,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:03,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-11 13:13:03,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782992203] [2020-10-11 13:13:03,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:03,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:03,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:03,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:03,286 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-11 13:13:03,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:03,456 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-11 13:13:03,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 13:13:03,456 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-11 13:13:03,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:03,457 INFO L225 Difference]: With dead ends: 67 [2020-10-11 13:13:03,458 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 13:13:03,458 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:13:03,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 13:13:03,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-11 13:13:03,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-11 13:13:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-11 13:13:03,462 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-11 13:13:03,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:03,463 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-11 13:13:03,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:03,463 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-11 13:13:03,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:03,464 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:03,464 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:03,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:03,665 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:03,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:03,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-11 13:13:03,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:03,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150547606] [2020-10-11 13:13:03,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:03,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:03,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150547606] [2020-10-11 13:13:03,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910470055] [2020-10-11 13:13:03,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:03,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 13:13:03,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:03,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:03,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:03,825 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:03,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:03,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 13:13:03,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333755961] [2020-10-11 13:13:03,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:03,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:03,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:03,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:03,845 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-11 13:13:04,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:04,042 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-11 13:13:04,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:13:04,043 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-11 13:13:04,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:04,043 INFO L225 Difference]: With dead ends: 69 [2020-10-11 13:13:04,043 INFO L226 Difference]: Without dead ends: 63 [2020-10-11 13:13:04,044 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:13:04,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-11 13:13:04,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-11 13:13:04,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:04,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-11 13:13:04,047 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-11 13:13:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:04,049 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-11 13:13:04,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-11 13:13:04,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:04,050 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:04,050 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:04,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:04,251 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:04,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:04,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-11 13:13:04,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:04,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791803954] [2020-10-11 13:13:04,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:04,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791803954] [2020-10-11 13:13:04,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024210390] [2020-10-11 13:13:04,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:04,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:04,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:04,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:04,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-11 13:13:04,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027660439] [2020-10-11 13:13:04,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:04,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:04,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:04,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:04,367 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-11 13:13:04,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:04,598 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-11 13:13:04,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:04,599 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-11 13:13:04,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:04,600 INFO L225 Difference]: With dead ends: 88 [2020-10-11 13:13:04,600 INFO L226 Difference]: Without dead ends: 82 [2020-10-11 13:13:04,601 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:13:04,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-11 13:13:04,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-11 13:13:04,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 13:13:04,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-11 13:13:04,604 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-11 13:13:04,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:04,604 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-11 13:13:04,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:04,605 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-11 13:13:04,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:04,605 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:04,605 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:04,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:04,816 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:04,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:04,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-11 13:13:04,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:04,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773554975] [2020-10-11 13:13:04,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:04,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:04,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773554975] [2020-10-11 13:13:04,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531837182] [2020-10-11 13:13:04,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:04,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:04,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:04,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:04,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:04,940 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:04,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:04,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 13:13:04,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50183041] [2020-10-11 13:13:04,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:04,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:04,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:04,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:04,954 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-11 13:13:05,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:05,219 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-11 13:13:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:05,224 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-11 13:13:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:05,225 INFO L225 Difference]: With dead ends: 69 [2020-10-11 13:13:05,225 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 13:13:05,226 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:13:05,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 13:13:05,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-11 13:13:05,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-11 13:13:05,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-11 13:13:05,228 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-11 13:13:05,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:05,229 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-11 13:13:05,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:05,229 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-11 13:13:05,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:05,229 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:05,229 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:05,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-11 13:13:05,437 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:05,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:05,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-11 13:13:05,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:05,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828584857] [2020-10-11 13:13:05,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:05,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828584857] [2020-10-11 13:13:05,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073827210] [2020-10-11 13:13:05,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:05,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 13:13:05,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:05,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:05,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:05,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:05,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:05,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-11 13:13:05,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139211651] [2020-10-11 13:13:05,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:05,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:05,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:05,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:05,578 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-11 13:13:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:05,713 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-11 13:13:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:05,714 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-11 13:13:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:05,714 INFO L225 Difference]: With dead ends: 74 [2020-10-11 13:13:05,714 INFO L226 Difference]: Without dead ends: 68 [2020-10-11 13:13:05,715 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:13:05,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-11 13:13:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-11 13:13:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-11 13:13:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-11 13:13:05,717 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-11 13:13:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:05,717 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-11 13:13:05,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:05,718 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-11 13:13:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:05,718 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:05,718 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:05,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-11 13:13:05,926 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:05,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:05,926 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-11 13:13:05,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:05,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381564280] [2020-10-11 13:13:05,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:05,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:05,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381564280] [2020-10-11 13:13:05,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000486129] [2020-10-11 13:13:05,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:06,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:06,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:06,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:06,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:06,064 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:06,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:06,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 13:13:06,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297428053] [2020-10-11 13:13:06,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:06,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:06,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:06,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:06,077 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-11 13:13:06,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:06,269 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-11 13:13:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:13:06,269 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 13:13:06,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:06,270 INFO L225 Difference]: With dead ends: 71 [2020-10-11 13:13:06,271 INFO L226 Difference]: Without dead ends: 65 [2020-10-11 13:13:06,271 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:13:06,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-11 13:13:06,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-11 13:13:06,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:06,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-11 13:13:06,274 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-11 13:13:06,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:06,275 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-11 13:13:06,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:06,275 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-11 13:13:06,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:06,275 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:06,275 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:06,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-11 13:13:06,485 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:06,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:06,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-11 13:13:06,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:06,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690126300] [2020-10-11 13:13:06,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:06,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:06,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690126300] [2020-10-11 13:13:06,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019336283] [2020-10-11 13:13:06,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:06,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 13:13:06,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:06,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:06,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:06,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:06,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-11 13:13:06,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676778457] [2020-10-11 13:13:06,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:06,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:06,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:06,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:06,620 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-11 13:13:06,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:06,790 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-11 13:13:06,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 13:13:06,791 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-11 13:13:06,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:06,792 INFO L225 Difference]: With dead ends: 68 [2020-10-11 13:13:06,792 INFO L226 Difference]: Without dead ends: 62 [2020-10-11 13:13:06,793 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:13:06,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-11 13:13:06,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-11 13:13:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-11 13:13:06,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-11 13:13:06,795 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-11 13:13:06,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:06,796 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-11 13:13:06,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:06,796 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-11 13:13:06,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:06,796 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:06,797 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:07,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-11 13:13:07,006 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:07,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:07,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-11 