/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-1d1d2b5 [2020-10-21 21:34:06,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-21 21:34:06,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-21 21:34:06,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-21 21:34:06,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-21 21:34:06,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-21 21:34:06,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-21 21:34:06,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-21 21:34:06,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-21 21:34:06,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-21 21:34:06,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-21 21:34:06,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-21 21:34:06,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-21 21:34:06,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-21 21:34:06,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-21 21:34:06,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-21 21:34:06,629 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-21 21:34:06,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-21 21:34:06,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-21 21:34:06,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-21 21:34:06,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-21 21:34:06,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-21 21:34:06,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-21 21:34:06,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-21 21:34:06,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-21 21:34:06,657 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-21 21:34:06,657 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-21 21:34:06,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-21 21:34:06,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-21 21:34:06,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-21 21:34:06,668 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-21 21:34:06,669 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-21 21:34:06,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-21 21:34:06,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-21 21:34:06,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-21 21:34:06,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-21 21:34:06,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-21 21:34:06,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-21 21:34:06,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-21 21:34:06,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-21 21:34:06,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-21 21:34:06,680 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 [2020-10-21 21:34:06,715 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-21 21:34:06,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-21 21:34:06,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-21 21:34:06,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-21 21:34:06,718 INFO L138 SettingsManager]: * Use SBE=true [2020-10-21 21:34:06,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-21 21:34:06,719 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-21 21:34:06,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-21 21:34:06,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-21 21:34:06,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-21 21:34:06,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-21 21:34:06,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-21 21:34:06,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-21 21:34:06,721 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-21 21:34:06,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-21 21:34:06,722 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-21 21:34:06,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-21 21:34:06,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-21 21:34:06,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-21 21:34:06,723 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-21 21:34:06,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-21 21:34:06,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 21:34:06,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-21 21:34:06,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-21 21:34:06,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-21 21:34:06,724 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-21 21:34:06,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-21 21:34:06,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-21 21:34:06,725 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-21 21:34:06,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-21 21:34:07,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-21 21:34:07,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-21 21:34:07,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-21 21:34:07,034 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-21 21:34:07,034 INFO L275 PluginConnector]: CDTParser initialized [2020-10-21 21:34:07,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-21 21:34:07,103 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/accfbd8b4/fc017fa3a52d4d58a327cbfa7df283ec/FLAG451ef3358 [2020-10-21 21:34:07,617 INFO L306 CDTParser]: Found 1 translation units. [2020-10-21 21:34:07,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-21 21:34:07,635 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/accfbd8b4/fc017fa3a52d4d58a327cbfa7df283ec/FLAG451ef3358 [2020-10-21 21:34:07,891 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/accfbd8b4/fc017fa3a52d4d58a327cbfa7df283ec [2020-10-21 21:34:07,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-21 21:34:07,908 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-21 21:34:07,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-21 21:34:07,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-21 21:34:07,916 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-21 21:34:07,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 09:34:07" (1/1) ... [2020-10-21 21:34:07,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52823cfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:07, skipping insertion in model container [2020-10-21 21:34:07,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 09:34:07" (1/1) ... [2020-10-21 21:34:07,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-21 21:34:07,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-21 21:34:08,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 21:34:08,605 INFO L203 MainTranslator]: Completed pre-run [2020-10-21 21:34:08,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 21:34:08,745 INFO L208 MainTranslator]: Completed translation [2020-10-21 21:34:08,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:08 WrapperNode [2020-10-21 21:34:08,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-21 21:34:08,747 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-21 21:34:08,747 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-21 21:34:08,747 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-21 21:34:08,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:08" (1/1) ... [2020-10-21 21:34:08,770 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:08" (1/1) ... [2020-10-21 21:34:08,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-21 21:34:08,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-21 21:34:08,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-21 21:34:08,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-21 21:34:08,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:08" (1/1) ... [2020-10-21 21:34:08,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:08" (1/1) ... [2020-10-21 21:34:08,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:08" (1/1) ... [2020-10-21 21:34:08,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:08" (1/1) ... [2020-10-21 21:34:08,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:08" (1/1) ... [2020-10-21 21:34:08,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:08" (1/1) ... [2020-10-21 21:34:08,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:08" (1/1) ... [2020-10-21 21:34:08,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-21 21:34:08,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-21 21:34:08,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-21 21:34:08,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-21 21:34:08,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:08" (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 [2020-10-21 21:34:08,883 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-21 21:34:08,883 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-21 21:34:08,883 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-21 21:34:08,883 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-21 21:34:08,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-21 21:34:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-21 21:34:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-21 21:34:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-21 21:34:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-21 21:34:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-21 21:34:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-21 21:34:08,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-21 21:34:08,886 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-21 21:34:09,232 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-21 21:34:09,233 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-21 21:34:09,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 09:34:09 BoogieIcfgContainer [2020-10-21 21:34:09,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-21 21:34:09,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-21 21:34:09,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-21 21:34:09,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-21 21:34:09,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 09:34:07" (1/3) ... [2020-10-21 21:34:09,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ead8432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 09:34:09, skipping insertion in model container [2020-10-21 21:34:09,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:34:08" (2/3) ... [2020-10-21 21:34:09,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ead8432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 09:34:09, skipping insertion in model container [2020-10-21 21:34:09,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 09:34:09" (3/3) ... [2020-10-21 21:34:09,245 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-10-21 21:34:09,258 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-21 21:34:09,258 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-21 21:34:09,264 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-21 21:34:09,265 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-21 21:34:09,294 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,295 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,295 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,295 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,296 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,297 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,297 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,297 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,297 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,298 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,298 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,299 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,299 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,299 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,300 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,300 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,300 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,300 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,301 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,301 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,302 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,302 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,302 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,303 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,303 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,304 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,304 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,304 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,308 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,309 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,309 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,309 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,310 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,310 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,317 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,317 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,318 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,318 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,318 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,318 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:34:09,329 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-21 21:34:09,344 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-21 21:34:09,367 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-21 21:34:09,368 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-21 21:34:09,368 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-21 21:34:09,368 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-21 21:34:09,368 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-21 21:34:09,369 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-21 21:34:09,369 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-21 21:34:09,369 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-21 21:34:09,383 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-21 21:34:09,385 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-21 21:34:09,389 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-21 21:34:09,391 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-10-21 21:34:09,435 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-10-21 21:34:09,435 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-21 21:34:09,440 INFO L80 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-10-21 21:34:09,443 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-10-21 21:34:10,812 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-21 21:34:11,263 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-21 21:34:11,388 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-21 21:34:11,443 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-10-21 21:34:11,443 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-10-21 21:34:11,450 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-21 21:34:11,462 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-21 21:34:11,464 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-21 21:34:11,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-21 21:34:11,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:11,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-21 21:34:11,472 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:11,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:11,478 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-10-21 21:34:11,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:11,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544754704] [2020-10-21 21:34:11,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:11,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544754704] [2020-10-21 21:34:11,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:34:11,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-21 21:34:11,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792598194] [2020-10-21 21:34:11,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-21 21:34:11,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:11,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-21 21:34:11,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-21 21:34:11,743 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-21 21:34:11,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:11,831 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-21 21:34:11,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-21 21:34:11,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-21 21:34:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:11,846 INFO L225 Difference]: With dead ends: 75 [2020-10-21 21:34:11,847 INFO L226 Difference]: Without dead ends: 42 [2020-10-21 21:34:11,849 INFO L677 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 [2020-10-21 21:34:11,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-21 21:34:11,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-21 21:34:11,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-21 21:34:11,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-21 21:34:11,889 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-21 21:34:11,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:11,889 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-21 21:34:11,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-21 21:34:11,890 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-21 21:34:11,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 21:34:11,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:11,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:11,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-21 21:34:11,892 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:11,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:11,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-10-21 21:34:11,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:11,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053267198] [2020-10-21 21:34:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:12,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053267198] [2020-10-21 21:34:12,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:34:12,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 21:34:12,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531458477] [2020-10-21 21:34:12,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-21 21:34:12,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:12,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-21 21:34:12,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-21 21:34:12,024 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-21 21:34:12,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:12,083 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-21 21:34:12,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-21 21:34:12,083 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-21 21:34:12,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:12,085 INFO L225 Difference]: With dead ends: 56 [2020-10-21 21:34:12,085 INFO L226 Difference]: Without dead ends: 50 [2020-10-21 21:34:12,086 INFO L677 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 [2020-10-21 21:34:12,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-21 21:34:12,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-21 21:34:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-21 21:34:12,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-21 21:34:12,095 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-21 21:34:12,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:12,096 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-21 21:34:12,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-21 21:34:12,096 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-21 21:34:12,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:34:12,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:12,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:12,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-21 21:34:12,098 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:12,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:12,098 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-10-21 21:34:12,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:12,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916968036] [2020-10-21 21:34:12,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:12,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916968036] [2020-10-21 21:34:12,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:34:12,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 21:34:12,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236077848] [2020-10-21 21:34:12,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 21:34:12,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:12,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 21:34:12,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-21 21:34:12,193 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-21 21:34:12,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:12,311 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-10-21 21:34:12,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 21:34:12,312 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 21:34:12,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:12,314 INFO L225 Difference]: With dead ends: 54 [2020-10-21 21:34:12,315 INFO L226 Difference]: Without dead ends: 47 [2020-10-21 21:34:12,315 INFO L677 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 [2020-10-21 21:34:12,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-21 21:34:12,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-21 21:34:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-21 21:34:12,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-10-21 21:34:12,323 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-10-21 21:34:12,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:12,324 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-10-21 21:34:12,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 21:34:12,324 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-10-21 21:34:12,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:34:12,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:12,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:12,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-21 21:34:12,326 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:12,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:12,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2101929440, now seen corresponding path program 2 times [2020-10-21 21:34:12,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:12,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650766512] [2020-10-21 21:34:12,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:12,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650766512] [2020-10-21 21:34:12,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:34:12,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 21:34:12,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988340788] [2020-10-21 21:34:12,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 21:34:12,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:12,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 21:34:12,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-21 21:34:12,394 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-10-21 21:34:12,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:12,484 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2020-10-21 21:34:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 21:34:12,489 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 21:34:12,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:12,491 INFO L225 Difference]: With dead ends: 59 [2020-10-21 21:34:12,491 INFO L226 Difference]: Without dead ends: 53 [2020-10-21 21:34:12,492 INFO L677 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 [2020-10-21 21:34:12,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-21 21:34:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2020-10-21 21:34:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 21:34:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 96 transitions. [2020-10-21 21:34:12,499 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 96 transitions. Word has length 10 [2020-10-21 21:34:12,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:12,499 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 96 transitions. [2020-10-21 21:34:12,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 21:34:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 96 transitions. [2020-10-21 21:34:12,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:34:12,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:12,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:12,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-21 21:34:12,501 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:12,501 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 3 times [2020-10-21 21:34:12,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:12,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506767459] [2020-10-21 21:34:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:12,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506767459] [2020-10-21 21:34:12,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:34:12,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 21:34:12,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255493679] [2020-10-21 21:34:12,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 21:34:12,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:12,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 21:34:12,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-21 21:34:12,569 INFO L87 Difference]: Start difference. First operand 41 states and 96 transitions. Second operand 6 states. [2020-10-21 21:34:12,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:12,647 INFO L93 Difference]: Finished difference Result 65 states and 152 transitions. [2020-10-21 21:34:12,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 21:34:12,648 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 21:34:12,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:12,649 INFO L225 Difference]: With dead ends: 65 [2020-10-21 21:34:12,649 INFO L226 Difference]: Without dead ends: 52 [2020-10-21 21:34:12,649 INFO L677 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 [2020-10-21 21:34:12,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-21 21:34:12,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2020-10-21 21:34:12,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 21:34:12,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-10-21 21:34:12,656 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-10-21 21:34:12,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:12,656 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-10-21 21:34:12,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 21:34:12,657 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-10-21 21:34:12,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:34:12,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:12,658 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:12,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-21 21:34:12,658 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:12,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:12,659 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 4 times [2020-10-21 21:34:12,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:12,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098423722] [2020-10-21 21:34:12,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:12,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098423722] [2020-10-21 21:34:12,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23863269] [2020-10-21 21:34:12,730 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 [2020-10-21 21:34:12,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:34:12,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:12,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 21:34:12,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:12,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:12,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:12,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-21 21:34:12,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726191596] [2020-10-21 21:34:12,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 21:34:12,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:12,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 21:34:12,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-21 21:34:12,882 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-10-21 21:34:13,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:13,058 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-10-21 21:34:13,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:34:13,059 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-21 21:34:13,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:13,060 INFO L225 Difference]: With dead ends: 63 [2020-10-21 21:34:13,060 INFO L226 Difference]: Without dead ends: 54 [2020-10-21 21:34:13,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:34:13,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-21 21:34:13,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-10-21 21:34:13,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-21 21:34:13,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-10-21 21:34:13,065 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-10-21 21:34:13,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:13,079 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-10-21 21:34:13,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 21:34:13,079 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-10-21 21:34:13,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:34:13,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:13,080 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:13,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-21 21:34:13,290 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:13,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:13,291 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 5 times [2020-10-21 21:34:13,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:13,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485750844] [2020-10-21 21:34:13,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:13,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485750844] [2020-10-21 21:34:13,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123132727] [2020-10-21 21:34:13,394 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 [2020-10-21 21:34:13,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:13,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:13,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 21:34:13,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:13,471 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:13,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:13,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:13,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-21 21:34:13,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896342435] [2020-10-21 21:34:13,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 21:34:13,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:13,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 21:34:13,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-21 21:34:13,489 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 8 states. [2020-10-21 21:34:13,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:13,606 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-10-21 21:34:13,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-21 21:34:13,607 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-21 21:34:13,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:13,608 INFO L225 Difference]: With dead ends: 56 [2020-10-21 21:34:13,608 INFO L226 Difference]: Without dead ends: 51 [2020-10-21 21:34:13,609 INFO L677 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 [2020-10-21 21:34:13,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-21 21:34:13,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-10-21 21:34:13,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-21 21:34:13,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-21 21:34:13,614 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-21 21:34:13,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:13,615 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-21 21:34:13,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 21:34:13,615 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-21 21:34:13,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:34:13,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:13,616 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:13,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:13,829 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:13,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 6 times [2020-10-21 21:34:13,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:13,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037436901] [2020-10-21 21:34:13,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:13,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037436901] [2020-10-21 21:34:13,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790480075] [2020-10-21 21:34:13,913 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 [2020-10-21 21:34:13,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 21:34:13,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:13,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:34:13,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:13,977 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:14,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:14,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-21 21:34:14,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74065289] [2020-10-21 21:34:14,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 21:34:14,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:14,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 21:34:14,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-21 21:34:14,006 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-21 21:34:14,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:14,121 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-10-21 21:34:14,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 21:34:14,122 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-21 21:34:14,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:14,123 INFO L225 Difference]: With dead ends: 56 [2020-10-21 21:34:14,123 INFO L226 Difference]: Without dead ends: 50 [2020-10-21 21:34:14,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:34:14,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-21 21:34:14,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-10-21 21:34:14,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-21 21:34:14,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-21 21:34:14,129 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-10-21 21:34:14,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:14,129 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-21 21:34:14,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 21:34:14,129 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-21 21:34:14,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:34:14,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:14,130 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:14,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:14,342 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:14,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:14,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 7 times [2020-10-21 21:34:14,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:14,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430450896] [2020-10-21 21:34:14,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:14,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430450896] [2020-10-21 21:34:14,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839564059] [2020-10-21 21:34:14,405 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 [2020-10-21 21:34:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:14,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:34:14,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:14,492 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:14,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:14,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-21 21:34:14,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019253598] [2020-10-21 21:34:14,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 21:34:14,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:14,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 21:34:14,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:34:14,511 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-10-21 21:34:14,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:14,709 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-10-21 21:34:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-21 21:34:14,710 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-21 21:34:14,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:14,711 INFO L225 Difference]: With dead ends: 63 [2020-10-21 21:34:14,711 INFO L226 Difference]: Without dead ends: 58 [2020-10-21 21:34:14,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-21 21:34:14,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-21 21:34:14,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-10-21 21:34:14,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 21:34:14,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-21 21:34:14,717 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 12 [2020-10-21 21:34:14,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:14,717 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-21 21:34:14,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 21:34:14,718 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-21 21:34:14,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:34:14,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:14,718 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:14,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:14,923 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:14,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:14,923 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 8 times [2020-10-21 21:34:14,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:14,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821910195] [2020-10-21 21:34:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:15,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821910195] [2020-10-21 21:34:15,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436014884] [2020-10-21 21:34:15,039 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 [2020-10-21 21:34:15,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:15,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:15,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:34:15,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:15,148 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:15,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:15,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-21 21:34:15,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809634900] [2020-10-21 21:34:15,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 21:34:15,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:15,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 21:34:15,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:34:15,170 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-10-21 21:34:15,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:15,366 INFO L93 Difference]: Finished difference Result 71 states and 167 transitions. [2020-10-21 21:34:15,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:34:15,366 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-21 21:34:15,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:15,367 INFO L225 Difference]: With dead ends: 71 [2020-10-21 21:34:15,367 INFO L226 Difference]: Without dead ends: 62 [2020-10-21 21:34:15,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-21 21:34:15,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-21 21:34:15,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-10-21 