13:13:07,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:07,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082679909] [2020-10-11 13:13:07,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:07,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082679909] [2020-10-11 13:13:07,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942707586] [2020-10-11 13:13:07,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:07,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 13:13:07,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:07,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:07,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:07,152 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:07,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:07,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 13:13:07,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446263305] [2020-10-11 13:13:07,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:07,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:07,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:07,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:07,163 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-11 13:13:07,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:07,413 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-11 13:13:07,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:07,414 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 13:13:07,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:07,415 INFO L225 Difference]: With dead ends: 67 [2020-10-11 13:13:07,415 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 13:13:07,416 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:13:07,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 13:13:07,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-11 13:13:07,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:07,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-11 13:13:07,419 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-11 13:13:07,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:07,419 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-11 13:13:07,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:07,419 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-11 13:13:07,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:07,420 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:07,420 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:07,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-11 13:13:07,627 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:07,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:07,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-11 13:13:07,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:07,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186329605] [2020-10-11 13:13:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:07,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186329605] [2020-10-11 13:13:07,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552886456] [2020-10-11 13:13:07,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:07,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:07,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:07,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:07,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-11 13:13:07,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974398926] [2020-10-11 13:13:07,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:07,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:07,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:07,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:07,750 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-11 13:13:07,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:07,963 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-11 13:13:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:07,963 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-11 13:13:07,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:07,964 INFO L225 Difference]: With dead ends: 83 [2020-10-11 13:13:07,965 INFO L226 Difference]: Without dead ends: 77 [2020-10-11 13:13:07,965 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:13:07,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-11 13:13:07,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-11 13:13:07,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 13:13:07,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-11 13:13:07,969 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-11 13:13:07,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:07,970 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-11 13:13:07,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:07,970 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-11 13:13:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:07,970 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:07,970 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:08,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:08,180 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:08,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:08,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-11 13:13:08,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:08,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563645676] [2020-10-11 13:13:08,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:08,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563645676] [2020-10-11 13:13:08,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054460578] [2020-10-11 13:13:08,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:08,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:08,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:08,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:08,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:08,297 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:08,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:08,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 13:13:08,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807119704] [2020-10-11 13:13:08,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:08,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:08,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:08,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:08,310 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-11 13:13:08,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:08,604 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-11 13:13:08,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:13:08,605 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 13:13:08,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:08,605 INFO L225 Difference]: With dead ends: 64 [2020-10-11 13:13:08,606 INFO L226 Difference]: Without dead ends: 56 [2020-10-11 13:13:08,606 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:13:08,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-11 13:13:08,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-10-11 13:13:08,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-11 13:13:08,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-11 13:13:08,608 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-11 13:13:08,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:08,608 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-11 13:13:08,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:08,609 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-11 13:13:08,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:08,610 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:08,610 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:08,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-11 13:13:08,811 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:08,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:08,812 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-11 13:13:08,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:08,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812076403] [2020-10-11 13:13:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:08,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812076403] [2020-10-11 13:13:08,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226631831] [2020-10-11 13:13:08,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:08,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 13:13:08,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:08,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:08,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:08,924 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:08,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:08,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 13:13:08,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642167818] [2020-10-11 13:13:08,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:08,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:08,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:08,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:08,944 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-11 13:13:09,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:09,213 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-11 13:13:09,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:09,214 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 13:13:09,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:09,215 INFO L225 Difference]: With dead ends: 68 [2020-10-11 13:13:09,215 INFO L226 Difference]: Without dead ends: 63 [2020-10-11 13:13:09,215 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:13:09,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-11 13:13:09,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-11 13:13:09,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 13:13:09,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-11 13:13:09,219 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-11 13:13:09,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:09,219 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-11 13:13:09,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:09,219 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-11 13:13:09,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:09,220 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:09,220 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:09,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-11 13:13:09,421 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:09,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:09,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-11 13:13:09,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:09,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903062362] [2020-10-11 13:13:09,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:09,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903062362] [2020-10-11 13:13:09,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221056213] [2020-10-11 13:13:09,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:09,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:09,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:09,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:09,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:09,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:09,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:09,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:09,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004797201] [2020-10-11 13:13:09,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:09,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:09,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:09,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:09,572 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-11 13:13:09,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:09,870 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-11 13:13:09,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:09,873 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:09,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:09,874 INFO L225 Difference]: With dead ends: 60 [2020-10-11 13:13:09,874 INFO L226 Difference]: Without dead ends: 55 [2020-10-11 13:13:09,874 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:13:09,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-11 13:13:09,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-11 13:13:09,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 13:13:09,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-11 13:13:09,877 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-11 13:13:09,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:09,877 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-11 13:13:09,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:09,878 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-11 13:13:09,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:09,878 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:09,878 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:10,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:10,079 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:10,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:10,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-11 13:13:10,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:10,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336710130] [2020-10-11 13:13:10,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:10,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336710130] [2020-10-11 13:13:10,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344232819] [2020-10-11 13:13:10,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:10,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 13:13:10,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:10,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:10,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:10,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:10,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 13:13:10,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749206756] [2020-10-11 13:13:10,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:10,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:10,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:10,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:10,259 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-11 13:13:10,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:10,388 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-11 13:13:10,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:10,390 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-11 13:13:10,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:10,390 INFO L225 Difference]: With dead ends: 66 [2020-10-11 13:13:10,390 INFO L226 Difference]: Without dead ends: 60 [2020-10-11 13:13:10,391 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:13:10,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-11 13:13:10,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-11 13:13:10,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:10,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-11 13:13:10,393 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-11 13:13:10,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:10,393 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-11 13:13:10,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:10,394 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-11 13:13:10,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:10,396 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:10,396 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:10,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:10,597 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:10,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:10,597 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-11 13:13:10,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:10,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705569707] [2020-10-11 13:13:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:10,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705569707] [2020-10-11 13:13:10,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536338055] [2020-10-11 13:13:10,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:10,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 13:13:10,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:10,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:10,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:10,741 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:10,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:10,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:10,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336316564] [2020-10-11 13:13:10,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:10,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:10,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:10,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:10,754 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-11 13:13:10,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:10,934 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-11 13:13:10,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:13:10,935 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:10,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:10,935 INFO L225 Difference]: With dead ends: 74 [2020-10-11 13:13:10,935 INFO L226 Difference]: Without dead ends: 68 [2020-10-11 13:13:10,936 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:13:10,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-11 13:13:10,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-11 13:13:10,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-11 13:13:10,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-11 13:13:10,938 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-11 