21:34:15,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-21 21:34:15,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-21 21:34:15,373 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-10-21 21:34:15,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:15,373 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-21 21:34:15,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 21:34:15,373 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-21 21:34:15,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:34:15,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:15,374 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:15,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-21 21:34:15,576 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:15,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:15,576 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 9 times [2020-10-21 21:34:15,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:15,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824888065] [2020-10-21 21:34:15,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:15,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824888065] [2020-10-21 21:34:15,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598930824] [2020-10-21 21:34:15,675 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 [2020-10-21 21:34:15,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 21:34:15,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:15,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:34:15,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:15,788 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:15,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:15,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-21 21:34:15,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760105188] [2020-10-21 21:34:15,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 21:34:15,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:15,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 21:34:15,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-21 21:34:15,813 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-21 21:34:16,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:16,064 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-10-21 21:34:16,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:34:16,064 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-21 21:34:16,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:16,065 INFO L225 Difference]: With dead ends: 72 [2020-10-21 21:34:16,066 INFO L226 Difference]: Without dead ends: 63 [2020-10-21 21:34:16,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:34:16,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-21 21:34:16,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-10-21 21:34:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 21:34:16,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-21 21:34:16,072 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-10-21 21:34:16,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:16,072 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-21 21:34:16,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 21:34:16,073 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-21 21:34:16,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:34:16,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:16,077 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:16,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:16,290 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:16,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:16,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 10 times [2020-10-21 21:34:16,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:16,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391447179] [2020-10-21 21:34:16,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:16,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391447179] [2020-10-21 21:34:16,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535204103] [2020-10-21 21:34:16,354 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 [2020-10-21 21:34:16,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:34:16,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:16,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:34:16,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:16,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:16,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:16,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-21 21:34:16,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979422109] [2020-10-21 21:34:16,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 21:34:16,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:16,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 21:34:16,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-21 21:34:16,450 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 10 states. [2020-10-21 21:34:16,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:16,673 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-21 21:34:16,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-21 21:34:16,675 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-21 21:34:16,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:16,676 INFO L225 Difference]: With dead ends: 64 [2020-10-21 21:34:16,676 INFO L226 Difference]: Without dead ends: 59 [2020-10-21 21:34:16,677 INFO L677 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 [2020-10-21 21:34:16,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-21 21:34:16,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-10-21 21:34:16,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-21 21:34:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-21 21:34:16,681 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-21 21:34:16,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:16,682 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-21 21:34:16,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 21:34:16,682 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-21 21:34:16,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 21:34:16,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:16,683 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:16,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:16,895 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:16,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:16,896 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 11 times [2020-10-21 21:34:16,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:16,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389662035] [2020-10-21 21:34:16,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:16,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389662035] [2020-10-21 21:34:16,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183568016] [2020-10-21 21:34:16,988 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 [2020-10-21 21:34:17,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 21:34:17,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:17,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 21:34:17,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:17,045 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:17,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:17,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-21 21:34:17,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12411596] [2020-10-21 21:34:17,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 21:34:17,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:17,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 21:34:17,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-21 21:34:17,060 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-21 21:34:17,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:17,213 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-10-21 21:34:17,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:34:17,214 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-21 21:34:17,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:17,215 INFO L225 Difference]: With dead ends: 64 [2020-10-21 21:34:17,215 INFO L226 Difference]: Without dead ends: 58 [2020-10-21 21:34:17,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:34:17,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-21 21:34:17,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-21 21:34:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-21 21:34:17,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-21 21:34:17,222 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-10-21 21:34:17,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:17,222 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-21 21:34:17,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 21:34:17,222 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-21 21:34:17,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 21:34:17,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:17,223 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:17,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-21 21:34:17,434 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:17,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:17,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 12 times [2020-10-21 21:34:17,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:17,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647599361] [2020-10-21 21:34:17,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:17,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647599361] [2020-10-21 21:34:17,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000400717] [2020-10-21 21:34:17,535 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 [2020-10-21 21:34:17,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 21:34:17,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:17,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:34:17,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:17,616 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:17,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:17,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-21 21:34:17,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103407872] [2020-10-21 21:34:17,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:34:17,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:17,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:34:17,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:34:17,627 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-10-21 21:34:17,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:17,930 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-21 21:34:17,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-21 21:34:17,930 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-21 21:34:17,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:17,931 INFO L225 Difference]: With dead ends: 73 [2020-10-21 21:34:17,931 INFO L226 Difference]: Without dead ends: 68 [2020-10-21 21:34:17,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-21 21:34:17,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-21 21:34:17,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-10-21 21:34:17,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-21 21:34:17,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-21 21:34:17,935 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 14 [2020-10-21 21:34:17,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:17,936 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-21 21:34:17,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:34:17,936 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-21 21:34:17,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 21:34:17,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:17,937 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:18,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:18,149 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:18,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:18,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 13 times [2020-10-21 21:34:18,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:18,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368895547] [2020-10-21 21:34:18,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:18,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:18,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368895547] [2020-10-21 21:34:18,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557356883] [2020-10-21 21:34:18,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:34:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:18,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:34:18,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:18,303 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:18,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:18,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-21 21:34:18,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931351249] [2020-10-21 21:34:18,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:34:18,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:18,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:34:18,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:34:18,316 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-10-21 21:34:18,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:18,622 INFO L93 Difference]: Finished difference Result 81 states and 191 transitions. [2020-10-21 21:34:18,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 21:34:18,623 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-21 21:34:18,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:18,624 INFO L225 Difference]: With dead ends: 81 [2020-10-21 21:34:18,624 INFO L226 Difference]: Without dead ends: 72 [2020-10-21 21:34:18,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-10-21 21:34:18,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-21 21:34:18,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-21 21:34:18,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-21 21:34:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-21 21:34:18,635 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-10-21 21:34:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:18,635 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-21 21:34:18,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:34:18,635 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-21 21:34:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-21 21:34:18,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:18,636 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:18,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-21 21:34:18,837 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:18,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:18,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 14 times [2020-10-21 21:34:18,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:18,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063978360] [2020-10-21 21:34:18,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:18,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063978360] [2020-10-21 21:34:18,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076830840] [2020-10-21 21:34:18,922 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 [2020-10-21 21:34:18,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:18,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:18,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 21:34:18,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:19,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:19,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:19,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-21 21:34:19,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246920492] [2020-10-21 21:34:19,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 21:34:19,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:19,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 21:34:19,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-21 21:34:19,023 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-21 21:34:19,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:19,397 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-10-21 21:34:19,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 21:34:19,398 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-21 21:34:19,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:19,399 INFO L225 Difference]: With dead ends: 82 [2020-10-21 21:34:19,399 INFO L226 Difference]: Without dead ends: 73 [2020-10-21 21:34:19,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-21 21:34:19,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-21 21:34:19,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-10-21 21:34:19,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-21 21:34:19,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-21 21:34:19,403 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-10-21 21:34:19,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:19,404 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-21 21:34:19,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 21:34:19,404 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-21 21:34:19,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-21 21:34:19,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:19,405 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:19,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-21 21:34:19,609 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:19,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:19,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 15 times [2020-10-21 21:34:19,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:19,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737448713] [2020-10-21 21:34:19,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:19,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737448713] [2020-10-21 21:34:19,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178750925] [2020-10-21 21:34:19,693 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 [2020-10-21 21:34:19,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-21 21:34:19,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:19,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 21:34:19,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:19,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:19,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:19,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-21 21:34:19,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183259799] [2020-10-21 21:34:19,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 21:34:19,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:19,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 21:34:19,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-21 21:34:19,857 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 12 states. [2020-10-21 21:34:20,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:20,158 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-10-21 21:34:20,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-21 21:34:20,159 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-21 21:34:20,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:20,160 INFO L225 Difference]: With dead ends: 72 [2020-10-21 21:34:20,160 INFO L226 Difference]: Without dead ends: 67 [2020-10-21 21:34:20,161 INFO L677 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 [2020-10-21 21:34:20,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-21 21:34:20,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-10-21 21:34:20,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-21 21:34:20,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-21 21:34:20,164 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-21 21:34:20,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:20,164 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-21 21:34:20,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 21:34:20,165 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-21 21:34:20,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 21:34:20,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:20,165 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:20,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-21 21:34:20,374 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:20,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:20,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 16 times [2020-10-21 21:34:20,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:20,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568792204] [2020-10-21 21:34:20,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:20,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568792204] [2020-10-21 21:34:20,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573287410] [2020-10-21 21:34:20,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:34:20,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:34:20,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:20,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-21 21:34:20,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:20,555 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:20,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:20,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-21 21:34:20,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529695529] [2020-10-21 21:34:20,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 21:34:20,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:20,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 21:34:20,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-21 21:34:20,568 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-21 21:34:20,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:20,772 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-10-21 21:34:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:34:20,773 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-21 21:34:20,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:20,774 INFO L225 Difference]: With dead ends: 72 [2020-10-21 21:34:20,774 INFO L226 Difference]: Without dead ends: 66 [2020-10-21 21:34:20,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:34:20,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-21 21:34:20,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-10-21 21:34:20,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-21 21:34:20,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-21 21:34:20,778 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-10-21 21:34:20,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:20,779 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-21 21:34:20,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 21:34:20,779 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-21 21:34:20,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 21:34:20,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:20,780 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:20,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-21 21:34:20,990 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:20,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:20,990 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 17 times [2020-10-21 21:34:20,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:20,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672931151] [2020-10-21 21:34:20,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:21,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672931151] [2020-10-21 21:34:21,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788578339] [2020-10-21 21:34:21,075 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 [2020-10-21 21:34:21,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-21 21:34:21,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:21,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 21:34:21,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:21,148 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:21,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:21,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:21,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-21 21:34:21,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235438060] [2020-10-21 21:34:21,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:34:21,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:21,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:34:21,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:34:21,167 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-10-21 21:34:21,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:21,583 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-21 21:34:21,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-21 21:34:21,584 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-21 21:34:21,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:21,585 INFO L225 Difference]: With dead ends: 83 [2020-10-21 21:34:21,585 INFO L226 Difference]: Without dead ends: 78 [2020-10-21 21:34:21,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-21 21:34:21,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-21 21:34:21,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2020-10-21 21:34:21,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-21 21:34:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-21 21:34:21,589 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 16 [2020-10-21 21:34:21,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:21,589 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-21 21:34:21,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:34:21,589 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-21 21:34:21,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 21:34:21,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:21,590 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:21,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:21,801 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:21,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:21,801 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 18 times [2020-10-21 21:34:21,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:21,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194394924] [2020-10-21 21:34:21,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:21,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194394924] [2020-10-21 21:34:21,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723094784] [2020-10-21 21:34:21,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:34:21,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-21 21:34:21,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:21,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 21:34:21,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:22,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:22,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:22,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-21 21:34:22,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936467790] [2020-10-21 21:34:22,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:34:22,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:22,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:34:22,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:34:22,042 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-10-21 21:34:22,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:22,443 INFO L93 Difference]: Finished difference Result 91 states and 215 transitions. [2020-10-21 21:34:22,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 21:34:22,444 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-21 21:34:22,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:22,445 INFO L225 Difference]: With dead ends: 91 [2020-10-21 21:34:22,446 INFO L226 Difference]: Without dead ends: 82 [2020-10-21 21:34:22,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-21 21:34:22,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-21 21:34:22,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-10-21 21:34:22,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-21 21:34:22,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-21 21:34:22,451 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-10-21 21:34:22,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:22,451 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-21 21:34:22,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:34:22,452 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-21 21:34:22,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-21 21:34:22,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:22,454 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:22,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:22,663 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:22,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:22,663 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 19 times [2020-10-21 21:34:22,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:22,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136539190] [2020-10-21 21:34:22,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:22,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136539190] [2020-10-21 21:34:22,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557710493] [2020-10-21 21:34:22,746 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 [2020-10-21 21:34:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:22,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-21 21:34:22,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:22,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:22,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:22,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-21 21:34:22,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038404715] [2020-10-21 21:34:22,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 21:34:22,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:22,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 21:34:22,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-21 21:34:22,844 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-21 21:34:23,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:23,327 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-21 21:34:23,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 21:34:23,328 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-21 21:34:23,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:23,328 INFO L225 Difference]: With dead ends: 92 [2020-10-21 21:34:23,329 INFO L226 Difference]: Without dead ends: 83 [2020-10-21 21:34:23,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 21:34:23,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-21 21:34:23,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-10-21 21:34:23,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-21 21:34:23,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-21 21:34:23,332 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-10-21 21:34:23,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:23,334 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-21 21:34:23,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 21:34:23,334 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-21 21:34:23,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-21 21:34:23,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:23,335 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:23,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:23,536 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:23,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:23,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 20 times [2020-10-21 21:34:23,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:23,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129917037] [2020-10-21 21:34:23,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:23,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129917037] [2020-10-21 21:34:23,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764914014] [2020-10-21 21:34:23,652 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 [2020-10-21 21:34:23,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:23,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:23,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-21 21:34:23,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:23,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:23,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:23,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-21 21:34:23,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268647203] [2020-10-21 21:34:23,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 21:34:23,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:23,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 21:34:23,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-21 21:34:23,827 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 14 states. [2020-10-21 21:34:24,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:24,296 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-10-21 21:34:24,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-21 21:34:24,296 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-21 21:34:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:24,298 INFO L225 Difference]: With dead ends: 80 [2020-10-21 21:34:24,298 INFO L226 Difference]: Without dead ends: 75 [2020-10-21 21:34:24,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-21 21:34:24,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-21 21:34:24,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-10-21 21:34:24,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-21 21:34:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-21 21:34:24,305 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-21 21:34:24,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:24,305 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-21 21:34:24,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 21:34:24,305 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-21 21:34:24,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 21:34:24,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:24,306 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:24,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-21 21:34:24,517 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:24,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:24,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 21 times [2020-10-21 21:34:24,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:24,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232645895] [2020-10-21 21:34:24,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:24,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232645895] [2020-10-21 21:34:24,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779127092] [2020-10-21 21:34:24,663 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 [2020-10-21 21:34:24,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-21 21:34:24,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:24,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-21 21:34:24,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:24,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:24,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:24,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-21 21:34:24,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794950455] [2020-10-21 21:34:24,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 21:34:24,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:24,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 21:34:24,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-21 21:34:24,740 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-21 21:34:24,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:24,999 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-21 21:34:24,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:34:24,999 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-21 21:34:25,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:25,001 INFO L225 Difference]: With dead ends: 80 [2020-10-21 21:34:25,001 INFO L226 Difference]: Without dead ends: 74 [2020-10-21 21:34:25,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:34:25,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-21 21:34:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-10-21 21:34:25,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-21 21:34:25,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-21 21:34:25,004 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-10-21 21:34:25,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:25,005 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-21 21:34:25,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 21:34:25,005 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-21 21:34:25,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 21:34:25,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:25,006 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:25,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-21 21:34:25,215 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:25,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:25,215 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 22 times [2020-10-21 21:34:25,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:25,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040253950] [2020-10-21 21:34:25,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:25,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040253950] [2020-10-21 21:34:25,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988579053] [2020-10-21 21:34:25,324 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 [2020-10-21 21:34:25,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:34:25,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:25,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-21 21:34:25,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:25,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:25,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:25,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-21 21:34:25,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051282366] [2020-10-21 21:34:25,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:34:25,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:25,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:34:25,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:34:25,430 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-10-21 21:34:25,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:25,946 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-21 21:34:25,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-21 21:34:25,946 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-21 21:34:25,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:25,947 INFO L225 Difference]: With dead ends: 93 [2020-10-21 21:34:25,947 INFO L226 Difference]: Without dead ends: 88 [2020-10-21 21:34:25,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 21:34:25,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-21 21:34:25,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 53. [2020-10-21 21:34:25,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-21 21:34:25,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-10-21 21:34:25,951 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 18 [2020-10-21 21:34:25,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:25,951 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-10-21 21:34:25,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:34:25,951 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-10-21 21:34:25,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 21:34:25,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:25,952 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:26,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-21 21:34:26,160 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:26,160 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 23 times [2020-10-21 21:34:26,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:26,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832583782] [2020-10-21 21:34:26,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:26,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832583782] [2020-10-21 21:34:26,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901637431] [2020-10-21 