13:13:10,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:10,938 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-11 13:13:10,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:10,939 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-11 13:13:10,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:10,939 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:10,939 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:11,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-11 13:13:11,148 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:11,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:11,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-11 13:13:11,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:11,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110596658] [2020-10-11 13:13:11,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:11,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110596658] [2020-10-11 13:13:11,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071678072] [2020-10-11 13:13:11,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:11,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:11,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:11,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:11,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 13:13:11,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087751893] [2020-10-11 13:13:11,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:11,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:11,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:11,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:11,280 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-11 13:13:11,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:11,482 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-11 13:13:11,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:11,483 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-11 13:13:11,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:11,483 INFO L225 Difference]: With dead ends: 75 [2020-10-11 13:13:11,484 INFO L226 Difference]: Without dead ends: 69 [2020-10-11 13:13:11,484 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:13:11,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-11 13:13:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-11 13:13:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-11 13:13:11,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-11 13:13:11,488 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-11 13:13:11,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:11,488 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-11 13:13:11,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:11,488 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-11 13:13:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:11,489 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:11,489 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:11,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:11,690 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:11,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:11,690 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-11 13:13:11,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:11,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701275163] [2020-10-11 13:13:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:11,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701275163] [2020-10-11 13:13:11,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943824168] [2020-10-11 13:13:11,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:11,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:11,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:11,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:11,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:11,868 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:11,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:11,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:11,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836944079] [2020-10-11 13:13:11,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:11,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:11,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:11,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:11,882 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-11 13:13:12,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:12,189 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-11 13:13:12,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:12,190 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:12,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:12,191 INFO L225 Difference]: With dead ends: 79 [2020-10-11 13:13:12,191 INFO L226 Difference]: Without dead ends: 73 [2020-10-11 13:13:12,191 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:13:12,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-11 13:13:12,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-11 13:13:12,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:12,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-11 13:13:12,194 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-11 13:13:12,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:12,194 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-11 13:13:12,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:12,195 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-11 13:13:12,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:12,195 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:12,195 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:12,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-11 13:13:12,403 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:12,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:12,403 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-11 13:13:12,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:12,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685050207] [2020-10-11 13:13:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:12,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685050207] [2020-10-11 13:13:12,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378613475] [2020-10-11 13:13:12,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:12,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 13:13:12,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:12,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:12,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:12,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:12,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 13:13:12,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488207546] [2020-10-11 13:13:12,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:12,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:12,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:12,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:12,584 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-11 13:13:12,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:12,917 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-11 13:13:12,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:13:12,918 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-11 13:13:12,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:12,919 INFO L225 Difference]: With dead ends: 79 [2020-10-11 13:13:12,919 INFO L226 Difference]: Without dead ends: 73 [2020-10-11 13:13:12,920 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:13:12,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-11 13:13:12,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-11 13:13:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-11 13:13:12,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-11 13:13:12,924 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-11 13:13:12,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:12,924 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-11 13:13:12,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:12,925 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-11 13:13:12,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:12,925 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:12,926 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:13,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:13,138 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:13,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:13,139 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-11 13:13:13,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:13,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131854029] [2020-10-11 13:13:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:13,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131854029] [2020-10-11 13:13:13,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257903951] [2020-10-11 13:13:13,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:13,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:13,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:13,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:13,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:13,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:13,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:13,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:13,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:13,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400105411] [2020-10-11 13:13:13,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:13,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:13,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:13,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:13,290 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-11 13:13:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:13,572 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-11 13:13:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:13:13,572 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:13,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:13,573 INFO L225 Difference]: With dead ends: 76 [2020-10-11 13:13:13,573 INFO L226 Difference]: Without dead ends: 70 [2020-10-11 13:13:13,574 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:13:13,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-11 13:13:13,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-11 13:13:13,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 13:13:13,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-11 13:13:13,577 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-11 13:13:13,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:13,577 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-11 13:13:13,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:13,578 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-11 13:13:13,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:13,578 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:13,578 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:13,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-11 13:13:13,780 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:13,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:13,780 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-11 13:13:13,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:13,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108477891] [2020-10-11 13:13:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:13,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108477891] [2020-10-11 13:13:13,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349679568] [2020-10-11 13:13:13,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:13,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 13:13:13,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:13,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:13,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:13,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:13,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 13:13:13,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325082556] [2020-10-11 13:13:13,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:13,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:13,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:13,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:13,909 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-11 13:13:14,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:14,184 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-11 13:13:14,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:14,185 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-11 13:13:14,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:14,186 INFO L225 Difference]: With dead ends: 96 [2020-10-11 13:13:14,186 INFO L226 Difference]: Without dead ends: 90 [2020-10-11 13:13:14,187 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:13:14,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-11 13:13:14,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-11 13:13:14,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:13:14,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-11 13:13:14,191 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-11 13:13:14,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:14,191 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-11 13:13:14,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:14,191 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-11 13:13:14,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:14,192 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:14,192 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:14,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-11 13:13:14,401 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:14,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:14,402 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-11 13:13:14,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:14,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842497124] [2020-10-11 13:13:14,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:14,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842497124] [2020-10-11 13:13:14,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964954498] [2020-10-11 13:13:14,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:14,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 13:13:14,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:14,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:14,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:14,577 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:14,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:14,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:14,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053183020] [2020-10-11 13:13:14,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:14,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:14,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:14,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:14,592 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-11 13:13:15,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:15,035 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-11 13:13:15,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:13:15,036 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:15,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:15,037 INFO L225 Difference]: With dead ends: 77 [2020-10-11 13:13:15,037 INFO L226 Difference]: Without dead ends: 69 [2020-10-11 13:13:15,038 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:13:15,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-11 13:13:15,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-11 13:13:15,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-11 13:13:15,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-11 13:13:15,041 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-11 13:13:15,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:15,042 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-11 13:13:15,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-11 13:13:15,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:15,043 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:15,043 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:15,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-11 13:13:15,252 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:15,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:15,253 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-11 13:13:15,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:15,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722103444] [2020-10-11 13:13:15,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:15,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722103444] [2020-10-11 13:13:15,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608737858] [2020-10-11 13:13:15,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:15,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:15,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:15,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:15,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 13:13:15,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057798107] [2020-10-11 13:13:15,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:15,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:15,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:15,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:15,452 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-11 13:13:15,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:15,653 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-11 13:13:15,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 13:13:15,654 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-11 13:13:15,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:15,655 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:13:15,655 INFO L226 Difference]: Without dead ends: 78 [2020-10-11 13:13:15,655 