21:34:26,262 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 [2020-10-21 21:34:26,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-21 21:34:26,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:26,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-21 21:34:26,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:26,349 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:26,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:26,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-21 21:34:26,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315586699] [2020-10-21 21:34:26,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:34:26,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:26,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:34:26,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:34:26,367 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-10-21 21:34:26,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:26,947 INFO L93 Difference]: Finished difference Result 101 states and 239 transitions. [2020-10-21 21:34:26,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 21:34:26,947 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-21 21:34:26,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:26,948 INFO L225 Difference]: With dead ends: 101 [2020-10-21 21:34:26,948 INFO L226 Difference]: Without dead ends: 92 [2020-10-21 21:34:26,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 21:34:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-21 21:34:26,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-21 21:34:26,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-21 21:34:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-21 21:34:26,953 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 18 [2020-10-21 21:34:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:26,953 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-21 21:34:26,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:34:26,953 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-21 21:34:26,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-21 21:34:26,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:26,954 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:27,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-21 21:34:27,164 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:27,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:27,164 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 24 times [2020-10-21 21:34:27,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:27,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811560666] [2020-10-21 21:34:27,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:27,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811560666] [2020-10-21 21:34:27,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662377505] [2020-10-21 21:34:27,283 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 [2020-10-21 21:34:27,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-21 21:34:27,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:27,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-21 21:34:27,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:27,429 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:27,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:27,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-21 21:34:27,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794911563] [2020-10-21 21:34:27,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 21:34:27,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:27,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 21:34:27,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-21 21:34:27,442 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-21 21:34:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:28,059 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-10-21 21:34:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 21:34:28,059 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-21 21:34:28,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:28,061 INFO L225 Difference]: With dead ends: 102 [2020-10-21 21:34:28,061 INFO L226 Difference]: Without dead ends: 93 [2020-10-21 21:34:28,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-10-21 21:34:28,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-21 21:34:28,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-10-21 21:34:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-21 21:34:28,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-10-21 21:34:28,064 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 19 [2020-10-21 21:34:28,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:28,064 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-10-21 21:34:28,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 21:34:28,064 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-10-21 21:34:28,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-21 21:34:28,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:28,065 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:28,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-21 21:34:28,270 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:28,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:28,270 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 25 times [2020-10-21 21:34:28,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:28,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388263296] [2020-10-21 21:34:28,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:28,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388263296] [2020-10-21 21:34:28,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439718814] [2020-10-21 21:34:28,402 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 [2020-10-21 21:34:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:28,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-21 21:34:28,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:28,497 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:28,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:28,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-21 21:34:28,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495029147] [2020-10-21 21:34:28,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 21:34:28,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:28,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 21:34:28,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-21 21:34:28,513 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 16 states. [2020-10-21 21:34:29,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:29,075 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-10-21 21:34:29,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-21 21:34:29,075 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-21 21:34:29,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:29,076 INFO L225 Difference]: With dead ends: 88 [2020-10-21 21:34:29,076 INFO L226 Difference]: Without dead ends: 83 [2020-10-21 21:34:29,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-21 21:34:29,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-21 21:34:29,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-10-21 21:34:29,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-21 21:34:29,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-21 21:34:29,080 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-21 21:34:29,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:29,080 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-21 21:34:29,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 21:34:29,080 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-21 21:34:29,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-21 21:34:29,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:29,081 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:29,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:29,286 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:29,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:29,286 INFO L82 PathProgramCache]: Analyzing trace with hash -923845315, now seen corresponding path program 26 times [2020-10-21 21:34:29,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:29,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128341719] [2020-10-21 21:34:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:29,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128341719] [2020-10-21 21:34:29,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399868022] [2020-10-21 21:34:29,471 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 [2020-10-21 21:34:29,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:29,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:29,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-21 21:34:29,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:29,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:29,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:29,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-21 21:34:29,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237806714] [2020-10-21 21:34:29,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 21:34:29,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:29,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 21:34:29,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-21 21:34:29,538 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-21 21:34:29,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:29,846 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-10-21 21:34:29,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 21:34:29,846 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-21 21:34:29,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:29,847 INFO L225 Difference]: With dead ends: 88 [2020-10-21 21:34:29,847 INFO L226 Difference]: Without dead ends: 82 [2020-10-21 21:34:29,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2020-10-21 21:34:29,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-21 21:34:29,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-10-21 21:34:29,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-21 21:34:29,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-21 21:34:29,850 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-10-21 21:34:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:29,851 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-21 21:34:29,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 21:34:29,851 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-21 21:34:29,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-21 21:34:29,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:29,851 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:30,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-21 21:34:30,060 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:30,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:30,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1384142351, now seen corresponding path program 27 times [2020-10-21 21:34:30,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:30,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625623975] [2020-10-21 21:34:30,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:30,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625623975] [2020-10-21 21:34:30,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020011309] [2020-10-21 21:34:30,179 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 [2020-10-21 21:34:30,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-21 21:34:30,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:30,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-21 21:34:30,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:30,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:30,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:30,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-21 21:34:30,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612080608] [2020-10-21 21:34:30,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 21:34:30,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:30,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 21:34:30,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:34:30,295 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 17 states. [2020-10-21 21:34:30,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:30,952 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-21 21:34:30,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-21 21:34:30,953 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-21 21:34:30,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:30,954 INFO L225 Difference]: With dead ends: 103 [2020-10-21 21:34:30,954 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 21:34:30,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-21 21:34:30,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 21:34:30,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2020-10-21 21:34:30,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-21 21:34:30,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-10-21 21:34:30,961 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 20 [2020-10-21 21:34:30,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:30,961 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-10-21 21:34:30,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 21:34:30,961 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-10-21 21:34:30,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-21 21:34:30,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:30,962 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:31,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-21 21:34:31,163 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:31,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:31,163 INFO L82 PathProgramCache]: Analyzing trace with hash -215934529, now seen corresponding path program 28 times [2020-10-21 21:34:31,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:31,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538795737] [2020-10-21 21:34:31,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:31,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538795737] [2020-10-21 21:34:31,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946634298] [2020-10-21 21:34:31,314 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 [2020-10-21 21:34:31,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:34:31,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:31,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-21 21:34:31,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:31,443 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:31,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:31,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-21 21:34:31,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360120029] [2020-10-21 21:34:31,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 21:34:31,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:31,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 21:34:31,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:34:31,461 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 17 states. [2020-10-21 21:34:32,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:32,184 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-21 21:34:32,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-21 21:34:32,185 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-21 21:34:32,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:32,187 INFO L225 Difference]: With dead ends: 111 [2020-10-21 21:34:32,187 INFO L226 Difference]: Without dead ends: 102 [2020-10-21 21:34:32,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-10-21 21:34:32,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-21 21:34:32,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2020-10-21 21:34:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-21 21:34:32,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-21 21:34:32,195 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 20 [2020-10-21 21:34:32,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:32,195 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-21 21:34:32,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 21:34:32,195 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-21 21:34:32,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-21 21:34:32,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:32,196 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:32,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:32,407 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:32,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:32,407 INFO L82 PathProgramCache]: Analyzing trace with hash -41234864, now seen corresponding path program 29 times [2020-10-21 21:34:32,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:32,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558392317] [2020-10-21 21:34:32,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:32,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558392317] [2020-10-21 21:34:32,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250769396] [2020-10-21 21:34:32,546 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 [2020-10-21 21:34:32,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-21 21:34:32,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:32,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-21 21:34:32,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:32,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:32,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:32,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-21 21:34:32,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790814368] [2020-10-21 21:34:32,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 21:34:32,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:32,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 21:34:32,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-21 21:34:32,651 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-21 21:34:33,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:33,430 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-10-21 21:34:33,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-21 21:34:33,431 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-21 21:34:33,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:33,432 INFO L225 Difference]: With dead ends: 112 [2020-10-21 21:34:33,432 INFO L226 Difference]: Without dead ends: 103 [2020-10-21 21:34:33,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-21 21:34:33,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-21 21:34:33,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-10-21 21:34:33,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-21 21:34:33,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-10-21 21:34:33,436 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 21 [2020-10-21 21:34:33,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:33,436 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-10-21 21:34:33,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 21:34:33,437 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-10-21 21:34:33,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-21 21:34:33,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:33,437 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:33,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:33,646 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:33,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:33,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1895992291, now seen corresponding path program 30 times [2020-10-21 21:34:33,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:33,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842755866] [2020-10-21 21:34:33,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:33,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842755866] [2020-10-21 21:34:33,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676332517] [2020-10-21 21:34:33,767 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 [2020-10-21 21:34:33,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-21 21:34:33,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:33,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-21 21:34:33,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:33,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:33,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:33,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-21 21:34:33,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945621850] [2020-10-21 21:34:33,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 21:34:33,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:33,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 21:34:33,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-21 21:34:33,879 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 18 states. [2020-10-21 21:34:34,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:34,660 INFO L93 Difference]: Finished difference Result 96 states and 233 transitions. [2020-10-21 21:34:34,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-21 21:34:34,661 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-21 21:34:34,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:34,662 INFO L225 Difference]: With dead ends: 96 [2020-10-21 21:34:34,662 INFO L226 Difference]: Without dead ends: 91 [2020-10-21 21:34:34,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-21 21:34:34,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-21 21:34:34,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-10-21 21:34:34,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-21 21:34:34,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-21 21:34:34,668 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-21 21:34:34,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:34,668 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-21 21:34:34,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 21:34:34,669 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-21 21:34:34,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-21 21:34:34,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:34,670 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:34,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-21 21:34:34,881 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:34,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:34,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1242888800, now seen corresponding path program 31 times [2020-10-21 21:34:34,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:34,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637937740] [2020-10-21 21:34:34,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:35,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637937740] [2020-10-21 21:34:35,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626325501] [2020-10-21 21:34:35,164 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 [2020-10-21 21:34:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:35,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 21:34:35,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:35,222 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:35,239 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:35,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:35,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-21 21:34:35,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171244094] [2020-10-21 21:34:35,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 21:34:35,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:35,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 21:34:35,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-21 21:34:35,241 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-21 21:34:35,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:35,597 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-21 21:34:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 21:34:35,598 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-21 21:34:35,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:35,599 INFO L225 Difference]: With dead ends: 96 [2020-10-21 21:34:35,599 INFO L226 Difference]: Without dead ends: 90 [2020-10-21 21:34:35,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=704, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 21:34:35,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-21 21:34:35,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2020-10-21 21:34:35,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-21 21:34:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-21 21:34:35,603 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-10-21 21:34:35,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:35,604 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-21 21:34:35,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 21:34:35,604 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-21 21:34:35,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-21 21:34:35,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:35,605 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:35,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:35,816 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:35,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:35,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1278252686, now seen corresponding path program 32 times [2020-10-21 21:34:35,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:35,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359027303] [2020-10-21 21:34:35,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:35,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359027303] [2020-10-21 21:34:35,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523226373] [2020-10-21 21:34:35,963 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 [2020-10-21 21:34:36,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:36,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:36,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-21 21:34:36,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:36,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:36,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:36,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-21 21:34:36,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626013279] [2020-10-21 21:34:36,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-21 21:34:36,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:36,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-21 21:34:36,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-21 21:34:36,079 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 19 states. [2020-10-21 21:34:36,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:36,908 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-21 21:34:36,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-21 21:34:36,909 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-21 21:34:36,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:36,910 INFO L225 Difference]: With dead ends: 113 [2020-10-21 21:34:36,910 INFO L226 Difference]: Without dead ends: 108 [2020-10-21 21:34:36,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-21 21:34:36,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-21 21:34:36,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 61. [2020-10-21 21:34:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-21 21:34:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-10-21 21:34:36,914 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 22 [2020-10-21 21:34:36,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:36,914 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-10-21 21:34:36,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-21 21:34:36,914 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-10-21 21:34:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-21 21:34:36,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:36,915 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:37,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-21 21:34:37,116 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:37,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:37,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1353755908, now seen corresponding path program 33 times [2020-10-21 21:34:37,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:37,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028009685] [2020-10-21 21:34:37,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:37,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028009685] [2020-10-21 21:34:37,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469269169] [2020-10-21 21:34:37,291 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 [2020-10-21 21:34:37,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-21 21:34:37,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:37,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-21 21:34:37,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:37,400 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:37,413 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:37,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:37,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-21 21:34:37,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043932054] [2020-10-21 21:34:37,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-21 21:34:37,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:37,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-21 21:34:37,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-21 21:34:37,415 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 19 states. [2020-10-21 21:34:38,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:38,291 INFO L93 Difference]: Finished difference Result 121 states and 287 transitions. [2020-10-21 21:34:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-21 21:34:38,291 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-21 21:34:38,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:38,292 INFO L225 Difference]: With dead ends: 121 [2020-10-21 21:34:38,293 INFO L226 Difference]: Without dead ends: 112 [2020-10-21 21:34:38,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-21 21:34:38,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-21 21:34:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 77. [2020-10-21 21:34:38,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-21 21:34:38,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-21 21:34:38,297 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 22 [2020-10-21 21:34:38,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:38,297 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-21 21:34:38,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-21 21:34:38,297 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-21 21:34:38,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-21 21:34:38,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:38,298 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:38,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:38,501 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:38,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:38,501 INFO L82 PathProgramCache]: Analyzing trace with hash -971102387, now seen corresponding path program 34 times [2020-10-21 21:34:38,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:38,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177292796] [2020-10-21 21:34:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:38,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177292796] [2020-10-21 21:34:38,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034022020] [2020-10-21 21:34:38,660 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 [2020-10-21 21:34:38,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:34:38,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:38,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 21:34:38,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:38,755 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:38,768 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:38,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:38,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-21 21:34:38,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71472628] [2020-10-21 21:34:38,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-21 21:34:38,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:38,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-21 21:34:38,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-21 21:34:38,770 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-21 21:34:39,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:39,683 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-10-21 21:34:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-21 21:34:39,683 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-21 21:34:39,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:39,685 INFO L225 Difference]: With dead ends: 122 [2020-10-21 21:34:39,685 INFO L226 Difference]: Without dead ends: 113 [2020-10-21 21:34:39,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-21 21:34:39,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-21 21:34:39,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2020-10-21 21:34:39,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-21 21:34:39,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-10-21 21:34:39,689 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 23 [2020-10-21 21:34:39,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:39,689 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-10-21 21:34:39,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-21 21:34:39,690 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-10-21 21:34:39,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-21 21:34:39,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:39,690 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:39,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-21 21:34:39,900 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:39,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:39,900 INFO L82 PathProgramCache]: Analyzing trace with hash 983267910, now seen corresponding path program 35 times [2020-10-21 21:34:39,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:39,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398881141] [2020-10-21 21:34:39,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:40,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398881141] [2020-10-21 21:34:40,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213483762] [2020-10-21 21:34:40,042 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 [2020-10-21 21:34:40,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-21 21:34:40,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:40,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 21:34:40,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:40,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:40,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:40,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-21 21:34:40,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214047420] [2020-10-21 21:34:40,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-21 21:34:40,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:40,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-21 21:34:40,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-21 21:34:40,139 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 20 states. [2020-10-21 21:34:40,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:40,984 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-10-21 21:34:40,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-21 21:34:40,984 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-21 21:34:40,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:40,986 INFO L225 Difference]: With dead ends: 104 [2020-10-21 21:34:40,986 INFO L226 Difference]: Without dead ends: 99 [2020-10-21 21:34:40,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-21 21:34:40,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-21 21:34:40,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-10-21 21:34:40,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-21 21:34:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-21 21:34:40,991 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-21 21:34:40,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:40,991 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-21 21:34:40,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-21 21:34:40,991 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-21 21:34:40,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-21 21:34:40,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:40,992 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:41,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-21 21:34:41,203 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:41,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:41,203 INFO L82 PathProgramCache]: Analyzing trace with hash 415234755, now seen corresponding path program 36 times [2020-10-21 21:34:41,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:41,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741072589] [2020-10-21 21:34:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:41,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741072589] [2020-10-21 21:34:41,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773177046] [2020-10-21 21:34:41,448 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 [2020-10-21 21:34:41,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-21 21:34:41,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:41,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-21 21:34:41,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:41,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:41,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:41,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-21 21:34:41,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880711508] [2020-10-21 21:34:41,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-21 21:34:41,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:41,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-21 21:34:41,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-21 21:34:41,543 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-21 21:34:41,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:41,964 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-10-21 21:34:41,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 21:34:41,965 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-21 21:34:41,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:41,966 INFO L225 Difference]: With dead ends: 104 [2020-10-21 21:34:41,966 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 21:34:41,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2020-10-21 21:34:41,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 21:34:41,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-10-21 21:34:41,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-21 21:34:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-21 21:34:41,970 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 24 [2020-10-21 21:34:41,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:41,970 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-21 21:34:41,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-21 21:34:41,970 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-21 21:34:41,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-21 21:34:41,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:41,971 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:42,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-21 21:34:42,180 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:42,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:42,181 INFO L82 PathProgramCache]: Analyzing trace with hash -39374827, now seen corresponding path program 37 times [2020-10-21 21:34:42,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:42,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49854142] [2020-10-21 21:34:42,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:42,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49854142] [2020-10-21 21:34:42,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834220955] [2020-10-21 21:34:42,359 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 [2020-10-21 21:34:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:42,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-21 21:34:42,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:42,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:42,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:42,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-21 21:34:42,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478498855] [2020-10-21 21:34:42,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-21 21:34:42,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:42,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-21 21:34:42,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:34:42,468 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 21 states. [2020-10-21 21:34:43,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:43,424 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-21 21:34:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-21 21:34:43,425 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-21 21:34:43,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:43,426 INFO L225 Difference]: With dead ends: 123 [2020-10-21 21:34:43,426 INFO L226 Difference]: Without dead ends: 118 [2020-10-21 21:34:43,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-21 21:34:43,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-21 21:34:43,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 65. [2020-10-21 21:34:43,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-21 21:34:43,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-10-21 21:34:43,430 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 24 [2020-10-21 21:34:43,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:43,430 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-10-21 21:34:43,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-21 21:34:43,430 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-10-21 21:34:43,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-21 21:34:43,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:43,431 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:43,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-21 21:34:43,640 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:43,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:43,640 INFO L82 PathProgramCache]: Analyzing trace with hash 416559353, now seen corresponding path program 38 times [2020-10-21 21:34:43,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:43,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676374070] [2020-10-21 21:34:43,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:43,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676374070] [2020-10-21 21:34:43,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751402258] [2020-10-21 21:34:43,810 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 [2020-10-21 21:34:43,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:43,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:43,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-21 21:34:43,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:43,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:43,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:43,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-21 21:34:43,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77395312] [2020-10-21 21:34:43,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-21 21:34:43,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:43,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-21 21:34:43,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:34:43,915 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 21 states. [2020-10-21 21:34:44,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:44,960 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-21 21:34:44,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-21 21:34:44,960 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-21 21:34:44,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:44,962 INFO L225 Difference]: With dead ends: 131 [2020-10-21 21:34:44,962 INFO L226 Difference]: Without dead ends: 122 [2020-10-21 21:34:44,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-10-21 21:34:44,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-21 21:34:44,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 83. [2020-10-21 21:34:44,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-21 21:34:44,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-21 21:34:44,966 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 24 [2020-10-21 21:34:44,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:44,967 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-21 21:34:44,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-21 21:34:44,967 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-21 21:34:44,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-21 21:34:44,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:44,968 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:45,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-21 21:34:45,179 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:45,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:45,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1220594422, now seen corresponding path program 39 times [2020-10-21 21:34:45,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:45,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058934488] [2020-10-21 21:34:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:45,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058934488] [2020-10-21 21:34:45,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131456699] [2020-10-21 21:34:45,374 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 [2020-10-21 21:34:45,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-21 21:34:45,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:45,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-21 21:34:45,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:45,463 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:45,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:45,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-21 21:34:45,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244599807] [2020-10-21 21:34:45,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-21 21:34:45,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:45,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-21 21:34:45,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-21 21:34:45,480 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-21 21:34:46,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:46,578 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-10-21 21:34:46,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-21 21:34:46,578 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-21 21:34:46,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:46,580 INFO L225 Difference]: With dead ends: 132 [2020-10-21 21:34:46,580 INFO L226 Difference]: Without dead ends: 123 [2020-10-21 21:34:46,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-21 21:34:46,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-21 21:34:46,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 65. [2020-10-21 21:34:46,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-21 21:34:46,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-10-21 21:34:46,584 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 25 [2020-10-21 21:34:46,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:46,585 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-10-21 21:34:46,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-21 21:34:46,585 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-10-21 21:34:46,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-21 21:34:46,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:46,585 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:46,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-21 21:34:46,795 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:46,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:46,795 INFO L82 PathProgramCache]: Analyzing trace with hash 28466153, now seen corresponding path program 40 times [2020-10-21 21:34:46,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:46,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665718660] [2020-10-21 21:34:46,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:46,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665718660] [2020-10-21 21:34:46,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311194343] [2020-10-21 21:34:46,993 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 [2020-10-21 21:34:47,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:34:47,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:47,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-21 21:34:47,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:47,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:47,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:47,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-21 21:34:47,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602485451] [2020-10-21 21:34:47,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-21 21:34:47,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:47,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-21 21:34:47,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-21 21:34:47,102 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 22 states. [2020-10-21 21:34:48,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:48,151 INFO L93 Difference]: Finished difference Result 112 states and 273 transitions. [2020-10-21 21:34:48,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-21 21:34:48,151 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-21 21:34:48,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:48,152 INFO L225 Difference]: With dead ends: 112 [2020-10-21 21:34:48,153 INFO L226 Difference]: Without dead ends: 107 [2020-10-21 21:34:48,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-21 21:34:48,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-21 21:34:48,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-10-21 21:34:48,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-21 21:34:48,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-21 21:34:48,158 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-21 21:34:48,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:48,158 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-21 21:34:48,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-21 21:34:48,158 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-21 21:34:48,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-21 21:34:48,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:48,159 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:48,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-21 21:34:48,370 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:48,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:48,370 INFO L82 PathProgramCache]: Analyzing trace with hash -391352730, now seen corresponding path program 41 times [2020-10-21 21:34:48,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:48,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992619963] [2020-10-21 21:34:48,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:48,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992619963] [2020-10-21 21:34:48,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926524279] [2020-10-21 21:34:48,679 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 [2020-10-21 21:34:48,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-21 21:34:48,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:48,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-21 21:34:48,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:48,739 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:48,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:48,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-21 21:34:48,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632410847] [2020-10-21 21:34:48,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-21 21:34:48,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:48,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-21 21:34:48,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-10-21 21:34:48,755 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-21 21:34:49,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:49,277 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-21 21:34:49,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 21:34:49,278 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-21 21:34:49,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:49,279 INFO L225 Difference]: With dead ends: 112 [2020-10-21 21:34:49,279 INFO L226 Difference]: Without dead ends: 106 [2020-10-21 21:34:49,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=540, Invalid=1100, Unknown=0, NotChecked=0, Total=1640 [2020-10-21 21:34:49,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-21 21:34:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2020-10-21 21:34:49,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-21 21:34:49,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-10-21 21:34:49,283 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 26 [2020-10-21 21:34:49,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:49,283 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-10-21 21:34:49,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-21 21:34:49,283 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-10-21 21:34:49,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-21 21:34:49,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:49,284 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:49,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:49,491 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:49,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:49,491 INFO L82 PathProgramCache]: Analyzing trace with hash 816306680, now seen corresponding path program 42 times [2020-10-21 21:34:49,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:49,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647385508] [2020-10-21 21:34:49,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:49,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647385508] [2020-10-21 21:34:49,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046787533] [2020-10-21 21:34:49,700 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 [2020-10-21 21:34:49,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-21 21:34:49,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:49,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-21 21:34:49,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:49,806 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:49,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:49,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-21 21:34:49,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006367303] [2020-10-21 21:34:49,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 21:34:49,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:49,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 21:34:49,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-21 21:34:49,827 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 23 states. [2020-10-21 21:34:50,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:50,966 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-21 21:34:50,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-21 21:34:50,970 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-21 21:34:50,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:50,972 INFO L225 Difference]: With dead ends: 133 [2020-10-21 21:34:50,972 INFO L226 Difference]: Without dead ends: 128 [2020-10-21 21:34:50,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-21 21:34:50,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-21 21:34:50,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 69. [2020-10-21 21:34:50,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-21 21:34:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-10-21 21:34:50,976 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 26 [2020-10-21 21:34:50,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:50,976 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-10-21 21:34:50,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 21:34:50,977 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-10-21 21:34:50,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-21 21:34:50,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:50,977 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:51,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-21 21:34:51,189 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:51,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:51,189 INFO L82 PathProgramCache]: Analyzing trace with hash 882475958, now seen corresponding path program 43 times [2020-10-21 21:34:51,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:51,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369293833] [2020-10-21 21:34:51,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:51,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369293833] [2020-10-21 21:34:51,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182963486] [2020-10-21 21:34:51,409 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 [2020-10-21 21:34:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:51,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-21 21:34:51,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:51,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:51,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:51,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-21 21:34:51,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847352386] [2020-10-21 21:34:51,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 21:34:51,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:51,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 21:34:51,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-21 21:34:51,511 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 23 states. [2020-10-21 21:34:52,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:52,786 INFO L93 Difference]: Finished difference Result 141 states and 335 transitions. [2020-10-21 21:34:52,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-21 21:34:52,787 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-21 21:34:52,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:52,788 INFO L225 Difference]: With dead ends: 141 [2020-10-21 21:34:52,788 INFO L226 Difference]: Without dead ends: 132 [2020-10-21 21:34:52,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-21 21:34:52,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-21 21:34:52,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 89. [2020-10-21 21:34:52,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-21 21:34:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-21 21:34:52,792 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 26 [2020-10-21 21:34:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:52,792 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-21 21:34:52,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 21:34:52,793 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-21 21:34:52,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-21 21:34:52,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:52,793 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:52,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:52,994 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:52,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:52,996 INFO L82 PathProgramCache]: Analyzing trace with hash -464271481, now seen corresponding path program 44 times [2020-10-21 21:34:52,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:52,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787936758] [2020-10-21 21:34:52,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:53,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787936758] [2020-10-21 21:34:53,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587957794] [2020-10-21 21:34:53,240 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 [2020-10-21 21:34:53,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:34:53,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:53,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-21 21:34:53,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:53,339 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:34:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:53,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:53,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-21 21:34:53,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987444181] [2020-10-21 21:34:53,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-21 21:34:53,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:53,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-21 21:34:53,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-21 21:34:53,357 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-21 21:34:54,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:54,639 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-10-21 21:34:54,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-21 21:34:54,640 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-21 21:34:54,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:54,641 INFO L225 Difference]: With dead ends: 142 [2020-10-21 21:34:54,641 INFO L226 Difference]: Without dead ends: 133 [2020-10-21 21:34:54,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-21 21:34:54,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-21 21:34:54,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 69. [2020-10-21 21:34:54,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-21 21:34:54,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-10-21 21:34:54,645 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 27 [2020-10-21 21:34:54,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:54,646 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-10-21 21:34:54,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-21 21:34:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-10-21 21:34:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-21 21:34:54,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:54,646 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:54,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-21 21:34:54,858 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:54,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:54,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1586979020, now seen corresponding path program 45 times [2020-10-21 21:34:54,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:54,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883054711] [2020-10-21 21:34:54,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:55,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883054711] [2020-10-21 21:34:55,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145725233] [2020-10-21 21:34:55,097 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 [2020-10-21 21:34:55,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-21 21:34:55,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:55,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-21 21:34:55,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:55,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:55,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:55,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-21 21:34:55,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387159570] [2020-10-21 21:34:55,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-21 21:34:55,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:55,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-21 21:34:55,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-21 21:34:55,214 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 24 states. [2020-10-21 21:34:56,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:56,474 INFO L93 Difference]: Finished difference Result 120 states and 293 transitions. [2020-10-21 21:34:56,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-21 21:34:56,475 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-21 21:34:56,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:56,476 INFO L225 Difference]: With dead ends: 120 [2020-10-21 21:34:56,476 INFO L226 Difference]: Without dead ends: 115 [2020-10-21 21:34:56,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-21 21:34:56,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-21 21:34:56,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-10-21 21:34:56,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-21 21:34:56,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-21 21:34:56,480 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-21 21:34:56,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:56,481 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-21 21:34:56,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-21 21:34:56,481 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-21 21:34:56,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-21 21:34:56,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:56,482 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:56,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:56,691 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:56,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:56,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1867154761, now seen corresponding path program 46 times [2020-10-21 21:34:56,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:56,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334592368] [2020-10-21 21:34:56,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:57,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334592368] [2020-10-21 21:34:57,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177548947] [2020-10-21 21:34:57,052 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 [2020-10-21 21:34:57,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:34:57,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:57,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-21 21:34:57,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:57,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:57,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:57,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-21 21:34:57,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39401278] [2020-10-21 21:34:57,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-21 21:34:57,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:57,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-21 21:34:57,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-10-21 21:34:57,125 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-10-21 21:34:57,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:57,694 INFO L93 Difference]: Finished difference Result 120 states and 291 transitions. [2020-10-21 21:34:57,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 21:34:57,695 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-21 21:34:57,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:57,696 INFO L225 Difference]: With dead ends: 120 [2020-10-21 21:34:57,696 INFO L226 Difference]: Without dead ends: 114 [2020-10-21 21:34:57,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=649, Invalid=1331, Unknown=0, NotChecked=0, Total=1980 [2020-10-21 21:34:57,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-21 21:34:57,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2020-10-21 21:34:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-21 21:34:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-10-21 21:34:57,699 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 28 [2020-10-21 21:34:57,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:57,699 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-10-21 21:34:57,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-21 21:34:57,699 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-10-21 21:34:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-21 21:34:57,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:57,700 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:57,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-21 21:34:57,901 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:57,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:57,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1507485925, now seen corresponding path program 47 times [2020-10-21 21:34:57,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:57,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135675878] [2020-10-21 21:34:57,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:34:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:58,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135675878] [2020-10-21 21:34:58,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961155060] [2020-10-21 21:34:58,198 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 [2020-10-21 21:34:58,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-21 21:34:58,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:34:58,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-21 21:34:58,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:34:58,317 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:34:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:34:58,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:34:58,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-21 21:34:58,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17440817] [2020-10-21 21:34:58,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-21 21:34:58,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:34:58,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-21 21:34:58,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:34:58,347 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 25 states. [2020-10-21 21:34:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:34:59,645 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-10-21 21:34:59,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-21 21:34:59,646 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-21 21:34:59,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:34:59,647 INFO L225 Difference]: With dead ends: 143 [2020-10-21 21:34:59,647 INFO L226 Difference]: Without dead ends: 138 [2020-10-21 21:34:59,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-10-21 21:34:59,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-21 21:34:59,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 73. [2020-10-21 21:34:59,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-21 21:34:59,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 177 transitions. [2020-10-21 21:34:59,651 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 177 transitions. Word has length 28 [2020-10-21 21:34:59,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:34:59,651 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 177 transitions. [2020-10-21 21:34:59,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-21 21:34:59,652 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 177 transitions. [2020-10-21 21:34:59,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-21 21:34:59,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:34:59,652 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:34:59,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-21 21:34:59,856 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:34:59,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:34:59,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1951734579, now seen corresponding path program 48 times [2020-10-21 21:34:59,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:34:59,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897954949] [2020-10-21 21:34:59,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:34:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:00,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897954949] [2020-10-21 21:35:00,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089273679] [2020-10-21 21:35:00,115 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 [2020-10-21 21:35:00,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-21 21:35:00,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:35:00,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-21 21:35:00,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:00,206 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:35:00,225 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:00,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:00,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-21 21:35:00,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972681693] [2020-10-21 21:35:00,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-21 21:35:00,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:00,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-21 21:35:00,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:35:00,227 INFO L87 Difference]: Start difference. First operand 73 states and 177 transitions. Second operand 25 states. [2020-10-21 21:35:01,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:01,591 INFO L93 Difference]: Finished difference Result 151 states and 359 transitions. [2020-10-21 21:35:01,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-21 21:35:01,592 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-21 21:35:01,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:01,593 INFO L225 Difference]: With dead ends: 151 [2020-10-21 21:35:01,593 INFO L226 Difference]: Without dead ends: 142 [2020-10-21 21:35:01,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1337, Invalid=2953, Unknown=0, NotChecked=0, Total=4290 [2020-10-21 21:35:01,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-21 21:35:01,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 95. [2020-10-21 21:35:01,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 21:35:01,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-10-21 21:35:01,597 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 28 [2020-10-21 21:35:01,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:01,598 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-10-21 21:35:01,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-21 21:35:01,598 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-10-21 21:35:01,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-21 21:35:01,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:01,599 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:01,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-21 21:35:01,811 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:01,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:01,811 INFO L82 PathProgramCache]: Analyzing trace with hash 512601796, now seen corresponding path program 49 times [2020-10-21 21:35:01,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:01,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302794204] [2020-10-21 21:35:01,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:02,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302794204] [2020-10-21 21:35:02,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132532093] [2020-10-21 21:35:02,090 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 [2020-10-21 21:35:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:02,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-21 21:35:02,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:02,171 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:35:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:02,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:02,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-21 21:35:02,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284556739] [2020-10-21 21:35:02,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-21 21:35:02,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:02,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-21 21:35:02,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-21 21:35:02,191 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 26 states. [2020-10-21 21:35:03,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:03,631 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-10-21 21:35:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-21 21:35:03,632 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-21 21:35:03,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:03,633 INFO L225 Difference]: With dead ends: 152 [2020-10-21 21:35:03,634 INFO L226 Difference]: Without dead ends: 143 [2020-10-21 21:35:03,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1459, Invalid=3233, Unknown=0, NotChecked=0, Total=4692 [2020-10-21 21:35:03,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-21 21:35:03,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 73. [2020-10-21 21:35:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-21 21:35:03,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 177 transitions. [2020-10-21 21:35:03,636 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 177 transitions. Word has length 29 [2020-10-21 21:35:03,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:03,637 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 177 transitions. [2020-10-21 21:35:03,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-21 21:35:03,637 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 177 transitions. [2020-10-21 21:35:03,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-21 21:35:03,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:03,637 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:03,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-21 21:35:03,838 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:03,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:03,839 INFO L82 PathProgramCache]: Analyzing trace with hash 374257903, now seen corresponding path program 50 times [2020-10-21 21:35:03,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:03,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243175051] [2020-10-21 21:35:03,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:04,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243175051] [2020-10-21 21:35:04,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081539548] [2020-10-21 21:35:04,119 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 [2020-10-21 21:35:04,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:35:04,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:35:04,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-21 21:35:04,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:04,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:35:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:04,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:04,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-21 21:35:04,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951430302] [2020-10-21 21:35:04,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-21 21:35:04,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:04,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-21 21:35:04,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-10-21 21:35:04,235 INFO L87 Difference]: Start difference. First operand 73 states and 177 transitions. Second operand 26 states. [2020-10-21 21:35:05,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:05,608 INFO L93 Difference]: Finished difference Result 128 states and 313 transitions. [2020-10-21 21:35:05,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-21 21:35:05,608 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-21 21:35:05,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:05,609 INFO L225 Difference]: With dead ends: 128 [2020-10-21 21:35:05,610 INFO L226 Difference]: Without dead ends: 123 [2020-10-21 21:35:05,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1409, Invalid=3013, Unknown=0, NotChecked=0, Total=4422 [2020-10-21 21:35:05,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-21 21:35:05,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 97. [2020-10-21 21:35:05,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-21 21:35:05,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-10-21 