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:13:15,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-11 13:13:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-11 13:13:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:13:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-11 13:13:15,658 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-11 13:13:15,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:15,658 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-11 13:13:15,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:15,658 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-11 13:13:15,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:15,662 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:15,662 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:15,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-11 13:13:15,873 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:15,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:15,873 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-11 13:13:15,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:15,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452457535] [2020-10-11 13:13:15,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:16,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452457535] [2020-10-11 13:13:16,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664283932] [2020-10-11 13:13:16,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:16,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:16,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:16,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:16,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:16,084 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:16,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:16,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:13:16,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189343024] [2020-10-11 13:13:16,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:16,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:16,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:16,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:16,100 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-11 13:13:16,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:16,323 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-11 13:13:16,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:16,323 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:13:16,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:16,324 INFO L225 Difference]: With dead ends: 81 [2020-10-11 13:13:16,324 INFO L226 Difference]: Without dead ends: 75 [2020-10-11 13:13:16,324 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:13:16,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-11 13:13:16,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-11 13:13:16,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:13:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-11 13:13:16,328 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-11 13:13:16,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:16,328 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-11 13:13:16,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:16,328 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-11 13:13:16,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:16,329 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:16,329 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:16,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-11 13:13:16,537 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:16,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:16,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-11 13:13:16,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:16,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148728244] [2020-10-11 13:13:16,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:16,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148728244] [2020-10-11 13:13:16,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389810802] [2020-10-11 13:13:16,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:16,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 13:13:16,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:16,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:16,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:16,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:16,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 13:13:16,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84203269] [2020-10-11 13:13:16,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:16,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:16,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:16,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:16,748 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-11 13:13:17,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:17,018 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-11 13:13:17,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:17,018 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-11 13:13:17,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:17,019 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:13:17,019 INFO L226 Difference]: Without dead ends: 72 [2020-10-11 13:13:17,020 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:13:17,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-11 13:13:17,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-11 13:13:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:13:17,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-11 13:13:17,024 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-11 13:13:17,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:17,024 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-11 13:13:17,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:17,024 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-11 13:13:17,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:17,025 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:17,025 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:17,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-11 13:13:17,234 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:17,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:17,235 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-11 13:13:17,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:17,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068240294] [2020-10-11 13:13:17,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:17,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068240294] [2020-10-11 13:13:17,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117778337] [2020-10-11 13:13:17,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:17,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:17,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:17,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:17,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:17,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:17,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:17,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:13:17,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234004662] [2020-10-11 13:13:17,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:17,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:17,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:17,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:17,388 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-11 13:13:17,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:17,670 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-11 13:13:17,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:13:17,671 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:13:17,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:17,672 INFO L225 Difference]: With dead ends: 77 [2020-10-11 13:13:17,672 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 13:13:17,672 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:13:17,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 13:13:17,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-11 13:13:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:13:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-11 13:13:17,675 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-11 13:13:17,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:17,675 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-11 13:13:17,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:17,675 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-11 13:13:17,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:17,675 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:17,676 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:17,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-11 13:13:17,882 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:17,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:17,882 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-11 13:13:17,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:17,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208300117] [2020-10-11 13:13:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:17,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208300117] [2020-10-11 13:13:17,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831975873] [2020-10-11 13:13:17,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:18,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 13:13:18,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:18,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:18,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:18,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:18,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 13:13:18,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027467196] [2020-10-11 13:13:18,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:18,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:18,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:18,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:18,041 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-11 13:13:18,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:18,322 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-11 13:13:18,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:13:18,323 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-11 13:13:18,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:18,324 INFO L225 Difference]: With dead ends: 74 [2020-10-11 13:13:18,324 INFO L226 Difference]: Without dead ends: 68 [2020-10-11 13:13:18,325 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:13:18,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-11 13:13:18,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-11 13:13:18,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:13:18,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-11 13:13:18,328 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-11 13:13:18,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:18,328 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-11 13:13:18,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:18,328 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-11 13:13:18,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:18,329 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:18,329 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:18,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:18,540 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:18,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:18,541 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-11 13:13:18,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:18,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180190483] [2020-10-11 13:13:18,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:18,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180190483] [2020-10-11 13:13:18,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321397079] [2020-10-11 13:13:18,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:18,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 13:13:18,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:18,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:18,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:18,686 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:18,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:18,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:13:18,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216319498] [2020-10-11 13:13:18,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:18,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:18,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:18,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:18,707 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-11 13:13:19,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:19,081 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-11 13:13:19,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:13:19,082 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:13:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:19,083 INFO L225 Difference]: With dead ends: 73 [2020-10-11 13:13:19,083 INFO L226 Difference]: Without dead ends: 67 [2020-10-11 13:13:19,083 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:13:19,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-11 13:13:19,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-11 13:13:19,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:13:19,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-11 13:13:19,087 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-11 13:13:19,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:19,087 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-11 13:13:19,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:19,087 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-11 13:13:19,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:19,088 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:19,088 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:19,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-11 13:13:19,297 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:19,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:19,298 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-11 13:13:19,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:19,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687779144] [2020-10-11 13:13:19,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:19,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687779144] [2020-10-11 13:13:19,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022507637] [2020-10-11 13:13:19,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:19,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:19,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:19,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:19,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 13:13:19,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942470611] [2020-10-11 13:13:19,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:19,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:19,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:19,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:19,447 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-11 13:13:19,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:19,717 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-11 13:13:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:19,717 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-11 13:13:19,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:19,718 INFO L225 Difference]: With dead ends: 89 [2020-10-11 13:13:19,718 INFO L226 Difference]: Without dead ends: 83 [2020-10-11 13:13:19,719 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:13:19,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-11 13:13:19,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-11 13:13:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-11 13:13:19,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-11 13:13:19,722 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-11 13:13:19,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:19,723 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-11 13:13:19,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:19,723 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-11 13:13:19,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:19,723 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:19,723 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:19,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:19,931 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:19,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:19,932 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-11 13:13:19,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:19,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810467352] [2020-10-11 13:13:19,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:19,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810467352] [2020-10-11 13:13:19,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747469739] [2020-10-11 13:13:19,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:20,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:20,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:20,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:20,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:20,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:20,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:13:20,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436726354] [2020-10-11 13:13:20,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:20,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:20,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:20,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:20,075 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-11 