21:35:05,613 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-10-21 21:35:05,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:05,614 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-10-21 21:35:05,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-21 21:35:05,614 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-10-21 21:35:05,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-21 21:35:05,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:05,614 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:05,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:35:05,818 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:05,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:05,818 INFO L82 PathProgramCache]: Analyzing trace with hash -960598164, now seen corresponding path program 51 times [2020-10-21 21:35:05,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:05,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970552995] [2020-10-21 21:35:05,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:06,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970552995] [2020-10-21 21:35:06,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559451992] [2020-10-21 21:35:06,261 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 [2020-10-21 21:35:06,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-21 21:35:06,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:35:06,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-21 21:35:06,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:06,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:35:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:06,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:06,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-21 21:35:06,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419337425] [2020-10-21 21:35:06,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-21 21:35:06,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:06,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-21 21:35:06,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-10-21 21:35:06,347 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 26 states. [2020-10-21 21:35:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:06,969 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-10-21 21:35:06,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 21:35:06,970 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-21 21:35:06,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:06,971 INFO L225 Difference]: With dead ends: 128 [2020-10-21 21:35:06,971 INFO L226 Difference]: Without dead ends: 122 [2020-10-21 21:35:06,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=768, Invalid=1584, Unknown=0, NotChecked=0, Total=2352 [2020-10-21 21:35:06,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-21 21:35:06,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 100. [2020-10-21 21:35:06,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-21 21:35:06,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 255 transitions. [2020-10-21 21:35:06,975 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 255 transitions. Word has length 30 [2020-10-21 21:35:06,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:06,975 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 255 transitions. [2020-10-21 21:35:06,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-21 21:35:06,975 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 255 transitions. [2020-10-21 21:35:06,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-21 21:35:06,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:06,975 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:07,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:35:07,176 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:07,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:07,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1289185410, now seen corresponding path program 52 times [2020-10-21 21:35:07,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:07,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487940878] [2020-10-21 21:35:07,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:07,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487940878] [2020-10-21 21:35:07,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283653952] [2020-10-21 21:35:07,488 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 [2020-10-21 21:35:07,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:35:07,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:35:07,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-21 21:35:07,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:07,577 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:35:07,599 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:07,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:07,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-21 21:35:07,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269304798] [2020-10-21 21:35:07,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-21 21:35:07,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:07,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-21 21:35:07,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-10-21 21:35:07,600 INFO L87 Difference]: Start difference. First operand 100 states and 255 transitions. Second operand 27 states. [2020-10-21 21:35:09,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:09,117 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-10-21 21:35:09,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-21 21:35:09,117 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-21 21:35:09,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:09,119 INFO L225 Difference]: With dead ends: 153 [2020-10-21 21:35:09,119 INFO L226 Difference]: Without dead ends: 148 [2020-10-21 21:35:09,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1649, Invalid=3463, Unknown=0, NotChecked=0, Total=5112 [2020-10-21 21:35:09,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-21 21:35:09,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 77. [2020-10-21 21:35:09,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-21 21:35:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 187 transitions. [2020-10-21 21:35:09,123 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 187 transitions. Word has length 30 [2020-10-21 21:35:09,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:09,123 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 187 transitions. [2020-10-21 21:35:09,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-21 21:35:09,123 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 187 transitions. [2020-10-21 21:35:09,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-21 21:35:09,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:09,124 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:09,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-21 21:35:09,333 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:09,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:09,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1282881680, now seen corresponding path program 53 times [2020-10-21 21:35:09,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:09,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144922372] [2020-10-21 21:35:09,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:09,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144922372] [2020-10-21 21:35:09,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721655087] [2020-10-21 21:35:09,633 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 [2020-10-21 21:35:09,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-21 21:35:09,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:35:09,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-21 21:35:09,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:09,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:35:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:09,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:09,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-21 21:35:09,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960960662] [2020-10-21 21:35:09,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-21 21:35:09,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:09,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-21 21:35:09,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-10-21 21:35:09,814 INFO L87 Difference]: Start difference. First operand 77 states and 187 transitions. Second operand 27 states. [2020-10-21 21:35:11,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:11,572 INFO L93 Difference]: Finished difference Result 161 states and 383 transitions. [2020-10-21 21:35:11,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-21 21:35:11,573 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-21 21:35:11,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:11,575 INFO L225 Difference]: With dead ends: 161 [2020-10-21 21:35:11,575 INFO L226 Difference]: Without dead ends: 152 [2020-10-21 21:35:11,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1590, Invalid=3522, Unknown=0, NotChecked=0, Total=5112 [2020-10-21 21:35:11,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-21 21:35:11,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 101. [2020-10-21 21:35:11,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-21 21:35:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 259 transitions. [2020-10-21 21:35:11,579 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 259 transitions. Word has length 30 [2020-10-21 21:35:11,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:11,580 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 259 transitions. [2020-10-21 21:35:11,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-21 21:35:11,580 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 259 transitions. [2020-10-21 21:35:11,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-21 21:35:11,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:11,580 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:11,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:35:11,791 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:11,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:11,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1310016831, now seen corresponding path program 54 times [2020-10-21 21:35:11,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:11,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710350679] [2020-10-21 21:35:11,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:12,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710350679] [2020-10-21 21:35:12,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487731007] [2020-10-21 21:35:12,100 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 [2020-10-21 21:35:12,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-21 21:35:12,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:35:12,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-21 21:35:12,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:12,197 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:35:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:12,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:12,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-21 21:35:12,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908379756] [2020-10-21 21:35:12,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-21 21:35:12,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:12,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-21 21:35:12,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-21 21:35:12,219 INFO L87 Difference]: Start difference. First operand 101 states and 259 transitions. Second operand 28 states. [2020-10-21 21:35:13,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:13,966 INFO L93 Difference]: Finished difference Result 162 states and 385 transitions. [2020-10-21 21:35:13,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-21 21:35:13,967 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-21 21:35:13,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:13,968 INFO L225 Difference]: With dead ends: 162 [2020-10-21 21:35:13,968 INFO L226 Difference]: Without dead ends: 153 [2020-10-21 21:35:13,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1723, Invalid=3827, Unknown=0, NotChecked=0, Total=5550 [2020-10-21 21:35:13,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-21 21:35:13,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 77. [2020-10-21 21:35:13,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-21 21:35:13,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 187 transitions. [2020-10-21 21:35:13,972 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 187 transitions. Word has length 31 [2020-10-21 21:35:13,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:13,972 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 187 transitions. [2020-10-21 21:35:13,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-21 21:35:13,972 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 187 transitions. [2020-10-21 21:35:13,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-21 21:35:13,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:13,973 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:14,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-21 21:35:14,175 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:14,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:14,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1114598318, now seen corresponding path program 55 times [2020-10-21 21:35:14,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:14,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573058591] [2020-10-21 21:35:14,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:14,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573058591] [2020-10-21 21:35:14,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620356597] [2020-10-21 21:35:14,513 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 [2020-10-21 21:35:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:14,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-21 21:35:14,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:14,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:35:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:14,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:14,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-21 21:35:14,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396106651] [2020-10-21 21:35:14,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-21 21:35:14,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:14,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-21 21:35:14,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-10-21 21:35:14,709 INFO L87 Difference]: Start difference. First operand 77 states and 187 transitions. Second operand 28 states. [2020-10-21 21:35:16,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:16,642 INFO L93 Difference]: Finished difference Result 136 states and 333 transitions. [2020-10-21 21:35:16,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-21 21:35:16,642 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-21 21:35:16,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:16,644 INFO L225 Difference]: With dead ends: 136 [2020-10-21 21:35:16,644 INFO L226 Difference]: Without dead ends: 131 [2020-10-21 21:35:16,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1669, Invalid=3587, Unknown=0, NotChecked=0, Total=5256 [2020-10-21 21:35:16,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-21 21:35:16,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2020-10-21 21:35:16,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-21 21:35:16,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-10-21 21:35:16,647 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-10-21 21:35:16,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:16,647 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-10-21 21:35:16,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-21 21:35:16,648 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-10-21 21:35:16,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-21 21:35:16,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:16,648 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:16,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-21 21:35:16,858 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:16,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:16,858 INFO L82 PathProgramCache]: Analyzing trace with hash 283139279, now seen corresponding path program 56 times [2020-10-21 21:35:16,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:16,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783821658] [2020-10-21 21:35:16,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:17,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783821658] [2020-10-21 21:35:17,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697367810] [2020-10-21 21:35:17,440 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 [2020-10-21 21:35:17,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:35:17,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:35:17,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-21 21:35:17,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:17,534 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:35:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:17,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:17,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-21 21:35:17,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715064213] [2020-10-21 21:35:17,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-21 21:35:17,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:17,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-21 21:35:17,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-10-21 21:35:17,549 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 28 states. [2020-10-21 21:35:18,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:18,336 INFO L93 Difference]: Finished difference Result 136 states and 331 transitions. [2020-10-21 21:35:18,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-21 21:35:18,336 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-21 21:35:18,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:18,338 INFO L225 Difference]: With dead ends: 136 [2020-10-21 21:35:18,338 INFO L226 Difference]: Without dead ends: 130 [2020-10-21 21:35:18,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=897, Invalid=1859, Unknown=0, NotChecked=0, Total=2756 [2020-10-21 21:35:18,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-21 21:35:18,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 106. [2020-10-21 21:35:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-21 21:35:18,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 271 transitions. [2020-10-21 21:35:18,341 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 271 transitions. Word has length 32 [2020-10-21 21:35:18,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:18,341 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 271 transitions. [2020-10-21 21:35:18,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-21 21:35:18,341 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 271 transitions. [2020-10-21 21:35:18,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-21 21:35:18,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:18,341 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:18,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-21 21:35:18,542 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:18,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:18,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1955787999, now seen corresponding path program 57 times [2020-10-21 21:35:18,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:18,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940917818] [2020-10-21 21:35:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:18,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940917818] [2020-10-21 21:35:18,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598604647] [2020-10-21 21:35:18,897 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 [2020-10-21 21:35:18,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-21 21:35:18,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:35:18,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-21 21:35:18,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:19,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:35:19,035 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:19,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:19,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-21 21:35:19,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326874125] [2020-10-21 21:35:19,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-21 21:35:19,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:19,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-21 21:35:19,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-10-21 21:35:19,037 INFO L87 Difference]: Start difference. First operand 106 states and 271 transitions. Second operand 29 states. [2020-10-21 21:35:20,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:20,848 INFO L93 Difference]: Finished difference Result 163 states and 389 transitions. [2020-10-21 21:35:20,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-21 21:35:20,848 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-21 21:35:20,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:20,850 INFO L225 Difference]: With dead ends: 163 [2020-10-21 21:35:20,850 INFO L226 Difference]: Without dead ends: 158 [2020-10-21 21:35:20,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1930, Invalid=4076, Unknown=0, NotChecked=0, Total=6006 [2020-10-21 21:35:20,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-21 21:35:20,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 81. [2020-10-21 21:35:20,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-21 21:35:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2020-10-21 21:35:20,854 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 32 [2020-10-21 21:35:20,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:20,855 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2020-10-21 21:35:20,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-21 21:35:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2020-10-21 21:35:20,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-21 21:35:20,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:20,855 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:21,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-21 21:35:21,062 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:21,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:21,062 INFO L82 PathProgramCache]: Analyzing trace with hash -192784275, now seen corresponding path program 58 times [2020-10-21 21:35:21,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:21,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170984715] [2020-10-21 21:35:21,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:21,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170984715] [2020-10-21 21:35:21,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103354846] [2020-10-21 21:35:21,512 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 [2020-10-21 21:35:21,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:35:21,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:35:21,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-21 21:35:21,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:21,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:35:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:21,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:21,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-21 21:35:21,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711544806] [2020-10-21 21:35:21,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-21 21:35:21,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:21,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-21 21:35:21,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-10-21 21:35:21,689 INFO L87 Difference]: Start difference. First operand 81 states and 197 transitions. Second operand 29 states. [2020-10-21 21:35:23,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:23,860 INFO L93 Difference]: Finished difference Result 171 states and 407 transitions. [2020-10-21 21:35:23,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-21 21:35:23,861 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-21 21:35:23,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:23,862 INFO L225 Difference]: With dead ends: 171 [2020-10-21 21:35:23,862 INFO L226 Difference]: Without dead ends: 162 [2020-10-21 21:35:23,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1865, Invalid=4141, Unknown=0, NotChecked=0, Total=6006 [2020-10-21 21:35:23,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-21 21:35:23,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 107. [2020-10-21 21:35:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-21 21:35:23,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 275 transitions. [2020-10-21 21:35:23,866 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 275 transitions. Word has length 32 [2020-10-21 21:35:23,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:23,866 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 275 transitions. [2020-10-21 21:35:23,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-21 21:35:23,866 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 275 transitions. [2020-10-21 21:35:23,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-21 21:35:23,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:23,867 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:24,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-21 21:35:24,077 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:24,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:24,077 INFO L82 PathProgramCache]: Analyzing trace with hash -499860610, now seen corresponding path program 59 times [2020-10-21 21:35:24,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:24,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782384587] [2020-10-21 21:35:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:24,444 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:24,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782384587] [2020-10-21 21:35:24,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51332053] [2020-10-21 21:35:24,445 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 [2020-10-21 21:35:24,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-21 21:35:24,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:35:24,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-21 21:35:24,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:24,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:35:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:24,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:24,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-21 21:35:24,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818630472] [2020-10-21 21:35:24,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-21 21:35:24,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:24,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-21 21:35:24,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-21 21:35:24,570 INFO L87 Difference]: Start difference. First operand 107 states and 275 transitions. Second operand 30 states. [2020-10-21 21:35:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:26,573 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2020-10-21 21:35:26,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-21 21:35:26,573 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-21 21:35:26,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:26,575 INFO L225 Difference]: With dead ends: 172 [2020-10-21 21:35:26,575 INFO L226 Difference]: Without dead ends: 163 [2020-10-21 21:35:26,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2009, Invalid=4471, Unknown=0, NotChecked=0, Total=6480 [2020-10-21 21:35:26,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-21 21:35:26,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 81. [2020-10-21 21:35:26,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-21 21:35:26,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2020-10-21 21:35:26,578 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 33 [2020-10-21 21:35:26,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:26,578 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2020-10-21 21:35:26,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-21 21:35:26,578 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2020-10-21 21:35:26,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-21 21:35:26,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:26,580 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:26,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:35:26,789 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:26,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:26,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1681317131, now seen corresponding path program 60 times [2020-10-21 21:35:26,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:26,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617844471] [2020-10-21 21:35:26,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:27,191 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:27,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617844471] [2020-10-21 21:35:27,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305538603] [2020-10-21 21:35:27,192 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 [2020-10-21 21:35:27,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-21 21:35:27,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:35:27,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-21 21:35:27,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:27,308 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:35:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:27,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:27,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-21 21:35:27,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004979089] [2020-10-21 21:35:27,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-21 21:35:27,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:27,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-21 21:35:27,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-10-21 21:35:27,336 INFO L87 Difference]: Start difference. First operand 81 states and 197 transitions. Second operand 30 states. [2020-10-21 21:35:29,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:29,318 INFO L93 Difference]: Finished difference Result 144 states and 353 transitions. [2020-10-21 21:35:29,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-21 21:35:29,319 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-21 21:35:29,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:29,320 INFO L225 Difference]: With dead ends: 144 [2020-10-21 21:35:29,320 INFO L226 Difference]: Without dead ends: 139 [2020-10-21 21:35:29,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1951, Invalid=4211, Unknown=0, NotChecked=0, Total=6162 [2020-10-21 21:35:29,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-21 21:35:29,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 109. [2020-10-21 21:35:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-21 21:35:29,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-10-21 21:35:29,323 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-10-21 21:35:29,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:29,323 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-10-21 21:35:29,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-21 21:35:29,323 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-10-21 21:35:29,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-21 21:35:29,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:29,324 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:29,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:35:29,525 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:29,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:29,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1513913714, now seen corresponding path program 61 times [2020-10-21 21:35:29,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:29,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048028319] [2020-10-21 21:35:29,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:30,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048028319] [2020-10-21 21:35:30,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851082934] [2020-10-21 21:35:30,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:35:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:30,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-21 21:35:30,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:30,156 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:35:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:30,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:30,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-21 21:35:30,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820341191] [2020-10-21 21:35:30,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-21 21:35:30,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:30,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-21 21:35:30,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-10-21 21:35:30,176 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 30 states. [2020-10-21 21:35:31,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:31,116 INFO L93 Difference]: Finished difference Result 144 states and 351 transitions. [2020-10-21 21:35:31,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-21 21:35:31,116 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-21 21:35:31,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:31,118 INFO L225 Difference]: With dead ends: 144 [2020-10-21 21:35:31,118 INFO L226 Difference]: Without dead ends: 138 [2020-10-21 21:35:31,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1036, Invalid=2156, Unknown=0, NotChecked=0, Total=3192 [2020-10-21 21:35:31,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-21 21:35:31,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2020-10-21 21:35:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 21:35:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 287 transitions. [2020-10-21 21:35:31,121 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 287 transitions. Word has length 34 [2020-10-21 21:35:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:31,121 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 287 transitions. [2020-10-21 21:35:31,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-21 21:35:31,122 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 287 transitions. [2020-10-21 21:35:31,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-21 21:35:31,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:31,122 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:31,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-21 21:35:31,324 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:31,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:31,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1684218372, now seen corresponding path program 62 times [2020-10-21 21:35:31,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:31,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935622903] [2020-10-21 21:35:31,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:31,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935622903] [2020-10-21 21:35:31,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647898142] [2020-10-21 21:35:31,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:35:31,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:35:31,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:35:31,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-21 21:35:31,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:31,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:35:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:31,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:31,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-21 21:35:31,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749080766] [2020-10-21 21:35:31,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-21 21:35:31,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:31,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-21 21:35:31,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2020-10-21 21:35:31,885 INFO L87 Difference]: Start difference. First operand 112 states and 287 transitions. Second operand 31 states. [2020-10-21 21:35:33,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:33,999 INFO L93 Difference]: Finished difference Result 173 states and 413 transitions. [2020-10-21 21:35:33,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-21 21:35:33,999 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-21 21:35:33,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:34,000 INFO L225 Difference]: With dead ends: 173 [2020-10-21 21:35:34,000 INFO L226 Difference]: Without dead ends: 168 [2020-10-21 21:35:34,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2233, Invalid=4739, Unknown=0, NotChecked=0, Total=6972 [2020-10-21 21:35:34,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-21 21:35:34,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 85. [2020-10-21 21:35:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-21 21:35:34,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 207 transitions. [2020-10-21 21:35:34,004 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 207 transitions. Word has length 34 [2020-10-21 21:35:34,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:34,005 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 207 transitions. [2020-10-21 21:35:34,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-21 21:35:34,005 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 207 transitions. [2020-10-21 21:35:34,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-21 21:35:34,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:34,006 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:34,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:35:34,208 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:34,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:34,208 INFO L82 PathProgramCache]: Analyzing trace with hash -581198294, now seen corresponding path program 63 times [2020-10-21 21:35:34,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:34,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939530185] [2020-10-21 21:35:34,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:34,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939530185] [2020-10-21 21:35:34,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438996747] [2020-10-21 21:35:34,702 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 [2020-10-21 21:35:34,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-21 21:35:34,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:35:34,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-21 21:35:34,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:34,869 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:35:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:34,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:34,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-21 21:35:34,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788721038] [2020-10-21 21:35:34,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-21 21:35:34,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:34,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-21 21:35:34,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2020-10-21 21:35:34,906 INFO L87 Difference]: Start difference. First operand 85 states and 207 transitions. Second operand 31 states. [2020-10-21 21:35:37,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:37,326 INFO L93 Difference]: Finished difference Result 181 states and 431 transitions. [2020-10-21 21:35:37,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-21 21:35:37,327 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-21 21:35:37,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:37,328 INFO L225 Difference]: With dead ends: 181 [2020-10-21 21:35:37,328 INFO L226 Difference]: Without dead ends: 172 [2020-10-21 21:35:37,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1914 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2162, Invalid=4810, Unknown=0, NotChecked=0, Total=6972 [2020-10-21 21:35:37,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-21 21:35:37,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 113. [2020-10-21 21:35:37,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-21 21:35:37,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 291 transitions. [2020-10-21 21:35:37,332 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 291 transitions. Word has length 34 [2020-10-21 21:35:37,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:37,333 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 291 transitions. [2020-10-21 21:35:37,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-21 21:35:37,333 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 291 transitions. [2020-10-21 21:35:37,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 21:35:37,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:37,333 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:37,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-21 21:35:37,544 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:37,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:37,544 INFO L82 PathProgramCache]: Analyzing trace with hash 671187195, now seen corresponding path program 64 times [2020-10-21 21:35:37,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:37,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086673244] [2020-10-21 21:35:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:38,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086673244] [2020-10-21 21:35:38,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355041048] [2020-10-21 21:35:38,005 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 [2020-10-21 21:35:38,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:35:38,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:35:38,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-21 21:35:38,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:38,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:35:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:38,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:38,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-21 21:35:38,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815450499] [2020-10-21 21:35:38,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-21 21:35:38,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:38,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-21 21:35:38,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2020-10-21 21:35:38,119 INFO L87 Difference]: Start difference. First operand 113 states and 291 transitions. Second operand 32 states. [2020-10-21 21:35:40,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:40,419 INFO L93 Difference]: Finished difference Result 182 states and 433 transitions. [2020-10-21 21:35:40,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-21 21:35:40,420 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-21 21:35:40,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:40,421 INFO L225 Difference]: With dead ends: 182 [2020-10-21 21:35:40,421 INFO L226 Difference]: Without dead ends: 173 [2020-10-21 21:35:40,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2135 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2317, Invalid=5165, Unknown=0, NotChecked=0, Total=7482 [2020-10-21 21:35:40,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-21 21:35:40,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 85. [2020-10-21 21:35:40,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-21 21:35:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 207 transitions. [2020-10-21 21:35:40,425 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 207 transitions. Word has length 35 [2020-10-21 21:35:40,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:40,425 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 207 transitions. [2020-10-21 21:35:40,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-21 21:35:40,425 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 207 transitions. [2020-10-21 21:35:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 21:35:40,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:40,426 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:40,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:35:40,635 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:40,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:40,635 INFO L82 PathProgramCache]: Analyzing trace with hash -837249832, now seen corresponding path program 65 times [2020-10-21 21:35:40,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:40,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041036966] [2020-10-21 21:35:40,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:41,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041036966] [2020-10-21 21:35:41,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310638882] [2020-10-21 21:35:41,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:35:41,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-21 21:35:41,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:35:41,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-21 21:35:41,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:41,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:35:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:41,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:41,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-21 21:35:41,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023265969] [2020-10-21 21:35:41,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-21 21:35:41,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:41,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-21 21:35:41,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-21 21:35:41,223 INFO L87 Difference]: Start difference. First operand 85 states and 207 transitions. Second operand 32 states. [2020-10-21 21:35:43,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:43,498 INFO L93 Difference]: Finished difference Result 152 states and 373 transitions. [2020-10-21 21:35:43,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-21 21:35:43,498 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-21 21:35:43,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:43,499 INFO L225 Difference]: With dead ends: 152 [2020-10-21 21:35:43,499 INFO L226 Difference]: Without dead ends: 147 [2020-10-21 21:35:43,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2255, Invalid=4885, Unknown=0, NotChecked=0, Total=7140 [2020-10-21 21:35:43,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-21 21:35:43,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2020-10-21 21:35:43,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-21 21:35:43,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 297 transitions. [2020-10-21 21:35:43,503 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 297 transitions. Word has length 35 [2020-10-21 21:35:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:43,503 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 297 transitions. [2020-10-21 21:35:43,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-21 21:35:43,503 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 297 transitions. [2020-10-21 21:35:43,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-21 21:35:43,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:43,504 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:43,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-21 21:35:43,711 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:43,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:43,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1122827947, now seen corresponding path program 66 times [2020-10-21 21:35:43,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:43,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729929969] [2020-10-21 21:35:43,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:44,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729929969] [2020-10-21 21:35:44,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90725230] [2020-10-21 21:35:44,367 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 [2020-10-21 21:35:44,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-10-21 21:35:44,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:35:44,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-21 21:35:44,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:44,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:35:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:44,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:44,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-10-21 21:35:44,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341070092] [2020-10-21 21:35:44,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-21 21:35:44,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:44,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-21 21:35:44,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-10-21 21:35:44,460 INFO L87 Difference]: Start difference. First operand 115 states and 297 transitions. Second operand 32 states. [2020-10-21 21:35:45,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:45,742 INFO L93 Difference]: Finished difference Result 152 states and 371 transitions. [2020-10-21 21:35:45,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-21 21:35:45,743 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-10-21 21:35:45,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:45,744 INFO L225 Difference]: With dead ends: 152 [2020-10-21 21:35:45,745 INFO L226 Difference]: Without dead ends: 146 [2020-10-21 21:35:45,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1185, Invalid=2475, Unknown=0, NotChecked=0, Total=3660 [2020-10-21 21:35:45,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-21 21:35:45,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 118. [2020-10-21 21:35:45,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-21 21:35:45,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 303 transitions. [2020-10-21 21:35:45,749 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 303 transitions. Word has length 36 [2020-10-21 21:35:45,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:45,750 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 303 transitions. [2020-10-21 21:35:45,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-21 21:35:45,750 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 303 transitions. [2020-10-21 21:35:45,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-21 21:35:45,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:45,751 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:45,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:35:45,952 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:45,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:45,952 INFO L82 PathProgramCache]: Analyzing trace with hash -668005337, now seen corresponding path program 67 times [2020-10-21 21:35:45,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:45,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361447897] [2020-10-21 21:35:45,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:46,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361447897] [2020-10-21 21:35:46,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659118300] [2020-10-21 21:35:46,438 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 [2020-10-21 21:35:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:46,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-21 21:35:46,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:46,536 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:35:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:46,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:46,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-10-21 21:35:46,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916473116] [2020-10-21 21:35:46,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-21 21:35:46,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:46,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-21 21:35:46,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 21:35:46,563 INFO L87 Difference]: Start difference. First operand 118 states and 303 transitions. Second operand 33 states. [2020-10-21 21:35:48,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:48,958 INFO L93 Difference]: Finished difference Result 183 states and 437 transitions. [2020-10-21 21:35:48,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-21 21:35:48,959 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-10-21 21:35:48,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:48,960 INFO L225 Difference]: With dead ends: 183 [2020-10-21 21:35:48,960 INFO L226 Difference]: Without dead ends: 178 [2020-10-21 21:35:48,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2558, Invalid=5452, Unknown=0, NotChecked=0, Total=8010 [2020-10-21 21:35:48,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-21 21:35:48,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 89. [2020-10-21 21:35:48,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-21 21:35:48,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 217 transitions. [2020-10-21 21:35:48,963 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 217 transitions. Word has length 36 [2020-10-21 21:35:48,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:48,963 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 217 transitions. [2020-10-21 21:35:48,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-21 21:35:48,963 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 217 transitions. [2020-10-21 21:35:48,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-21 21:35:48,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:48,964 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:49,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-21 21:35:49,171 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:49,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:49,172 INFO L82 PathProgramCache]: Analyzing trace with hash -184915801, now seen corresponding path program 68 times [2020-10-21 21:35:49,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:49,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349783804] [2020-10-21 21:35:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:49,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349783804] [2020-10-21 21:35:49,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300508925] [2020-10-21 21:35:49,672 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 [2020-10-21 21:35:49,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:35:49,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:35:49,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-21 21:35:49,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:49,770 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:35:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:49,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:49,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-10-21 21:35:49,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398796058] [2020-10-21 21:35:49,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-21 21:35:49,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:49,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-21 21:35:49,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 21:35:49,798 INFO L87 Difference]: Start difference. First operand 89 states and 217 transitions. Second operand 33 states. [2020-10-21 21:35:52,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:52,372 INFO L93 Difference]: Finished difference Result 191 states and 455 transitions. [2020-10-21 21:35:52,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-21 21:35:52,373 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-10-21 21:35:52,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:52,374 INFO L225 Difference]: With dead ends: 191 [2020-10-21 21:35:52,374 INFO L226 Difference]: Without dead ends: 182 [2020-10-21 21:35:52,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2481, Invalid=5529, Unknown=0, NotChecked=0, Total=8010 [2020-10-21 21:35:52,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-21 21:35:52,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 119. [2020-10-21 21:35:52,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-21 21:35:52,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 307 transitions. [2020-10-21 21:35:52,378 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 307 transitions. Word has length 36 [2020-10-21 21:35:52,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:52,378 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 307 transitions. [2020-10-21 21:35:52,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-21 21:35:52,378 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 307 transitions. [2020-10-21 21:35:52,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-21 21:35:52,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:52,379 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:52,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-21 21:35:52,580 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:52,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:52,580 INFO L82 PathProgramCache]: Analyzing trace with hash 766696248, now seen corresponding path program 69 times [2020-10-21 21:35:52,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:52,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200714456] [2020-10-21 21:35:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:53,099 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:53,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200714456] [2020-10-21 21:35:53,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346560154] [2020-10-21 21:35:53,100 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 [2020-10-21 21:35:53,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-10-21 21:35:53,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:35:53,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-21 21:35:53,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:53,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:35:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:53,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:53,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-10-21 21:35:53,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425532865] [2020-10-21 21:35:53,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-21 21:35:53,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:53,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-21 21:35:53,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=858, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 21:35:53,250 INFO L87 Difference]: Start difference. First operand 119 states and 307 transitions. Second operand 34 states. [2020-10-21 21:35:55,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:55,866 INFO L93 Difference]: Finished difference Result 192 states and 457 transitions. [2020-10-21 21:35:55,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-21 21:35:55,867 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-10-21 21:35:55,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:55,868 INFO L225 Difference]: With dead ends: 192 [2020-10-21 21:35:55,868 INFO L226 Difference]: Without dead ends: 183 [2020-10-21 21:35:55,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2456 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2647, Invalid=5909, Unknown=0, NotChecked=0, Total=8556 [2020-10-21 21:35:55,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-21 21:35:55,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 89. [2020-10-21 21:35:55,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-21 21:35:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 217 transitions. [2020-10-21 21:35:55,872 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 217 transitions. Word has length 37 [2020-10-21 21:35:55,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:55,872 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 217 transitions. [2020-10-21 21:35:55,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-21 21:35:55,872 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 217 transitions. [2020-10-21 21:35:55,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-21 21:35:55,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:55,873 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:56,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:35:56,074 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:56,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:56,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1437394437, now seen corresponding path program 70 times [2020-10-21 21:35:56,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:56,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986601264] [2020-10-21 21:35:56,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:35:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:56,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986601264] [2020-10-21 21:35:56,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868740826] [2020-10-21 21:35:56,713 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:35:56,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:35:56,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:35:56,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-21 21:35:56,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:35:56,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:35:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:35:56,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:35:56,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-10-21 21:35:56,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285196251] [2020-10-21 21:35:56,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-21 21:35:56,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:35:56,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-21 21:35:56,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 21:35:56,872 INFO L87 Difference]: Start difference. First operand 89 states and 217 transitions. Second operand 34 states. [2020-10-21 21:35:59,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:35:59,487 INFO L93 Difference]: Finished difference Result 160 states and 393 transitions. [2020-10-21 21:35:59,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-21 21:35:59,487 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-10-21 21:35:59,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:35:59,488 INFO L225 Difference]: With dead ends: 160 [2020-10-21 21:35:59,488 INFO L226 Difference]: Without dead ends: 155 [2020-10-21 21:35:59,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2581, Invalid=5609, Unknown=0, NotChecked=0, Total=8190 [2020-10-21 21:35:59,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-21 21:35:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-21 21:35:59,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-21 21:35:59,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 313 transitions. [2020-10-21 21:35:59,492 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 313 transitions. Word has length 37 [2020-10-21 21:35:59,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:35:59,492 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 313 transitions. [2020-10-21 21:35:59,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-21 21:35:59,492 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 313 transitions. [2020-10-21 21:35:59,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-21 21:35:59,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:35:59,492 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:35:59,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:35:59,693 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:35:59,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:35:59,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1000859528, now seen corresponding path program 71 times [2020-10-21 21:35:59,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:35:59,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340969650] [2020-10-21 21:35:59,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:35:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:36:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:00,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340969650] [2020-10-21 21:36:00,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977566190] [2020-10-21 21:36:00,449 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:00,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-10-21 21:36:00,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:36:00,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-21 21:36:00,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:36:00,514 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:36:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:00,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:36:00,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-10-21 21:36:00,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916489657] [2020-10-21 21:36:00,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-21 21:36:00,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:36:00,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-21 21:36:00,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 21:36:00,530 INFO L87 Difference]: Start difference. First operand 121 states and 313 transitions. Second operand 34 states. [2020-10-21 21:36:01,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:36:01,757 INFO L93 Difference]: Finished difference Result 160 states and 391 transitions. [2020-10-21 21:36:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-21 21:36:01,758 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2020-10-21 21:36:01,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:36:01,760 INFO L225 Difference]: With dead ends: 160 [2020-10-21 21:36:01,760 INFO L226 Difference]: Without dead ends: 154 [2020-10-21 21:36:01,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1344, Invalid=2816, Unknown=0, NotChecked=0, Total=4160 [2020-10-21 21:36:01,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-21 21:36:01,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-21 21:36:01,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-21 21:36:01,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 319 transitions. [2020-10-21 21:36:01,763 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 319 transitions. Word has length 38 [2020-10-21 21:36:01,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:36:01,764 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 319 transitions. [2020-10-21 21:36:01,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-21 21:36:01,764 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 319 transitions. [2020-10-21 21:36:01,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-21 21:36:01,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:36:01,765 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:36:01,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:01,974 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:36:01,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:36:01,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2002191990, now seen corresponding path program 72 times [2020-10-21 21:36:01,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:36:01,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250967752] [2020-10-21 21:36:01,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:36:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:36:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:02,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250967752] [2020-10-21 21:36:02,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359809018] [2020-10-21 21:36:02,562 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:02,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-10-21 21:36:02,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:36:02,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-21 21:36:02,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:36:02,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:36:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:02,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:36:02,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-10-21 21:36:02,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593630274] [2020-10-21 21:36:02,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-21 21:36:02,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:36:02,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-21 21:36:02,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2020-10-21 21:36:02,707 INFO L87 Difference]: Start difference. First operand 124 states and 319 transitions. Second operand 35 states. [2020-10-21 21:36:05,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:36:05,452 INFO L93 Difference]: Finished difference Result 193 states and 461 transitions. [2020-10-21 21:36:05,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-21 21:36:05,452 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-10-21 21:36:05,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:36:05,453 INFO L225 Difference]: With dead ends: 193 [2020-10-21 21:36:05,453 INFO L226 Difference]: Without dead ends: 188 [2020-10-21 21:36:05,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2680 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2905, Invalid=6215, Unknown=0, NotChecked=0, Total=9120 [2020-10-21 21:36:05,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-21 21:36:05,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 93. [2020-10-21 21:36:05,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-21 21:36:05,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 227 transitions. [2020-10-21 21:36:05,457 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 227 transitions. Word has length 38 [2020-10-21 21:36:05,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:36:05,458 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 227 transitions. [2020-10-21 21:36:05,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-21 21:36:05,458 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 227 transitions. [2020-10-21 21:36:05,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-21 21:36:05,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:36:05,458 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:36:05,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:05,666 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:36:05,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:36:05,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1609529372, now seen corresponding path program 73 times [2020-10-21 21:36:05,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:36:05,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845224174] [2020-10-21 21:36:05,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:36:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:36:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:06,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845224174] [2020-10-21 21:36:06,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918411347] [2020-10-21 21:36:06,243 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:36:06,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-21 21:36:06,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:36:06,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:36:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:06,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:36:06,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-10-21 21:36:06,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247894215] [2020-10-21 21:36:06,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-21 21:36:06,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:36:06,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-21 21:36:06,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2020-10-21 21:36:06,379 INFO L87 Difference]: Start difference. First operand 93 states and 227 transitions. Second operand 35 states. [2020-10-21 21:36:09,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:36:09,272 INFO L93 Difference]: Finished difference Result 201 states and 479 transitions. [2020-10-21 21:36:09,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-21 21:36:09,273 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-10-21 21:36:09,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:36:09,274 INFO L225 Difference]: With dead ends: 201 [2020-10-21 21:36:09,274 INFO L226 Difference]: Without dead ends: 192 [2020-10-21 21:36:09,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2822, Invalid=6298, Unknown=0, NotChecked=0, Total=9120 [2020-10-21 21:36:09,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-21 21:36:09,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 125. [2020-10-21 21:36:09,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-21 21:36:09,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 323 transitions. [2020-10-21 21:36:09,279 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 323 transitions. Word has length 38 [2020-10-21 21:36:09,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:36:09,279 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 323 transitions. [2020-10-21 21:36:09,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-21 21:36:09,279 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 323 transitions. [2020-10-21 21:36:09,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-21 21:36:09,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:36:09,280 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:36:09,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-21 21:36:09,481 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:36:09,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:36:09,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1938384331, now seen corresponding path program 74 times [2020-10-21 21:36:09,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:36:09,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96233913] [2020-10-21 21:36:09,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:36:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:36:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:10,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96233913] [2020-10-21 21:36:10,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137452300] [2020-10-21 21:36:10,099 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:10,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:36:10,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:36:10,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-21 21:36:10,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:36:10,228 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:36:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:10,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:36:10,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-10-21 21:36:10,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761428170] [2020-10-21 21:36:10,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-21 21:36:10,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:36:10,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-21 21:36:10,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=963, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 21:36:10,258 INFO L87 Difference]: Start difference. First operand 125 states and 323 transitions. Second operand 36 states. [2020-10-21 21:36:13,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:36:13,272 INFO L93 Difference]: Finished difference Result 202 states and 481 transitions. [2020-10-21 21:36:13,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-21 21:36:13,272 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-10-21 21:36:13,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:36:13,273 INFO L225 Difference]: With dead ends: 202 [2020-10-21 21:36:13,273 INFO L226 Difference]: Without dead ends: 193 [2020-10-21 21:36:13,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2799 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2999, Invalid=6703, Unknown=0, NotChecked=0, Total=9702 [2020-10-21 21:36:13,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-21 21:36:13,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 93. [2020-10-21 21:36:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-21 21:36:13,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 227 transitions. [2020-10-21 21:36:13,276 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 227 transitions. Word has length 39 [2020-10-21 21:36:13,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:36:13,277 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 227 transitions. [2020-10-21 21:36:13,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-21 21:36:13,277 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 227 transitions. [2020-10-21 21:36:13,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-21 21:36:13,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:36:13,277 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:36:13,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:13,486 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:36:13,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:36:13,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1644225118, now seen corresponding path program 75 times [2020-10-21 21:36:13,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:36:13,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735320142] [2020-10-21 21:36:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:36:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:36:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:14,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735320142] [2020-10-21 21:36:14,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055537915] [2020-10-21 21:36:14,113 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:14,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-21 21:36:14,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:36:14,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-21 21:36:14,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:36:14,234 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:36:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:14,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:36:14,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-10-21 21:36:14,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058679777] [2020-10-21 21:36:14,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-21 21:36:14,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:36:14,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-21 21:36:14,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 21:36:14,273 INFO L87 Difference]: Start difference. First operand 93 states and 227 transitions. Second operand 36 states. [2020-10-21 21:36:17,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:36:17,292 INFO L93 Difference]: Finished difference Result 168 states and 413 transitions. [2020-10-21 21:36:17,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-21 21:36:17,293 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-10-21 21:36:17,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:36:17,295 INFO L225 Difference]: With dead ends: 168 [2020-10-21 21:36:17,295 INFO L226 Difference]: Without dead ends: 163 [2020-10-21 21:36:17,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2929, Invalid=6383, Unknown=0, NotChecked=0, Total=9312 [2020-10-21 21:36:17,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-21 21:36:17,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 127. [2020-10-21 21:36:17,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-21 21:36:17,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 329 transitions. [2020-10-21 21:36:17,298 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 329 transitions. Word has length 39 [2020-10-21 21:36:17,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:36:17,299 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 