13:13:20,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:20,417 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-10-11 13:13:20,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:13:20,418 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:13:20,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:20,419 INFO L225 Difference]: With dead ends: 68 [2020-10-11 13:13:20,419 INFO L226 Difference]: Without dead ends: 60 [2020-10-11 13:13:20,420 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:13:20,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-11 13:13:20,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-10-11 13:13:20,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-11 13:13:20,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-11 13:13:20,423 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-11 13:13:20,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:20,423 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-11 13:13:20,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:20,423 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-11 13:13:20,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:20,424 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:20,424 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:20,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-11 13:13:20,627 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:20,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:20,627 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-11 13:13:20,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:20,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352116984] [2020-10-11 13:13:20,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:20,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352116984] [2020-10-11 13:13:20,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191816474] [2020-10-11 13:13:20,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:20,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 13:13:20,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:20,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:20,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:20,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:20,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:20,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:13:20,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874480176] [2020-10-11 13:13:20,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:20,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:20,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:20,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:20,775 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-11 13:13:21,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:21,174 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-11 13:13:21,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:21,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:13:21,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:21,175 INFO L225 Difference]: With dead ends: 76 [2020-10-11 13:13:21,175 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 13:13:21,175 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:13:21,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 13:13:21,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-11 13:13:21,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:13:21,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-11 13:13:21,178 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-11 13:13:21,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:21,178 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-11 13:13:21,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:21,179 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-11 13:13:21,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:21,179 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:21,179 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:21,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:21,387 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:21,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:21,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-11 13:13:21,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:21,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248276039] [2020-10-11 13:13:21,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:21,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248276039] [2020-10-11 13:13:21,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216633311] [2020-10-11 13:13:21,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:21,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:21,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:21,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:21,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:21,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:21,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:21,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:21,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:21,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147816825] [2020-10-11 13:13:21,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:21,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:21,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:21,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:21,579 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-11 13:13:21,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:21,962 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-11 13:13:21,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:21,962 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:21,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:21,963 INFO L225 Difference]: With dead ends: 66 [2020-10-11 13:13:21,963 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 13:13:21,965 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:13:21,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 13:13:21,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-11 13:13:21,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:21,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-11 13:13:21,967 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-11 13:13:21,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:21,968 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-11 13:13:21,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:21,968 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-11 13:13:21,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:21,968 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:21,968 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:22,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-11 13:13:22,171 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:22,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:22,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-11 13:13:22,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:22,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412984727] [2020-10-11 13:13:22,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:22,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412984727] [2020-10-11 13:13:22,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68696043] [2020-10-11 13:13:22,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:22,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 13:13:22,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:22,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:22,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:22,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:22,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:13:22,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617829132] [2020-10-11 13:13:22,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:22,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:22,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:22,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:22,331 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-11 13:13:22,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:22,507 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-11 13:13:22,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 13:13:22,507 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:13:22,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:22,508 INFO L225 Difference]: With dead ends: 72 [2020-10-11 13:13:22,508 INFO L226 Difference]: Without dead ends: 66 [2020-10-11 13:13:22,509 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:13:22,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-11 13:13:22,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-11 13:13:22,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 13:13:22,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-11 13:13:22,512 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-11 13:13:22,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:22,512 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-11 13:13:22,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:22,513 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-11 13:13:22,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:22,513 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:22,513 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:22,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-11 13:13:22,716 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:22,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:22,716 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-11 13:13:22,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:22,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056145739] [2020-10-11 13:13:22,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:22,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056145739] [2020-10-11 13:13:22,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863666533] [2020-10-11 13:13:22,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:22,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 13:13:22,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:22,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:22,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:22,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:22,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:22,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:22,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011170010] [2020-10-11 13:13:22,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:22,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:22,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:22,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:22,898 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-11 13:13:23,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:23,118 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-11 13:13:23,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:23,119 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:23,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:23,120 INFO L225 Difference]: With dead ends: 82 [2020-10-11 13:13:23,120 INFO L226 Difference]: Without dead ends: 76 [2020-10-11 13:13:23,121 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:13:23,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-11 13:13:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-11 13:13:23,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 13:13:23,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-11 13:13:23,123 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-11 13:13:23,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:23,123 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-11 13:13:23,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:23,124 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-11 13:13:23,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:23,124 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:23,124 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:23,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-11 13:13:23,334 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:23,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:23,334 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-11 13:13:23,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:23,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990018255] [2020-10-11 13:13:23,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:23,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990018255] [2020-10-11 13:13:23,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816566431] [2020-10-11 13:13:23,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:23,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:23,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:23,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:23,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:13:23,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586957553] [2020-10-11 13:13:23,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:23,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:23,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:23,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:23,483 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-11 13:13:23,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:23,726 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-11 13:13:23,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:13:23,727 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:13:23,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:23,728 INFO L225 Difference]: With dead ends: 83 [2020-10-11 13:13:23,729 INFO L226 Difference]: Without dead ends: 77 [2020-10-11 13:13:23,729 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:13:23,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-11 13:13:23,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-11 13:13:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-11 13:13:23,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-11 13:13:23,731 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-11 13:13:23,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:23,732 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-11 13:13:23,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:23,732 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-11 13:13:23,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:23,732 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:23,732 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:23,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-11 13:13:23,942 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:23,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:23,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-11 13:13:23,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:23,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777133855] [2020-10-11 13:13:23,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:24,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777133855] [2020-10-11 13:13:24,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947024217] [2020-10-11 13:13:24,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:24,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:24,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:24,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:24,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:24,155 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:24,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:24,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:24,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845919166] [2020-10-11 13:13:24,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:24,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:24,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:24,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:24,175 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-11 13:13:24,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:24,494 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-11 13:13:24,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:13:24,500 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:24,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:24,502 INFO L225 Difference]: With dead ends: 89 [2020-10-11 13:13:24,502 INFO L226 Difference]: Without dead ends: 83 [2020-10-11 13:13:24,502 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:13:24,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-11 13:13:24,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-11 13:13:24,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 13:13:24,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-11 13:13:24,506 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-11 13:13:24,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:24,507 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-11 13:13:24,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:24,507 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-11 13:13:24,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:24,508 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:24,508 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:24,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:24,718 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:24,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:24,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-11 13:13:24,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:24,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360767494] [2020-10-11 13:13:24,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:24,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:24,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360767494] [2020-10-11 13:13:24,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140039056] [2020-10-11 13:13:24,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:24,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-11 13:13:24,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:24,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:24,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:24,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:24,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:13:24,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546033779] [2020-10-11 13:13:24,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:24,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:24,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:24,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:24,975 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-11 13:13:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:25,307 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-11 13:13:25,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:25,307 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:13:25,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:25,308 INFO L225 Difference]: With dead ends: 89 [2020-10-11 13:13:25,308 INFO L226 Difference]: Without dead ends: 83 [2020-10-11 13:13:25,309 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:13:25,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-11 13:13:25,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-11 13:13:25,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:13:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-11 13:13:25,312 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-11 13:13:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:25,312 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-11 13:13:25,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:25,312 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-11 13:13:25,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:25,312 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:25,313 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:25,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:25,521 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:25,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:25,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-11 13:13:25,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:25,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428703208] [2020-10-11 13:13:25,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:25,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428703208] [2020-10-11 13:13:25,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7876629] [2020-10-11 13:13:25,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:25,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:25,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:25,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:25,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:25,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:25,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:25,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:25,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36952981] [2020-10-11 13:13:25,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:25,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:25,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:25,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:25,688 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-11 13:13:26,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:26,039 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-11 13:13:26,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:13:26,039 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:26,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:26,041 INFO L225 Difference]: With dead ends: 86 [2020-10-11 13:13:26,041 INFO L226 Difference]: Without dead ends: 80 [2020-10-11 13:13:26,041 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:13:26,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-11 13:13:26,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-11 13:13:26,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:13:26,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-11 13:13:26,044 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-11 13:13:26,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:26,044 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-11 13:13:26,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:26,045 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-11 13:13:26,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:26,045 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:26,045 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:26,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-11 13:13:26,248 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:26,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:26,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-11 13:13:26,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:26,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194368536] [2020-10-11 13:13:26,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:26,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194368536] [2020-10-11 13:13:26,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199901191] [2020-10-11 13:13:26,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:26,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 13:13:26,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:26,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:26,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:26,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:26,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:13:26,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937877983] [2020-10-11 13:13:26,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:26,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:26,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:26,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:26,385 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-11 13:13:26,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:26,723 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-11 13:13:26,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:13:26,723 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:13:26,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:26,724 INFO L225 Difference]: With dead ends: 87 [2020-10-11 13:13:26,724 INFO L226 Difference]: Without dead ends: 81 [2020-10-11 13:13:26,725 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:13:26,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-11 13:13:26,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-11 13:13:26,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-11 13:13:26,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-11 13:13:26,728 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-11 13:13:26,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:26,729 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-11 13:13:26,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:26,729 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-11 13:13:26,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:26,729 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:26,729 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:26,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:26,938 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:26,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:26,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-11 13:13:26,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:26,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079175774] [2020-10-11 13:13:26,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:27,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079175774] [2020-10-11 13:13:27,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348142318] [2020-10-11 13:13:27,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:27,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 13:13:27,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:27,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:27,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:27,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:27,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:27,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:27,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443271456] [2020-10-11 13:13:27,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:27,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:27,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:27,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:27,125 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-11 13:13:27,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:27,542 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-11 13:13:27,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:13:27,543 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:27,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:27,544 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:13:27,545 INFO L226 Difference]: Without dead ends: 78 [2020-10-11 13:13:27,545 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:13:27,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-11 13:13:27,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-11 13:13:27,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:13:27,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-11 13:13:27,547 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-11 13:13:27,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:27,548 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-11 13:13:27,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:27,548 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-11 13:13:27,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:27,548 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:27,549 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:27,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-11 13:13:27,758 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:27,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:27,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-11 13:13:27,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:27,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613488648] [2020-10-11 13:13:27,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:27,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613488648] [2020-10-11 13:13:27,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196058731] [2020-10-11 13:13:27,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:27,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:27,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:27,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:27,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:13:27,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264312263] [2020-10-11 13:13:27,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:27,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:27,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:27,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:27,978 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-11 13:13:28,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:28,341 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-11 13:13:28,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:13:28,341 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:13:28,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:28,342 INFO L225 Difference]: With dead ends: 104 [2020-10-11 13:13:28,342 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 13:13:28,343 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:13:28,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 13:13:28,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-11 13:13:28,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 13:13:28,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-11 13:13:28,345 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-11 13:13:28,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:28,346 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-11 13:13:28,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:28,346 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-11 13:13:28,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:28,346 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:28,346 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:28,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-11 13:13:28,554 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:28,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:28,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-11 13:13:28,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:28,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058774675] [2020-10-11 13:13:28,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:28,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058774675] [2020-10-11 13:13:28,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49065465] [2020-10-11 13:13:28,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:28,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:28,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:28,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:28,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:28,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:28,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:28,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:28,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945417570] [2020-10-11 13:13:28,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:28,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:28,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:28,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:28,770 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-11 13:13:29,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:29,211 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-11 13:13:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:13:29,211 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:29,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:29,212 INFO L225 Difference]: With dead ends: 85 [2020-10-11 13:13:29,212 INFO L226 Difference]: Without dead ends: 77 [2020-10-11 13:13:29,213 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 13:13:29,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-11 13:13:29,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-11 13:13:29,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-11 13:13:29,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-11 13:13:29,215 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-11 13:13:29,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:29,215 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-11 13:13:29,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:29,216 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-11 13:13:29,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:29,216 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:29,216 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:29,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-11 13:13:29,423 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:29,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:29,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-11 13:13:29,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:29,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623374246] [2020-10-11 13:13:29,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:29,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623374246] [2020-10-11 13:13:29,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425372456] [2020-10-11 13:13:29,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:29,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-11 13:13:29,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:29,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:29,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:29,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:29,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-11 13:13:29,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527172845] [2020-10-11 13:13:29,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:29,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:29,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:29,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:29,668 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-11 13:13:29,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:29,967 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-11 13:13:29,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:29,967 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-11 13:13:29,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:29,968 INFO L225 Difference]: With dead ends: 94 [2020-10-11 13:13:29,968 INFO L226 Difference]: Without dead ends: 88 [2020-10-11 13:13:29,969 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:13:29,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-11 13:13:29,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-11 13:13:29,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:13:29,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-11 13:13:29,971 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-11 13:13:29,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:29,972 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-11 13:13:29,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:29,972 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-11 13:13:29,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:29,973 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:29,973 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:30,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-11 13:13:30,181 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:30,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:30,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-11 13:13:30,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:30,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357920319] [2020-10-11 13:13:30,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:30,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357920319] [2020-10-11 13:13:30,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115542645] [2020-10-11 13:13:30,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:30,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:30,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:30,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:30,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:30,373 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:30,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:30,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:13:30,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606947682] [2020-10-11 13:13:30,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:13:30,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:30,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:13:30,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:30,391 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-11 13:13:30,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:30,681 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-11 13:13:30,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:13:30,682 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:13:30,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:30,683 INFO L225 Difference]: With dead ends: 91 [2020-10-11 13:13:30,683 INFO L226 Difference]: Without dead ends: 85 [2020-10-11 13:13:30,683 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:13:30,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-11 13:13:30,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-11 13:13:30,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:13:30,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-11 13:13:30,686 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-11 13:13:30,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:30,687 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-11 13:13:30,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:13:30,687 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-11 13:13:30,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:30,687 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:30,687 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:30,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-11 13:13:30,896 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:30,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:30,896 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-11 13:13:30,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:30,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649550549] [2020-10-11 13:13:30,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:31,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649550549] [2020-10-11 13:13:31,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733367967] [2020-10-11 13:13:31,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:31,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 13:13:31,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:31,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:31,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:31,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:31,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-11 13:13:31,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987223635] [2020-10-11 13:13:31,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:31,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:31,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:31,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:31,061 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-11 13:13:31,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:31,329 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-11 13:13:31,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:13:31,330 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-11 13:13:31,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:31,331 INFO L225 Difference]: With dead ends: 88 [2020-10-11 13:13:31,331 INFO L226 Difference]: Without dead ends: 82 [2020-10-11 13:13:31,332 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:13:31,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-11 13:13:31,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-11 13:13:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:13:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-11 13:13:31,334 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-11 13:13:31,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:31,335 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-11 13:13:31,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:31,335 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-11 13:13:31,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:31,336 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:31,336 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:31,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:31,538 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:31,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:31,538 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-11 13:13:31,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:31,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671187321] [2020-10-11 13:13:31,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:31,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671187321] [2020-10-11 13:13:31,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924813678] [2020-10-11 13:13:31,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:31,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 13:13:31,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:31,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:31,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:31,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:31,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:31,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:13:31,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283003550] [2020-10-11 13:13:31,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:13:31,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:31,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:13:31,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:31,765 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-11 13:13:32,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:32,123 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-11 13:13:32,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:13:32,124 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:13:32,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:32,125 INFO L225 Difference]: With dead ends: 87 [2020-10-11 13:13:32,125 INFO L226 Difference]: Without dead ends: 81 [2020-10-11 13:13:32,125 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:13:32,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-11 13:13:32,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-11 13:13:32,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:13:32,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-11 13:13:32,128 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-11 13:13:32,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:32,128 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-11 13:13:32,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:13:32,129 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-11 13:13:32,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:32,129 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:32,129 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:32,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:32,330 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:32,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:32,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-11 13:13:32,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:32,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325166643] [2020-10-11 13:13:32,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:32,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:32,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325166643] [2020-10-11 13:13:32,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074923246] [2020-10-11 13:13:32,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:32,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:32,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:32,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:32,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-11 13:13:32,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449577117] [2020-10-11 13:13:32,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:32,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:32,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:32,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:32,499 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-11 13:13:32,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:32,814 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-11 13:13:32,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:32,815 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-11 13:13:32,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:32,816 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:13:32,816 INFO L226 Difference]: Without dead ends: 78 [2020-10-11 13:13:32,817 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:13:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-11 13:13:32,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-11 13:13:32,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:13:32,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-11 13:13:32,819 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-11 13:13:32,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:32,819 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-11 13:13:32,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-11 13:13:32,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:32,820 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:32,820 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:33,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-11 13:13:33,025 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:33,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:33,025 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-11 13:13:33,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:33,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345763148] [2020-10-11 13:13:33,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:33,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345763148] [2020-10-11 13:13:33,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102780196] [2020-10-11 13:13:33,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:33,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:33,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:33,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:33,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:33,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:33,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:33,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:13:33,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497443061] [2020-10-11 13:13:33,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:13:33,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:33,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:13:33,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:33,244 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-11 13:13:33,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:33,677 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-11 13:13:33,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:13:33,678 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:13:33,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:33,679 INFO L225 Difference]: With dead ends: 83 [2020-10-11 13:13:33,679 INFO L226 Difference]: Without dead ends: 77 [2020-10-11 13:13:33,679 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:13:33,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-11 13:13:33,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-11 13:13:33,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:13:33,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-11 13:13:33,683 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-11 13:13:33,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:33,683 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-11 13:13:33,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:13:33,683 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-11 13:13:33,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:33,684 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:33,684 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:33,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:33,894 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:33,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:33,895 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-11 13:13:33,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:33,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480224323] [2020-10-11 13:13:33,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:33,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480224323] [2020-10-11 13:13:33,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640387114] [2020-10-11 13:13:33,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:34,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-11 13:13:34,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:34,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:34,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:34,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:34,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-11 13:13:34,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032841143] [2020-10-11 13:13:34,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:34,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:34,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:34,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:34,109 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-11 13:13:34,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:34,452 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-11 13:13:34,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:13:34,453 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-11 13:13:34,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:34,453 INFO L225 Difference]: With dead ends: 80 [2020-10-11 13:13:34,454 INFO L226 Difference]: Without dead ends: 74 [2020-10-11 13:13:34,454 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:13:34,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-11 13:13:34,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-11 13:13:34,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:13:34,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-11 13:13:34,457 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-11 13:13:34,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:34,457 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-11 13:13:34,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:34,457 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-11 13:13:34,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:34,457 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:34,458 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:34,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-11 13:13:34,661 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:34,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:34,661 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-11 13:13:34,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:34,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678696785] [2020-10-11 13:13:34,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:34,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678696785] [2020-10-11 13:13:34,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761408817] [2020-10-11 13:13:34,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:34,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:34,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:34,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:34,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:34,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:34,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:34,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:13:34,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927959078] [2020-10-11 13:13:34,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:13:34,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:34,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:13:34,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:34,847 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-11 13:13:35,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:35,367 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-11 13:13:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:13:35,368 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:13:35,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:35,368 INFO L225 Difference]: With dead ends: 79 [2020-10-11 13:13:35,369 INFO L226 Difference]: Without dead ends: 73 [2020-10-11 13:13:35,369 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 13:13:35,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-11 13:13:35,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-11 13:13:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:13:35,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-11 13:13:35,371 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-11 13:13:35,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:35,371 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-11 13:13:35,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:13:35,372 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-11 13:13:35,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:35,372 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:35,372 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:35,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:35,576 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:35,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:35,576 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-11 13:13:35,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:35,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52248470] [2020-10-11 13:13:35,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:35,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52248470] [2020-10-11 13:13:35,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813082349] [2020-10-11 13:13:35,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:35,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 13:13:35,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:35,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:35,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:35,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:35,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-11 13:13:35,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685025791] [2020-10-11 13:13:35,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:35,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:35,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:35,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:35,742 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-11 13:13:36,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:36,157 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-11 13:13:36,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:13:36,157 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-11 13:13:36,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:36,158 INFO L225 Difference]: With dead ends: 95 [2020-10-11 13:13:36,158 INFO L226 Difference]: Without dead ends: 89 [2020-10-11 13:13:36,159 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 13:13:36,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-11 13:13:36,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-11 13:13:36,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 13:13:36,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-11 13:13:36,161 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-11 13:13:36,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:36,161 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-11 13:13:36,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:36,161 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-11 13:13:36,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:36,162 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:36,162 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:36,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-11 13:13:36,363 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:36,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:36,363 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-11 13:13:36,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:36,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365058734] [2020-10-11 13:13:36,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:36,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365058734] [2020-10-11 13:13:36,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268367847] [2020-10-11 13:13:36,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:36,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 13:13:36,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:36,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:36,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:36,529 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:36,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:36,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:13:36,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299101428] [2020-10-11 13:13:36,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:13:36,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:36,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:13:36,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:36,542 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-11 13:13:37,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:37,078 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-10-11 13:13:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:13:37,078 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:13:37,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:37,079 INFO L225 Difference]: With dead ends: 76 [2020-10-11 13:13:37,079 INFO L226 Difference]: Without dead ends: 68 [2020-10-11 13:13:37,080 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:13:37,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-11 13:13:37,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-11 13:13:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-11 13:13:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-11 13:13:37,082 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-11 13:13:37,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:37,083 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-11 13:13:37,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:13:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-11 13:13:37,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:37,083 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:37,083 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:37,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:37,291 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:37,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:37,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-11 13:13:37,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:37,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129112524] [2020-10-11 13:13:37,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:37,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:37,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129112524] [2020-10-11 13:13:37,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021601856] [2020-10-11 13:13:37,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:37,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:13:37,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:37,452 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:37,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:37,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:13:37,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113378074] [2020-10-11 13:13:37,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:13:37,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:37,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:13:37,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:37,466 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-11 13:13:37,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:37,949 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-11 13:13:37,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:13:37,949 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:13:37,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:37,950 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:13:37,950 INFO L226 Difference]: Without dead ends: 79 [2020-10-11 13:13:37,951 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:13:37,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-11 13:13:37,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-11 13:13:37,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 13:13:37,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-11 13:13:37,953 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-11 13:13:37,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:37,954 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-11 13:13:37,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:13:37,954 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-11 13:13:37,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:13:37,954 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:37,955 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:38,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-11 13:13:38,163 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:38,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:38,163 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-11 13:13:38,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:38,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573366241] [2020-10-11 13:13:38,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:38,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573366241] [2020-10-11 13:13:38,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415199079] [2020-10-11 13:13:38,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:38,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:38,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:38,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:38,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:38,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 13:13:38,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2020-10-11 13:13:38,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67403173] [2020-10-11 13:13:38,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:38,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:38,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:38,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:38,315 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 8 states. [2020-10-11 13:13:38,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:38,327 INFO L93 Difference]: Finished difference Result 151 states and 338 transitions. [2020-10-11 13:13:38,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 13:13:38,328 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-11 13:13:38,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:38,329 INFO L225 Difference]: With dead ends: 151 [2020-10-11 13:13:38,329 INFO L226 Difference]: Without dead ends: 50 [2020-10-11 13:13:38,329 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:38,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-11 13:13:38,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-11 13:13:38,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:38,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 100 transitions. [2020-10-11 13:13:38,332 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 100 transitions. Word has length 19 [2020-10-11 13:13:38,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:38,332 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 100 transitions. [2020-10-11 13:13:38,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:38,332 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 100 transitions. [2020-10-11 13:13:38,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:13:38,333 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:38,333 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:38,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-11 13:13:38,534 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:38,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:38,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-11 13:13:38,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:38,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522008] [2020-10-11 13:13:38,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:38,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522008] [2020-10-11 13:13:38,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223523392] [2020-10-11 13:13:38,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:38,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-11 13:13:38,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:38,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:38,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:38,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 13:13:38,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 21 [2020-10-11 13:13:38,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433861508] [2020-10-11 13:13:38,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:38,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:38,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:38,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:13:38,833 INFO L87 Difference]: Start difference. First operand 50 states and 100 transitions. Second operand 8 states. [2020-10-11 13:13:38,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:38,852 INFO L93 Difference]: Finished difference Result 86 states and 150 transitions. [2020-10-11 13:13:38,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 13:13:38,852 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-11 13:13:38,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:38,853 INFO L225 Difference]: With dead ends: 86 [2020-10-11 13:13:38,853 INFO L226 Difference]: Without dead ends: 0 [2020-10-11 13:13:38,853 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:13:38,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-11 13:13:38,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-11 13:13:38,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-11 13:13:38,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-11 13:13:38,854 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-10-11 13:13:38,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:38,854 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-11 13:13:38,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:38,854 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-11 13:13:38,855 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-11 13:13:39,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:39,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 01:13:39 BasicIcfg [2020-10-11 13:13:39,061 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 13:13:39,064 INFO L168 Benchmark]: Toolchain (without parser) took 46132.80 ms. Allocated memory was 252.2 MB in the beginning and 616.0 MB in the end (delta: 363.9 MB). Free memory was 206.5 MB in the beginning and 204.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 365.9 MB. Max. memory is 14.2 GB. [2020-10-11 13:13:39,065 INFO L168 Benchmark]: CDTParser took 1.37 ms. Allocated memory is still 252.2 MB. Free memory is still 228.6 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 13:13:39,065 INFO L168 Benchmark]: CACSL2BoogieTranslator took 743.07 ms. Allocated memory was 252.2 MB in the beginning and 315.6 MB in the end (delta: 63.4 MB). Free memory was 206.5 MB in the beginning and 271.5 MB in the end (delta: -65.1 MB). Peak memory consumption was 29.4 MB. Max. memory is 14.2 GB. [2020-10-11 13:13:39,066 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.59 ms. Allocated memory is still 315.6 MB. Free memory was 271.5 MB in the beginning and 269.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 13:13:39,066 INFO L168 Benchmark]: Boogie Preprocessor took 27.55 ms. Allocated memory is still 315.6 MB. Free memory was 269.0 MB in the beginning and 266.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 13:13:39,067 INFO L168 Benchmark]: RCFGBuilder took 364.01 ms. Allocated memory is still 315.6 MB. Free memory was 266.5 MB in the beginning and 247.2 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. [2020-10-11 13:13:39,067 INFO L168 Benchmark]: TraceAbstraction took 44933.18 ms. Allocated memory was 315.6 MB in the beginning and 616.0 MB in the end (delta: 300.4 MB). Free memory was 247.2 MB in the beginning and 204.5 MB in the end (delta: 42.7 MB). Peak memory consumption was 343.1 MB. Max. memory is 14.2 GB. [2020-10-11 13:13:39,070 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.37 ms. Allocated memory is still 252.2 MB. Free memory is still 228.6 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 743.07 ms. Allocated memory was 252.2 MB in the beginning and 315.6 MB in the end (delta: 63.4 MB). Free memory was 206.5 MB in the beginning and 271.5 MB in the end (delta: -65.1 MB). Peak memory consumption was 29.4 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 58.59 ms. Allocated memory is still 315.6 MB. Free memory was 271.5 MB in the beginning and 269.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 27.55 ms. Allocated memory is still 315.6 MB. Free memory was 269.0 MB in the beginning and 266.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 364.01 ms. Allocated memory is still 315.6 MB. Free memory was 266.5 MB in the beginning and 247.2 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 44933.18 ms. Allocated memory was 315.6 MB in the beginning and 616.0 MB in the end (delta: 300.4 MB). Free memory was 247.2 MB in the beginning and 204.5 MB in the end (delta: 42.7 MB). Peak memory consumption was 343.1 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 618 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.3s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - 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, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 44.7s, OverallIterations: 71, TraceHistogramMax: 6, AutomataDifference: 17.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 1144 SDtfs, 3049 SDslu, 4501 SDs, 0 SdLazy, 4778 SolverSat, 2192 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2335 GetRequests, 834 SyntacticMatches, 64 SemanticMatches, 1437 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6964 ImplicationChecksByTransitivity, 16.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 71 MinimizatonAttempts, 1147 StatesRemovedByMinimization, 68 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 7.2s InterpolantComputationTime, 2056 NumberOfCodeBlocks, 2056 NumberOfCodeBlocksAsserted, 254 NumberOfCheckSat, 1919 ConstructedInterpolants, 0 QuantifiedInterpolants, 118755 SizeOfPredicates, 456 NumberOfNonLiveVariables, 6614 ConjunctsInSsa, 728 ConjunctsInUnsatCore, 137 InterpolantComputations, 7 PerfectInterpolantSequences, 62/1440 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...