329 transitions. [2020-10-21 21:36:17,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-21 21:36:17,299 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 329 transitions. [2020-10-21 21:36:17,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-21 21:36:17,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:36:17,301 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:36:17,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-21 21:36:17,511 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:36:17,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:36:17,511 INFO L82 PathProgramCache]: Analyzing trace with hash 246674139, now seen corresponding path program 76 times [2020-10-21 21:36:17,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:36:17,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816106509] [2020-10-21 21:36:17,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:36:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:36:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:18,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816106509] [2020-10-21 21:36:18,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44531237] [2020-10-21 21:36:18,380 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:18,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:36:18,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:36:18,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-21 21:36:18,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:36:18,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:36:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:18,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:36:18,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-10-21 21:36:18,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301444990] [2020-10-21 21:36:18,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-21 21:36:18,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:36:18,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-21 21:36:18,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 21:36:18,471 INFO L87 Difference]: Start difference. First operand 127 states and 329 transitions. Second operand 36 states. [2020-10-21 21:36:19,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:36:19,928 INFO L93 Difference]: Finished difference Result 168 states and 411 transitions. [2020-10-21 21:36:19,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-21 21:36:19,929 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2020-10-21 21:36:19,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:36:19,931 INFO L225 Difference]: With dead ends: 168 [2020-10-21 21:36:19,931 INFO L226 Difference]: Without dead ends: 162 [2020-10-21 21:36:19,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1513, Invalid=3179, Unknown=0, NotChecked=0, Total=4692 [2020-10-21 21:36:19,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-21 21:36:19,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 130. [2020-10-21 21:36:19,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-21 21:36:19,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 335 transitions. [2020-10-21 21:36:19,935 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 335 transitions. Word has length 40 [2020-10-21 21:36:19,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:36:19,935 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 335 transitions. [2020-10-21 21:36:19,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-21 21:36:19,935 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 335 transitions. [2020-10-21 21:36:19,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-21 21:36:19,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:36:19,936 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:36:20,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:20,142 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:36:20,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:36:20,142 INFO L82 PathProgramCache]: Analyzing trace with hash 39655981, now seen corresponding path program 77 times [2020-10-21 21:36:20,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:36:20,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942235089] [2020-10-21 21:36:20,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:36:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:36:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:20,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942235089] [2020-10-21 21:36:20,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900957576] [2020-10-21 21:36:20,810 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:20,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-10-21 21:36:20,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:36:20,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-21 21:36:20,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:36:20,922 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:36:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:20,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:36:20,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-10-21 21:36:20,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400911022] [2020-10-21 21:36:20,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-21 21:36:20,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:36:20,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-21 21:36:20,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2020-10-21 21:36:20,961 INFO L87 Difference]: Start difference. First operand 130 states and 335 transitions. Second operand 37 states. [2020-10-21 21:36:24,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:36:24,079 INFO L93 Difference]: Finished difference Result 203 states and 485 transitions. [2020-10-21 21:36:24,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-21 21:36:24,080 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-10-21 21:36:24,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:36:24,082 INFO L225 Difference]: With dead ends: 203 [2020-10-21 21:36:24,082 INFO L226 Difference]: Without dead ends: 198 [2020-10-21 21:36:24,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3274, Invalid=7028, Unknown=0, NotChecked=0, Total=10302 [2020-10-21 21:36:24,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-21 21:36:24,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 97. [2020-10-21 21:36:24,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-21 21:36:24,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 237 transitions. [2020-10-21 21:36:24,085 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 237 transitions. Word has length 40 [2020-10-21 21:36:24,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:36:24,085 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 237 transitions. [2020-10-21 21:36:24,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-21 21:36:24,085 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 237 transitions. [2020-10-21 21:36:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-21 21:36:24,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:36:24,086 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:36:24,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-21 21:36:24,288 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:36:24,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:36:24,288 INFO L82 PathProgramCache]: Analyzing trace with hash -568603679, now seen corresponding path program 78 times [2020-10-21 21:36:24,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:36:24,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127064256] [2020-10-21 21:36:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:36:24,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:36:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:24,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127064256] [2020-10-21 21:36:24,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177223037] [2020-10-21 21:36:24,971 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:25,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-10-21 21:36:25,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:36:25,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-21 21:36:25,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:36:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:25,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:36:25,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-10-21 21:36:25,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360797615] [2020-10-21 21:36:25,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-21 21:36:25,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:36:25,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-21 21:36:25,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1018, Unknown=0, NotChecked=0, Total=1332 [2020-10-21 21:36:25,130 INFO L87 Difference]: Start difference. First operand 97 states and 237 transitions. Second operand 37 states. [2020-10-21 21:36:28,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:36:28,133 INFO L93 Difference]: Finished difference Result 211 states and 503 transitions. [2020-10-21 21:36:28,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-21 21:36:28,134 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-10-21 21:36:28,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:36:28,137 INFO L225 Difference]: With dead ends: 211 [2020-10-21 21:36:28,137 INFO L226 Difference]: Without dead ends: 202 [2020-10-21 21:36:28,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2702, Invalid=7198, Unknown=0, NotChecked=0, Total=9900 [2020-10-21 21:36:28,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-21 21:36:28,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 131. [2020-10-21 21:36:28,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 21:36:28,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 339 transitions. [2020-10-21 21:36:28,141 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 339 transitions. Word has length 40 [2020-10-21 21:36:28,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:36:28,141 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 339 transitions. [2020-10-21 21:36:28,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-21 21:36:28,141 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 339 transitions. [2020-10-21 21:36:28,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-21 21:36:28,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:36:28,142 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:36:28,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:28,352 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:36:28,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:36:28,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1229360626, now seen corresponding path program 79 times [2020-10-21 21:36:28,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:36:28,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723013399] [2020-10-21 21:36:28,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:36:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:36:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:29,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723013399] [2020-10-21 21:36:29,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578667210] [2020-10-21 21:36:29,070 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:36:29,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-21 21:36:29,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:36:29,182 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:36:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:29,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:36:29,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-10-21 21:36:29,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112708366] [2020-10-21 21:36:29,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-21 21:36:29,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:36:29,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-21 21:36:29,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2020-10-21 21:36:29,219 INFO L87 Difference]: Start difference. First operand 131 states and 339 transitions. Second operand 38 states. [2020-10-21 21:36:32,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:36:32,612 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-10-21 21:36:32,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-21 21:36:32,612 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-10-21 21:36:32,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:36:32,614 INFO L225 Difference]: With dead ends: 212 [2020-10-21 21:36:32,614 INFO L226 Difference]: Without dead ends: 203 [2020-10-21 21:36:32,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3164 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3373, Invalid=7547, Unknown=0, NotChecked=0, Total=10920 [2020-10-21 21:36:32,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-21 21:36:32,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 97. [2020-10-21 21:36:32,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-21 21:36:32,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 237 transitions. [2020-10-21 21:36:32,618 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 237 transitions. Word has length 41 [2020-10-21 21:36:32,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:36:32,618 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 237 transitions. [2020-10-21 21:36:32,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-21 21:36:32,618 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 237 transitions. [2020-10-21 21:36:32,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-21 21:36:32,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:36:32,619 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:36:32,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:32,819 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:36:32,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:36:32,820 INFO L82 PathProgramCache]: Analyzing trace with hash -446816767, now seen corresponding path program 80 times [2020-10-21 21:36:32,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:36:32,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985735010] [2020-10-21 21:36:32,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:36:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:36:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:33,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985735010] [2020-10-21 21:36:33,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063558583] [2020-10-21 21:36:33,556 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:33,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:36:33,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:36:33,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-21 21:36:33,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:36:33,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:36:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:33,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:36:33,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-10-21 21:36:33,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617935838] [2020-10-21 21:36:33,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-21 21:36:33,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:36:33,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-21 21:36:33,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2020-10-21 21:36:33,715 INFO L87 Difference]: Start difference. First operand 97 states and 237 transitions. Second operand 38 states. [2020-10-21 21:36:37,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:36:37,107 INFO L93 Difference]: Finished difference Result 176 states and 433 transitions. [2020-10-21 21:36:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-21 21:36:37,108 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-10-21 21:36:37,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:36:37,109 INFO L225 Difference]: With dead ends: 176 [2020-10-21 21:36:37,109 INFO L226 Difference]: Without dead ends: 171 [2020-10-21 21:36:37,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2909 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3299, Invalid=7207, Unknown=0, NotChecked=0, Total=10506 [2020-10-21 21:36:37,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-21 21:36:37,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2020-10-21 21:36:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-21 21:36:37,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 345 transitions. [2020-10-21 21:36:37,112 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 345 transitions. Word has length 41 [2020-10-21 21:36:37,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:36:37,113 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 345 transitions. [2020-10-21 21:36:37,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-21 21:36:37,113 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 345 transitions. [2020-10-21 21:36:37,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-21 21:36:37,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:36:37,113 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:36:37,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:37,314 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:36:37,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:36:37,315 INFO L82 PathProgramCache]: Analyzing trace with hash 830652542, now seen corresponding path program 81 times [2020-10-21 21:36:37,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:36:37,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65891729] [2020-10-21 21:36:37,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:36:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:36:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:38,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65891729] [2020-10-21 21:36:38,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327958722] [2020-10-21 21:36:38,307 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:38,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-10-21 21:36:38,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:36:38,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-21 21:36:38,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:36:38,386 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:36:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:38,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:36:38,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2020-10-21 21:36:38,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030772012] [2020-10-21 21:36:38,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-21 21:36:38,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:36:38,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-21 21:36:38,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-10-21 21:36:38,405 INFO L87 Difference]: Start difference. First operand 133 states and 345 transitions. Second operand 38 states. [2020-10-21 21:36:40,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:36:40,040 INFO L93 Difference]: Finished difference Result 176 states and 431 transitions. [2020-10-21 21:36:40,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-21 21:36:40,041 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2020-10-21 21:36:40,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:36:40,042 INFO L225 Difference]: With dead ends: 176 [2020-10-21 21:36:40,042 INFO L226 Difference]: Without dead ends: 170 [2020-10-21 21:36:40,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1692, Invalid=3564, Unknown=0, NotChecked=0, Total=5256 [2020-10-21 21:36:40,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-21 21:36:40,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-21 21:36:40,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-21 21:36:40,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 351 transitions. [2020-10-21 21:36:40,046 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 351 transitions. Word has length 42 [2020-10-21 21:36:40,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:36:40,046 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 351 transitions. [2020-10-21 21:36:40,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-21 21:36:40,047 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 351 transitions. [2020-10-21 21:36:40,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-21 21:36:40,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:36:40,047 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:36:40,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:40,255 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:36:40,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:36:40,255 INFO L82 PathProgramCache]: Analyzing trace with hash -544498160, now seen corresponding path program 82 times [2020-10-21 21:36:40,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:36:40,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985803243] [2020-10-21 21:36:40,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:36:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:36:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:41,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985803243] [2020-10-21 21:36:41,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486571882] [2020-10-21 21:36:41,031 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:41,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:36:41,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:36:41,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-21 21:36:41,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:36:41,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:36:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:41,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:36:41,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-10-21 21:36:41,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57924025] [2020-10-21 21:36:41,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-21 21:36:41,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:36:41,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-21 21:36:41,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2020-10-21 21:36:41,188 INFO L87 Difference]: Start difference. First operand 136 states and 351 transitions. Second operand 39 states. [2020-10-21 21:36:44,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:36:44,742 INFO L93 Difference]: Finished difference Result 213 states and 509 transitions. [2020-10-21 21:36:44,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-21 21:36:44,743 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-10-21 21:36:44,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:36:44,744 INFO L225 Difference]: With dead ends: 213 [2020-10-21 21:36:44,744 INFO L226 Difference]: Without dead ends: 208 [2020-10-21 21:36:44,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3418 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3665, Invalid=7891, Unknown=0, NotChecked=0, Total=11556 [2020-10-21 21:36:44,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-21 21:36:44,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 101. [2020-10-21 21:36:44,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-21 21:36:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-21 21:36:44,747 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 42 [2020-10-21 21:36:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:36:44,748 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-21 21:36:44,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-21 21:36:44,748 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-21 21:36:44,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-21 21:36:44,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:36:44,748 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:36:44,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:44,953 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:36:44,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:36:44,953 INFO L82 PathProgramCache]: Analyzing trace with hash -966392674, now seen corresponding path program 83 times [2020-10-21 21:36:44,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:36:44,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557106873] [2020-10-21 21:36:44,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:36:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:36:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:45,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557106873] [2020-10-21 21:36:45,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165345444] [2020-10-21 21:36:45,738 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:45,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-10-21 21:36:45,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:36:45,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-21 21:36:45,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:36:45,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:36:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:45,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:36:45,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-10-21 21:36:45,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450852456] [2020-10-21 21:36:45,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-21 21:36:45,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:36:45,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-21 21:36:45,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1132, Unknown=0, NotChecked=0, Total=1482 [2020-10-21 21:36:45,909 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 39 states. [2020-10-21 21:36:49,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:36:49,653 INFO L93 Difference]: Finished difference Result 221 states and 527 transitions. [2020-10-21 21:36:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-21 21:36:49,654 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-10-21 21:36:49,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:36:49,656 INFO L225 Difference]: With dead ends: 221 [2020-10-21 21:36:49,656 INFO L226 Difference]: Without dead ends: 212 [2020-10-21 21:36:49,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3254 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3570, Invalid=7986, Unknown=0, NotChecked=0, Total=11556 [2020-10-21 21:36:49,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-21 21:36:49,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 137. [2020-10-21 21:36:49,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-21 21:36:49,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 355 transitions. [2020-10-21 21:36:49,665 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 355 transitions. Word has length 42 [2020-10-21 21:36:49,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:36:49,667 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 355 transitions. [2020-10-21 21:36:49,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-21 21:36:49,667 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 355 transitions. [2020-10-21 21:36:49,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-21 21:36:49,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:36:49,669 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:36:49,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:49,885 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:36:49,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:36:49,886 INFO L82 PathProgramCache]: Analyzing trace with hash 300451439, now seen corresponding path program 84 times [2020-10-21 21:36:49,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:36:49,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541968485] [2020-10-21 21:36:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:36:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:36:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:50,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541968485] [2020-10-21 21:36:50,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108747902] [2020-10-21 21:36:50,706 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:50,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-10-21 21:36:50,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:36:50,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-21 21:36:50,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:36:50,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:36:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:50,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:36:50,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-10-21 21:36:50,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587377697] [2020-10-21 21:36:50,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-21 21:36:50,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:36:50,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-21 21:36:50,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2020-10-21 21:36:50,900 INFO L87 Difference]: Start difference. First operand 137 states and 355 transitions. Second operand 40 states. [2020-10-21 21:36:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:36:54,757 INFO L93 Difference]: Finished difference Result 222 states and 529 transitions. [2020-10-21 21:36:54,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-21 21:36:54,759 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-10-21 21:36:54,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:36:54,760 INFO L225 Difference]: With dead ends: 222 [2020-10-21 21:36:54,761 INFO L226 Difference]: Without dead ends: 213 [2020-10-21 21:36:54,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3551 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3769, Invalid=8441, Unknown=0, NotChecked=0, Total=12210 [2020-10-21 21:36:54,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-21 21:36:54,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 101. [2020-10-21 21:36:54,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-21 21:36:54,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-21 21:36:54,764 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 43 [2020-10-21 21:36:54,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:36:54,765 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-21 21:36:54,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-21 21:36:54,765 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-21 21:36:54,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-21 21:36:54,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:36:54,766 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:36:54,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:54,968 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:36:54,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:36:54,968 INFO L82 PathProgramCache]: Analyzing trace with hash 106626276, now seen corresponding path program 85 times [2020-10-21 21:36:54,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:36:54,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783284403] [2020-10-21 21:36:54,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:36:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:36:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:55,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783284403] [2020-10-21 21:36:55,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823499721] [2020-10-21 21:36:55,805 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:36:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:36:55,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-21 21:36:55,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:36:55,919 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:36:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:36:55,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:36:55,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-10-21 21:36:55,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690503369] [2020-10-21 21:36:55,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-21 21:36:55,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:36:55,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-21 21:36:55,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2020-10-21 21:36:55,972 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 40 states. [2020-10-21 21:36:59,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:36:59,826 INFO L93 Difference]: Finished difference Result 184 states and 453 transitions. [2020-10-21 21:36:59,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-21 21:36:59,827 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-10-21 21:36:59,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:36:59,829 INFO L225 Difference]: With dead ends: 184 [2020-10-21 21:36:59,829 INFO L226 Difference]: Without dead ends: 179 [2020-10-21 21:36:59,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3278 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3691, Invalid=8081, Unknown=0, NotChecked=0, Total=11772 [2020-10-21 21:36:59,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-21 21:36:59,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 139. [2020-10-21 21:36:59,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-21 21:36:59,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 361 transitions. [2020-10-21 21:36:59,833 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 361 transitions. Word has length 43 [2020-10-21 21:36:59,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:36:59,833 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 361 transitions. [2020-10-21 21:36:59,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-21 21:36:59,833 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 361 transitions. [2020-10-21 21:36:59,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-21 21:36:59,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:36:59,834 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:37:00,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-21 21:37:00,039 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:37:00,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:37:00,039 INFO L82 PathProgramCache]: Analyzing trace with hash -606817951, now seen corresponding path program 86 times [2020-10-21 21:37:00,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:37:00,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349720974] [2020-10-21 21:37:00,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:37:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:37:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:01,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349720974] [2020-10-21 21:37:01,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837132262] [2020-10-21 21:37:01,172 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:37:01,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:37:01,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:37:01,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-21 21:37:01,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:37:01,244 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:37:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:01,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:37:01,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2020-10-21 21:37:01,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996431272] [2020-10-21 21:37:01,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-21 21:37:01,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:37:01,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-21 21:37:01,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-10-21 21:37:01,258 INFO L87 Difference]: Start difference. First operand 139 states and 361 transitions. Second operand 40 states. [2020-10-21 21:37:03,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:37:03,109 INFO L93 Difference]: Finished difference Result 184 states and 451 transitions. [2020-10-21 21:37:03,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-21 21:37:03,110 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2020-10-21 21:37:03,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:37:03,112 INFO L225 Difference]: With dead ends: 184 [2020-10-21 21:37:03,112 INFO L226 Difference]: Without dead ends: 178 [2020-10-21 21:37:03,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1881, Invalid=3971, Unknown=0, NotChecked=0, Total=5852 [2020-10-21 21:37:03,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-21 21:37:03,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 142. [2020-10-21 21:37:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-21 21:37:03,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 367 transitions. [2020-10-21 21:37:03,115 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 367 transitions. Word has length 44 [2020-10-21 21:37:03,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:37:03,115 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 367 transitions. [2020-10-21 21:37:03,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-21 21:37:03,115 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 367 transitions. [2020-10-21 21:37:03,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-21 21:37:03,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:37:03,116 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:37:03,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:37:03,320 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:37:03,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:37:03,320 INFO L82 PathProgramCache]: Analyzing trace with hash 724088115, now seen corresponding path program 87 times [2020-10-21 21:37:03,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:37:03,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964242112] [2020-10-21 21:37:03,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:37:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:37:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:04,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964242112] [2020-10-21 21:37:04,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373391873] [2020-10-21 21:37:04,199 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:37:04,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-10-21 21:37:04,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:37:04,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-21 21:37:04,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:37:04,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:37:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:04,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:37:04,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-10-21 21:37:04,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520984242] [2020-10-21 21:37:04,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-21 21:37:04,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:37:04,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-21 21:37:04,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1251, Unknown=0, NotChecked=0, Total=1640 [2020-10-21 21:37:04,375 INFO L87 Difference]: Start difference. First operand 142 states and 367 transitions. Second operand 41 states. [2020-10-21 21:37:08,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:37:08,465 INFO L93 Difference]: Finished difference Result 223 states and 533 transitions. [2020-10-21 21:37:08,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-21 21:37:08,466 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-10-21 21:37:08,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:37:08,468 INFO L225 Difference]: With dead ends: 223 [2020-10-21 21:37:08,468 INFO L226 Difference]: Without dead ends: 218 [2020-10-21 21:37:08,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3820 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4078, Invalid=8804, Unknown=0, NotChecked=0, Total=12882 [2020-10-21 21:37:08,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-21 21:37:08,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 105. [2020-10-21 21:37:08,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-21 21:37:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-21 21:37:08,471 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 44 [2020-10-21 21:37:08,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:37:08,472 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-21 21:37:08,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-21 21:37:08,472 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-21 21:37:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-21 21:37:08,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:37:08,472 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:37:08,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-21 21:37:08,673 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:37:08,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:37:08,674 INFO L82 PathProgramCache]: Analyzing trace with hash -989527525, now seen corresponding path program 88 times [2020-10-21 21:37:08,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:37:08,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964784690] [2020-10-21 21:37:08,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:37:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:37:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:09,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964784690] [2020-10-21 21:37:09,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044663989] [2020-10-21 21:37:09,575 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:37:09,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:37:09,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:37:09,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-21 21:37:09,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:37:09,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:37:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:09,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:37:09,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-10-21 21:37:09,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445117546] [2020-10-21 21:37:09,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-21 21:37:09,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:37:09,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-21 21:37:09,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1252, Unknown=0, NotChecked=0, Total=1640 [2020-10-21 21:37:09,753 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 41 states. [2020-10-21 21:37:14,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:37:14,134 INFO L93 Difference]: Finished difference Result 231 states and 551 transitions. [2020-10-21 21:37:14,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-21 21:37:14,135 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-10-21 21:37:14,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:37:14,136 INFO L225 Difference]: With dead ends: 231 [2020-10-21 21:37:14,136 INFO L226 Difference]: Without dead ends: 222 [2020-10-21 21:37:14,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3644 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3977, Invalid=8905, Unknown=0, NotChecked=0, Total=12882 [2020-10-21 21:37:14,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-21 21:37:14,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 143. [2020-10-21 21:37:14,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-21 21:37:14,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 371 transitions. [2020-10-21 21:37:14,140 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 371 transitions. Word has length 44 [2020-10-21 21:37:14,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:37:14,140 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 371 transitions. [2020-10-21 21:37:14,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-21 21:37:14,140 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 371 transitions. [2020-10-21 21:37:14,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-21 21:37:14,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:37:14,141 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:37:14,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:37:14,342 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:37:14,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:37:14,342 INFO L82 PathProgramCache]: Analyzing trace with hash 971920300, now seen corresponding path program 89 times [2020-10-21 21:37:14,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:37:14,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532315030] [2020-10-21 21:37:14,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:37:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:37:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:15,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532315030] [2020-10-21 21:37:15,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419457139] [2020-10-21 21:37:15,299 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:37:15,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-10-21 21:37:15,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:37:15,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-21 21:37:15,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:37:15,453 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:37:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:15,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:37:15,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-10-21 21:37:15,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020797264] [2020-10-21 21:37:15,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-21 21:37:15,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:37:15,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-21 21:37:15,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2020-10-21 21:37:15,492 INFO L87 Difference]: Start difference. First operand 143 states and 371 transitions. Second operand 42 states. [2020-10-21 21:37:19,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:37:19,995 INFO L93 Difference]: Finished difference Result 232 states and 553 transitions. [2020-10-21 21:37:19,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-21 21:37:19,996 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-10-21 21:37:19,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:37:19,998 INFO L225 Difference]: With dead ends: 232 [2020-10-21 21:37:19,998 INFO L226 Difference]: Without dead ends: 223 [2020-10-21 21:37:19,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4187, Invalid=9385, Unknown=0, NotChecked=0, Total=13572 [2020-10-21 21:37:20,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-21 21:37:20,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 105. [2020-10-21 21:37:20,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-21 21:37:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-21 21:37:20,002 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 45 [2020-10-21 21:37:20,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:37:20,002 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-21 21:37:20,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-21 21:37:20,003 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-21 21:37:20,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-21 21:37:20,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:37:20,003 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:37:20,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:37:20,213 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:37:20,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:37:20,213 INFO L82 PathProgramCache]: Analyzing trace with hash -610554105, now seen corresponding path program 90 times [2020-10-21 21:37:20,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:37:20,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788771432] [2020-10-21 21:37:20,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:37:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:37:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:21,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788771432] [2020-10-21 21:37:21,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234434925] [2020-10-21 21:37:21,176 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:37:21,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-10-21 21:37:21,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:37:21,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-21 21:37:21,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:37:21,318 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:37:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:21,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:37:21,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-10-21 21:37:21,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587671879] [2020-10-21 21:37:21,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-21 21:37:21,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:37:21,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-21 21:37:21,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2020-10-21 21:37:21,368 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 42 states. [2020-10-21 21:37:25,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:37:25,824 INFO L93 Difference]: Finished difference Result 192 states and 473 transitions. [2020-10-21 21:37:25,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-21 21:37:25,825 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-10-21 21:37:25,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:37:25,826 INFO L225 Difference]: With dead ends: 192 [2020-10-21 21:37:25,827 INFO L226 Difference]: Without dead ends: 187 [2020-10-21 21:37:25,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3669 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4105, Invalid=9005, Unknown=0, NotChecked=0, Total=13110 [2020-10-21 21:37:25,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-21 21:37:25,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2020-10-21 21:37:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-21 21:37:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 377 transitions. [2020-10-21 21:37:25,831 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 377 transitions. Word has length 45 [2020-10-21 21:37:25,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:37:25,831 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 377 transitions. [2020-10-21 21:37:25,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-21 21:37:25,831 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 377 transitions. [2020-10-21 21:37:25,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-21 21:37:25,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:37:25,832 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:37:26,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:37:26,032 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:37:26,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:37:26,033 INFO L82 PathProgramCache]: Analyzing trace with hash 963507588, now seen corresponding path program 91 times [2020-10-21 21:37:26,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:37:26,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759645708] [2020-10-21 21:37:26,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:37:26,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:37:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:27,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759645708] [2020-10-21 21:37:27,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029891029] [2020-10-21 21:37:27,517 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:37:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:37:27,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-21 21:37:27,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:37:27,590 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:37:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:27,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:37:27,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2020-10-21 21:37:27,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259027936] [2020-10-21 21:37:27,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-21 21:37:27,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:37:27,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-21 21:37:27,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-10-21 21:37:27,613 INFO L87 Difference]: Start difference. First operand 145 states and 377 transitions. Second operand 42 states. [2020-10-21 21:37:29,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:37:29,709 INFO L93 Difference]: Finished difference Result 192 states and 471 transitions. [2020-10-21 21:37:29,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-21 21:37:29,710 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2020-10-21 21:37:29,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:37:29,712 INFO L225 Difference]: With dead ends: 192 [2020-10-21 21:37:29,712 INFO L226 Difference]: Without dead ends: 186 [2020-10-21 21:37:29,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2080, Invalid=4400, Unknown=0, NotChecked=0, Total=6480 [2020-10-21 21:37:29,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-21 21:37:29,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 148. [2020-10-21 21:37:29,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-21 21:37:29,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 383 transitions. [2020-10-21 21:37:29,716 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 383 transitions. Word has length 46 [2020-10-21 21:37:29,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:37:29,716 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 383 transitions. [2020-10-21 21:37:29,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-21 21:37:29,716 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 383 transitions. [2020-10-21 21:37:29,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-21 21:37:29,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:37:29,717 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:37:29,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:37:29,919 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:37:29,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:37:29,920 INFO L82 PathProgramCache]: Analyzing trace with hash 64786326, now seen corresponding path program 92 times [2020-10-21 21:37:29,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:37:29,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543441798] [2020-10-21 21:37:29,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:37:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:37:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:30,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543441798] [2020-10-21 21:37:30,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719361068] [2020-10-21 21:37:30,960 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:37:31,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:37:31,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:37:31,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-21 21:37:31,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:37:31,090 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:37:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:31,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:37:31,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-10-21 21:37:31,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260438741] [2020-10-21 21:37:31,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-21 21:37:31,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:37:31,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-21 21:37:31,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=1377, Unknown=0, NotChecked=0, Total=1806 [2020-10-21 21:37:31,158 INFO L87 Difference]: Start difference. First operand 148 states and 383 transitions. Second operand 43 states. [2020-10-21 21:37:35,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:37:35,970 INFO L93 Difference]: Finished difference Result 233 states and 557 transitions. [2020-10-21 21:37:35,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-21 21:37:35,971 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-10-21 21:37:35,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:37:35,972 INFO L225 Difference]: With dead ends: 233 [2020-10-21 21:37:35,972 INFO L226 Difference]: Without dead ends: 228 [2020-10-21 21:37:35,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4244 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4513, Invalid=9767, Unknown=0, NotChecked=0, Total=14280 [2020-10-21 21:37:35,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-21 21:37:35,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 109. [2020-10-21 21:37:35,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-21 21:37:35,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 267 transitions. [2020-10-21 21:37:35,977 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 267 transitions. Word has length 46 [2020-10-21 21:37:35,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:37:35,977 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 267 transitions. [2020-10-21 21:37:35,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-21 21:37:35,977 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 267 transitions. [2020-10-21 21:37:35,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-21 21:37:35,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:37:35,977 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:37:36,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:37:36,178 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:37:36,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:37:36,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1747282856, now seen corresponding path program 93 times [2020-10-21 21:37:36,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:37:36,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738966353] [2020-10-21 21:37:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:37:36,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:37:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:37,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738966353] [2020-10-21 21:37:37,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493888969] [2020-10-21 21:37:37,236 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:37:37,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-10-21 21:37:37,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:37:37,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-21 21:37:37,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:37:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:37,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:37:37,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-10-21 21:37:37,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812411416] [2020-10-21 21:37:37,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-21 21:37:37,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:37:37,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-21 21:37:37,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2020-10-21 21:37:37,447 INFO L87 Difference]: Start difference. First operand 109 states and 267 transitions. Second operand 43 states. [2020-10-21 21:37:42,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:37:42,047 INFO L93 Difference]: Finished difference Result 241 states and 575 transitions. [2020-10-21 21:37:42,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-21 21:37:42,048 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-10-21 21:37:42,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:37:42,050 INFO L225 Difference]: With dead ends: 241 [2020-10-21 21:37:42,050 INFO L226 Difference]: Without dead ends: 232 [2020-10-21 21:37:42,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3704 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3749, Invalid=10057, Unknown=0, NotChecked=0, Total=13806 [2020-10-21 21:37:42,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-21 21:37:42,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 149. [2020-10-21 21:37:42,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-21 21:37:42,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 387 transitions. [2020-10-21 21:37:42,054 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 387 transitions. Word has length 46 [2020-10-21 21:37:42,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:37:42,054 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 387 transitions. [2020-10-21 21:37:42,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-21 21:37:42,054 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 387 transitions. [2020-10-21 21:37:42,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-21 21:37:42,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:37:42,057 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:37:42,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:37:42,263 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:37:42,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:37:42,263 INFO L82 PathProgramCache]: Analyzing trace with hash 2008401321, now seen corresponding path program 94 times [2020-10-21 21:37:42,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:37:42,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257037511] [2020-10-21 21:37:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:37:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:37:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:43,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257037511] [2020-10-21 21:37:43,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481017703] [2020-10-21 21:37:43,386 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:37:43,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:37:43,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:37:43,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-21 21:37:43,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:37:43,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:37:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:43,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:37:43,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-10-21 21:37:43,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738346869] [2020-10-21 21:37:43,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-21 21:37:43,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:37:43,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-21 21:37:43,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2020-10-21 21:37:43,560 INFO L87 Difference]: Start difference. First operand 149 states and 387 transitions. Second operand 44 states. [2020-10-21 21:37:48,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:37:48,761 INFO L93 Difference]: Finished difference Result 242 states and 577 transitions. [2020-10-21 21:37:48,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-10-21 21:37:48,763 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-10-21 21:37:48,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:37:48,764 INFO L225 Difference]: With dead ends: 242 [2020-10-21 21:37:48,764 INFO L226 Difference]: Without dead ends: 233 [2020-10-21 21:37:48,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4391 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4627, Invalid=10379, Unknown=0, NotChecked=0, Total=15006 [2020-10-21 21:37:48,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-21 21:37:48,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 109. [2020-10-21 21:37:48,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-21 21:37:48,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 267 transitions. [2020-10-21 21:37:48,768 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 267 transitions. Word has length 47 [2020-10-21 21:37:48,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:37:48,768 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 267 transitions. [2020-10-21 21:37:48,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-21 21:37:48,768 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 267 transitions. [2020-10-21 21:37:48,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-21 21:37:48,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:37:48,768 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:37:48,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-21 21:37:48,971 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:37:48,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:37:48,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1668834410, now seen corresponding path program 95 times [2020-10-21 21:37:48,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:37:48,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315719108] [2020-10-21 21:37:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:37:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:37:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:50,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315719108] [2020-10-21 21:37:50,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584530751] [2020-10-21 21:37:50,088 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:37:50,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-10-21 21:37:50,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:37:50,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-21 21:37:50,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:37:50,217 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:37:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:50,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:37:50,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-10-21 21:37:50,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028936985] [2020-10-21 21:37:50,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-21 21:37:50,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:37:50,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-21 21:37:50,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1442, Unknown=0, NotChecked=0, Total=1892 [2020-10-21 21:37:50,274 INFO L87 Difference]: Start difference. First operand 109 states and 267 transitions. Second operand 44 states. [2020-10-21 21:37:55,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:37:55,493 INFO L93 Difference]: Finished difference Result 200 states and 493 transitions. [2020-10-21 21:37:55,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-21 21:37:55,494 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-10-21 21:37:55,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:37:55,496 INFO L225 Difference]: With dead ends: 200 [2020-10-21 21:37:55,496 INFO L226 Difference]: Without dead ends: 195 [2020-10-21 21:37:55,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4541, Invalid=9979, Unknown=0, NotChecked=0, Total=14520 [2020-10-21 21:37:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-21 21:37:55,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 151. [2020-10-21 21:37:55,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-21 21:37:55,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 393 transitions. [2020-10-21 21:37:55,499 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 393 transitions. Word has length 47 [2020-10-21 21:37:55,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:37:55,500 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 393 transitions. [2020-10-21 21:37:55,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-21 21:37:55,500 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 393 transitions. [2020-10-21 21:37:55,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-21 21:37:55,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:37:55,500 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:37:55,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:37:55,701 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:37:55,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:37:55,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1782137625, now seen corresponding path program 96 times [2020-10-21 21:37:55,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:37:55,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645818778] [2020-10-21 21:37:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:37:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:37:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:57,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645818778] [2020-10-21 21:37:57,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865859196] [2020-10-21 21:37:57,265 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:37:57,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2020-10-21 21:37:57,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:37:57,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 45 conjunts are in the unsatisfiable core [2020-10-21 21:37:57,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:37:57,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:37:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:37:57,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:37:57,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2020-10-21 21:37:57,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548819257] [2020-10-21 21:37:57,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-21 21:37:57,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:37:57,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-21 21:37:57,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-10-21 21:37:57,392 INFO L87 Difference]: Start difference. First operand 151 states and 393 transitions. Second operand 44 states. [2020-10-21 21:37:59,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:37:59,858 INFO L93 Difference]: Finished difference Result 200 states and 491 transitions. [2020-10-21 21:37:59,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-21 21:37:59,860 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 48 [2020-10-21 21:37:59,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:37:59,861 INFO L225 Difference]: With dead ends: 200 [2020-10-21 21:37:59,862 INFO L226 Difference]: Without dead ends: 194 [2020-10-21 21:37:59,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2289, Invalid=4851, Unknown=0, NotChecked=0, Total=7140 [2020-10-21 21:37:59,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-21 21:37:59,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 154. [2020-10-21 21:37:59,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-21 21:37:59,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 399 transitions. [2020-10-21 21:37:59,865 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 399 transitions. Word has length 48 [2020-10-21 21:37:59,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:37:59,866 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 399 transitions. [2020-10-21 21:37:59,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-21 21:37:59,866 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 399 transitions. [2020-10-21 21:37:59,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-21 21:37:59,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:37:59,867 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:38:00,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-21 21:38:00,077 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:38:00,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:38:00,078 INFO L82 PathProgramCache]: Analyzing trace with hash 2130926905, now seen corresponding path program 97 times [2020-10-21 21:38:00,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:38:00,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795629565] [2020-10-21 21:38:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:38:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:38:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:38:01,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795629565] [2020-10-21 21:38:01,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710112782] [2020-10-21 21:38:01,274 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:38:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:38:01,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 44 conjunts are in the unsatisfiable core [2020-10-21 21:38:01,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:38:01,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:38:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:38:01,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:38:01,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-10-21 21:38:01,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139640814] [2020-10-21 21:38:01,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-21 21:38:01,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:38:01,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-21 21:38:01,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1509, Unknown=0, NotChecked=0, Total=1980 [2020-10-21 21:38:01,473 INFO L87 Difference]: Start difference. First operand 154 states and 399 transitions. Second operand 45 states. [2020-10-21 21:38:07,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:38:07,216 INFO L93 Difference]: Finished difference Result 243 states and 581 transitions. [2020-10-21 21:38:07,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-21 21:38:07,218 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2020-10-21 21:38:07,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:38:07,219 INFO L225 Difference]: With dead ends: 243 [2020-10-21 21:38:07,219 INFO L226 Difference]: Without dead ends: 238 [2020-10-21 21:38:07,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4690 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4970, Invalid=10780, Unknown=0, NotChecked=0, Total=15750 [2020-10-21 21:38:07,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-21 21:38:07,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 113. [2020-10-21 21:38:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-21 21:38:07,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 277 transitions. [2020-10-21 21:38:07,224 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 277 transitions. Word has length 48 [2020-10-21 21:38:07,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:38:07,224 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 277 transitions. [2020-10-21 21:38:07,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-21 21:38:07,224 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 277 transitions. [2020-10-21 21:38:07,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-21 21:38:07,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:38:07,225 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:38:07,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:38:07,436 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:38:07,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:38:07,437 INFO L82 PathProgramCache]: Analyzing trace with hash 194284373, now seen corresponding path program 98 times [2020-10-21 21:38:07,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:38:07,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772514519] [2020-10-21 21:38:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:38:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:38:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:38:08,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772514519] [2020-10-21 21:38:08,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762273922] [2020-10-21 21:38:08,663 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:38:08,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:38:08,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:38:08,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 44 conjunts are in the unsatisfiable core [2020-10-21 21:38:08,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:38:08,800 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:38:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:38:08,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:38:08,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-10-21 21:38:08,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442300106] [2020-10-21 21:38:08,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-21 21:38:08,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:38:08,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-21 21:38:08,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2020-10-21 21:38:08,846 INFO L87 Difference]: Start difference. First operand 113 states and 277 transitions. Second operand 45 states. Received shutdown request... [2020-10-21 21:38:14,062 WARN L210 SmtUtils]: Removed 1 from assertion stack [2020-10-21 21:38:14,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-21 21:38:14,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:38:14,264 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-21 21:38:14,268 WARN L235 ceAbstractionStarter]: Timeout [2020-10-21 21:38:14,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 09:38:14 BasicIcfg [2020-10-21 21:38:14,268 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-21 21:38:14,270 INFO L168 Benchmark]: Toolchain (without parser) took 246368.28 ms. Allocated memory was 139.5 MB in the beginning and 303.6 MB in the end (delta: 164.1 MB). Free memory was 99.6 MB in the beginning and 221.3 MB in the end (delta: -121.7 MB). Peak memory consumption was 215.8 MB. Max. memory is 7.1 GB. [2020-10-21 21:38:14,270 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-21 21:38:14,271 INFO L168 Benchmark]: CACSL2BoogieTranslator took 834.79 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 98.5 MB in the beginning and 161.3 MB in the end (delta: -62.8 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. [2020-10-21 21:38:14,271 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.37 ms. Allocated memory is still 203.9 MB. Free memory was 161.3 MB in the beginning and 159.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-21 21:38:14,271 INFO L168 Benchmark]: Boogie Preprocessor took 26.99 ms. Allocated memory is still 203.9 MB. Free memory was 159.3 MB in the beginning and 158.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-21 21:38:14,272 INFO L168 Benchmark]: RCFGBuilder took 417.14 ms. Allocated memory is still 203.9 MB. Free memory was 158.0 MB in the beginning and 136.0 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. [2020-10-21 21:38:14,272 INFO L168 Benchmark]: TraceAbstraction took 245031.20 ms. Allocated memory was 203.9 MB in the beginning and 303.6 MB in the end (delta: 99.6 MB). Free memory was 135.4 MB in the beginning and 221.3 MB in the end (delta: -85.9 MB). Peak memory consumption was 187.1 MB. Max. memory is 7.1 GB. [2020-10-21 21:38:14,273 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 834.79 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 98.5 MB in the beginning and 161.3 MB in the end (delta: -62.8 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.37 ms. Allocated memory is still 203.9 MB. Free memory was 161.3 MB in the beginning and 159.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.99 ms. Allocated memory is still 203.9 MB. Free memory was 159.3 MB in the beginning and 158.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 417.14 ms. Allocated memory is still 203.9 MB. Free memory was 158.0 MB in the beginning and 136.0 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 245031.20 ms. Allocated memory was 203.9 MB in the beginning and 303.6 MB in the end (delta: 99.6 MB). Free memory was 135.4 MB in the beginning and 221.3 MB in the end (delta: -85.9 MB). Peak memory consumption was 187.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 785 VarBasedMoverChecksPositive, 19 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.0s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - TimeoutResultAtElement [Line: 685]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 685). Cancelled while BasicCegarLoop was constructing difference of abstraction (113states) and FLOYD_HOARE automaton (currently 78 states, 45 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 12 for 23ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 244.9s, OverallIterations: 100, TraceHistogramMax: 20, AutomataDifference: 167.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 1593 SDtfs, 9415 SDslu, 12057 SDs, 0 SdLazy, 14059 SolverSat, 10294 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8722 GetRequests, 2565 SyntacticMatches, 76 SemanticMatches, 6080 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133559 ImplicationChecksByTransitivity, 180.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=98, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 99 MinimizatonAttempts, 4507 StatesRemovedByMinimization, 98 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 3.4s SatisfiabilityAnalysisTime, 46.8s InterpolantComputationTime, 5668 NumberOfCodeBlocks, 5668 NumberOfCodeBlocksAsserted, 694 NumberOfCheckSat, 5473 ConstructedInterpolants, 0 QuantifiedInterpolants, 721409 SizeOfPredicates, 2071 NumberOfNonLiveVariables, 17670 ConjunctsInSsa, 2453 ConjunctsInUnsatCore, 195 InterpolantComputations, 5 PerfectInterpolantSequences, 0/25840 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown