/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 11:36:58,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 11:36:58,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 11:36:58,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 11:36:58,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 11:36:58,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 11:36:58,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 11:36:58,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 11:36:58,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 11:36:58,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 11:36:58,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 11:36:58,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 11:36:58,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 11:36:58,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 11:36:58,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 11:36:58,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 11:36:58,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 11:36:58,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 11:36:58,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 11:36:58,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 11:36:58,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 11:36:58,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 11:36:58,819 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 11:36:58,820 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 11:36:58,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 11:36:58,822 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 11:36:58,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 11:36:58,823 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 11:36:58,824 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 11:36:58,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 11:36:58,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 11:36:58,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 11:36:58,826 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 11:36:58,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 11:36:58,828 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 11:36:58,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 11:36:58,829 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 11:36:58,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 11:36:58,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 11:36:58,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 11:36:58,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 11:36:58,832 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-10-16 11:36:58,867 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 11:36:58,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 11:36:58,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 11:36:58,869 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 11:36:58,869 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 11:36:58,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 11:36:58,869 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 11:36:58,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 11:36:58,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 11:36:58,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 11:36:58,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 11:36:58,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 11:36:58,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 11:36:58,871 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 11:36:58,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 11:36:58,871 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 11:36:58,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 11:36:58,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 11:36:58,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 11:36:58,872 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 11:36:58,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 11:36:58,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 11:36:58,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 11:36:58,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-16 11:36:58,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 11:36:58,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 11:36:58,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 11:36:58,874 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-16 11:36:58,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 11:36:59,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 11:36:59,219 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 11:36:59,223 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 11:36:59,225 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 11:36:59,225 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 11:36:59,226 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-10-16 11:36:59,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/016850928/7cd31dabadf14c659e428d800474469e/FLAG300958107 [2020-10-16 11:36:59,903 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 11:36:59,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-10-16 11:36:59,916 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/016850928/7cd31dabadf14c659e428d800474469e/FLAG300958107 [2020-10-16 11:37:00,135 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/016850928/7cd31dabadf14c659e428d800474469e [2020-10-16 11:37:00,144 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 11:37:00,146 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 11:37:00,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 11:37:00,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 11:37:00,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 11:37:00,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@271d13a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00, skipping insertion in model container [2020-10-16 11:37:00,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 11:37:00,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 11:37:00,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:37:00,751 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 11:37:00,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:37:00,906 INFO L208 MainTranslator]: Completed translation [2020-10-16 11:37:00,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00 WrapperNode [2020-10-16 11:37:00,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 11:37:00,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 11:37:00,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 11:37:00,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 11:37:00,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,947 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,975 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 11:37:00,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 11:37:00,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 11:37:00,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 11:37:00,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:00,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:01,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... [2020-10-16 11:37:01,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 11:37:01,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 11:37:01,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 11:37:01,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 11:37:01,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:01,065 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 11:37:01,065 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 11:37:01,066 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 11:37:01,066 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 11:37:01,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 11:37:01,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 11:37:01,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 11:37:01,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 11:37:01,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 11:37:01,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 11:37:01,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 11:37:01,070 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 11:37:01,430 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 11:37:01,431 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 11:37:01,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:37:01 BoogieIcfgContainer [2020-10-16 11:37:01,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 11:37:01,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 11:37:01,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 11:37:01,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 11:37:01,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 11:37:00" (1/3) ... [2020-10-16 11:37:01,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d07e37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:37:01, skipping insertion in model container [2020-10-16 11:37:01,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:00" (2/3) ... [2020-10-16 11:37:01,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d07e37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:37:01, skipping insertion in model container [2020-10-16 11:37:01,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:37:01" (3/3) ... [2020-10-16 11:37:01,443 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2020-10-16 11:37:01,456 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 11:37:01,456 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-16 11:37:01,464 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 11:37:01,464 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 11:37:01,490 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,490 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,490 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,490 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,491 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,491 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,491 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,492 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,492 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,492 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,493 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,493 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,493 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,493 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,494 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,494 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,494 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,495 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,495 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,495 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,496 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,496 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,496 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,496 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,497 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,497 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,497 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,498 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,498 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,498 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,502 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,502 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,502 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,503 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,503 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,503 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,508 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,509 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,509 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,509 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,509 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,510 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:01,512 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 11:37:01,524 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 11:37:01,543 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:37:01,543 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:37:01,544 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 11:37:01,544 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:37:01,544 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:37:01,544 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:37:01,544 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:37:01,544 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:37:01,556 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 11:37:01,557 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-16 11:37:01,560 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-16 11:37:01,562 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-16 11:37:01,603 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-16 11:37:01,604 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 11:37:01,609 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-16 11:37:01,612 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-16 11:37:02,652 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-16 11:37:02,734 INFO L132 LiptonReduction]: Checked pairs total: 943 [2020-10-16 11:37:02,735 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-16 11:37:02,743 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-16 11:37:02,762 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-16 11:37:02,765 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-16 11:37:02,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-16 11:37:02,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:02,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 11:37:02,795 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:02,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:02,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-10-16 11:37:02,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:02,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634571364] [2020-10-16 11:37:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:03,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634571364] [2020-10-16 11:37:03,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:03,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 11:37:03,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165073492] [2020-10-16 11:37:03,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 11:37:03,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:03,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 11:37:03,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 11:37:03,122 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-16 11:37:03,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:03,198 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-16 11:37:03,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:37:03,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-16 11:37:03,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:03,213 INFO L225 Difference]: With dead ends: 83 [2020-10-16 11:37:03,213 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 11:37:03,215 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 [2020-10-16 11:37:03,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 11:37:03,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-16 11:37:03,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:37:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-16 11:37:03,263 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-16 11:37:03,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:03,263 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-16 11:37:03,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 11:37:03,264 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-16 11:37:03,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 11:37:03,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:03,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:03,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 11:37:03,266 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:03,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:03,267 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-10-16 11:37:03,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:03,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936386102] [2020-10-16 11:37:03,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:03,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936386102] [2020-10-16 11:37:03,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:03,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:37:03,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455045815] [2020-10-16 11:37:03,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 11:37:03,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:03,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 11:37:03,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:37:03,392 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-16 11:37:03,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:03,457 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-16 11:37:03,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:03,457 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 11:37:03,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:03,459 INFO L225 Difference]: With dead ends: 80 [2020-10-16 11:37:03,460 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 11:37:03,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:37:03,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 11:37:03,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-16 11:37:03,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 11:37:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-16 11:37:03,471 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-16 11:37:03,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:03,472 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-16 11:37:03,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 11:37:03,473 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-16 11:37:03,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 11:37:03,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:03,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:03,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 11:37:03,474 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:03,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:03,475 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-10-16 11:37:03,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:03,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070143151] [2020-10-16 11:37:03,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:03,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070143151] [2020-10-16 11:37:03,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:03,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:37:03,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764059194] [2020-10-16 11:37:03,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 11:37:03,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:03,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 11:37:03,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:37:03,559 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-16 11:37:03,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:03,594 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-16 11:37:03,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:37:03,596 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 11:37:03,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:03,598 INFO L225 Difference]: With dead ends: 73 [2020-10-16 11:37:03,598 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 11:37:03,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:37:03,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 11:37:03,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-16 11:37:03,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:37:03,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-16 11:37:03,608 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-16 11:37:03,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:03,609 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-16 11:37:03,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 11:37:03,609 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-16 11:37:03,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 11:37:03,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:03,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:03,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 11:37:03,610 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:03,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:03,611 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-10-16 11:37:03,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:03,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412354011] [2020-10-16 11:37:03,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:03,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412354011] [2020-10-16 11:37:03,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:03,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:37:03,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654881322] [2020-10-16 11:37:03,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 11:37:03,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:03,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 11:37:03,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:37:03,673 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-16 11:37:03,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:03,730 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-16 11:37:03,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:03,731 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 11:37:03,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:03,732 INFO L225 Difference]: With dead ends: 86 [2020-10-16 11:37:03,732 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 11:37:03,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:37:03,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 11:37:03,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-16 11:37:03,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:37:03,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-16 11:37:03,743 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-16 11:37:03,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:03,744 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-16 11:37:03,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 11:37:03,744 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-16 11:37:03,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 11:37:03,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:03,745 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:03,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 11:37:03,746 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:03,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:03,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-10-16 11:37:03,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:03,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226924564] [2020-10-16 11:37:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:03,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:03,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226924564] [2020-10-16 11:37:03,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439882686] [2020-10-16 11:37:03,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:03,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:03,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:03,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:37:03,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:03,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:04,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:04,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-16 11:37:04,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114334837] [2020-10-16 11:37:04,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:37:04,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:04,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:37:04,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:37:04,022 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-16 11:37:04,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:04,103 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-16 11:37:04,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:04,104 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-16 11:37:04,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:04,105 INFO L225 Difference]: With dead ends: 101 [2020-10-16 11:37:04,105 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 11:37:04,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 11:37:04,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-16 11:37:04,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 11:37:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-16 11:37:04,115 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-16 11:37:04,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:04,116 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-16 11:37:04,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:37:04,116 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-16 11:37:04,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 11:37:04,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:04,117 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:04,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:04,331 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:04,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:04,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-10-16 11:37:04,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:04,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562374237] [2020-10-16 11:37:04,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:04,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562374237] [2020-10-16 11:37:04,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173026899] [2020-10-16 11:37:04,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:04,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:04,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:04,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:37:04,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:04,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:04,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 11:37:04,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432487773] [2020-10-16 11:37:04,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:37:04,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:04,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:37:04,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:04,567 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-16 11:37:04,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:04,600 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-16 11:37:04,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 11:37:04,601 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 11:37:04,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:04,602 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:37:04,602 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 11:37:04,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:04,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 11:37:04,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-16 11:37:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:37:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-16 11:37:04,619 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-16 11:37:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:04,620 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-16 11:37:04,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:37:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-16 11:37:04,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 11:37:04,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:04,624 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:04,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:04,825 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:04,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:04,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-10-16 11:37:04,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:04,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086849833] [2020-10-16 11:37:04,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:04,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086849833] [2020-10-16 11:37:04,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068081113] [2020-10-16 11:37:04,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:04,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:04,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:04,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:37:04,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:05,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:05,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 11:37:05,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441989005] [2020-10-16 11:37:05,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:37:05,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:05,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:37:05,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:05,066 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-16 11:37:05,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:05,116 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-16 11:37:05,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:05,116 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 11:37:05,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:05,117 INFO L225 Difference]: With dead ends: 90 [2020-10-16 11:37:05,117 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 11:37:05,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:37:05,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 11:37:05,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-16 11:37:05,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:37:05,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-16 11:37:05,133 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-16 11:37:05,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:05,133 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-16 11:37:05,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:37:05,133 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-16 11:37:05,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 11:37:05,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:05,138 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:05,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:05,339 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:05,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:05,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-10-16 11:37:05,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:05,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626635060] [2020-10-16 11:37:05,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:05,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626635060] [2020-10-16 11:37:05,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805778019] [2020-10-16 11:37:05,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:05,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:05,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:05,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:37:05,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:05,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:05,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:05,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 11:37:05,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574467646] [2020-10-16 11:37:05,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:37:05,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:05,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:37:05,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:05,533 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-16 11:37:05,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:05,629 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-16 11:37:05,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:05,630 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-16 11:37:05,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:05,631 INFO L225 Difference]: With dead ends: 99 [2020-10-16 11:37:05,631 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:37:05,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:05,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:37:05,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-16 11:37:05,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 11:37:05,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-16 11:37:05,639 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-16 11:37:05,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:05,639 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-16 11:37:05,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:37:05,640 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-16 11:37:05,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:05,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:05,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:05,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:05,857 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:05,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:05,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-10-16 11:37:05,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:05,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439801013] [2020-10-16 11:37:05,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:05,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439801013] [2020-10-16 11:37:05,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:05,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:37:05,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256164679] [2020-10-16 11:37:05,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:05,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:05,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:05,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:05,931 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-16 11:37:05,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:05,958 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-16 11:37:05,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 11:37:05,959 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:37:05,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:05,960 INFO L225 Difference]: With dead ends: 92 [2020-10-16 11:37:05,960 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:37:05,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:05,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:37:05,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-16 11:37:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 11:37:05,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-16 11:37:05,967 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-16 11:37:05,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:05,967 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-16 11:37:05,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:05,967 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-16 11:37:05,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:05,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:05,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:05,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-16 11:37:05,969 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:05,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:05,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-10-16 11:37:05,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:05,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602468122] [2020-10-16 11:37:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:06,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602468122] [2020-10-16 11:37:06,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:06,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:37:06,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334715963] [2020-10-16 11:37:06,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:06,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:06,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:06,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:06,040 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-16 11:37:06,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:06,098 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-16 11:37:06,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:06,099 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:37:06,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:06,100 INFO L225 Difference]: With dead ends: 100 [2020-10-16 11:37:06,100 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:37:06,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:37:06,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:37:06,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-16 11:37:06,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 11:37:06,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-16 11:37:06,114 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-16 11:37:06,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:06,115 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-16 11:37:06,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:06,115 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-16 11:37:06,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:06,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:06,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:06,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-16 11:37:06,118 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:06,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:06,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-10-16 11:37:06,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:06,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677826596] [2020-10-16 11:37:06,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:06,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677826596] [2020-10-16 11:37:06,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:06,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:37:06,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601014483] [2020-10-16 11:37:06,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:06,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:06,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:06,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:06,216 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-16 11:37:06,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:06,289 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-16 11:37:06,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:06,290 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:37:06,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:06,291 INFO L225 Difference]: With dead ends: 105 [2020-10-16 11:37:06,291 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 11:37:06,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:06,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 11:37:06,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-16 11:37:06,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:37:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-16 11:37:06,301 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-16 11:37:06,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:06,302 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-16 11:37:06,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:06,302 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-16 11:37:06,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:06,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:06,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:06,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-16 11:37:06,305 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:06,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:06,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-10-16 11:37:06,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:06,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286547933] [2020-10-16 11:37:06,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:06,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286547933] [2020-10-16 11:37:06,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:06,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:37:06,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797619097] [2020-10-16 11:37:06,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:06,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:06,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:06,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:06,366 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-16 11:37:06,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:06,456 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-16 11:37:06,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:06,457 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:37:06,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:06,458 INFO L225 Difference]: With dead ends: 105 [2020-10-16 11:37:06,458 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 11:37:06,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:06,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 11:37:06,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-16 11:37:06,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:37:06,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-16 11:37:06,466 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-16 11:37:06,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:06,466 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-16 11:37:06,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:06,467 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-16 11:37:06,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:06,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:06,468 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:06,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-16 11:37:06,469 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:06,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:06,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-10-16 11:37:06,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:06,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328393083] [2020-10-16 11:37:06,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:06,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328393083] [2020-10-16 11:37:06,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693153619] [2020-10-16 11:37:06,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:06,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:06,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:06,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:06,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:06,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:06,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:06,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-16 11:37:06,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362561115] [2020-10-16 11:37:06,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:37:06,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:06,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:37:06,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:06,769 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-16 11:37:06,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:06,861 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-16 11:37:06,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:06,862 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-16 11:37:06,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:06,863 INFO L225 Difference]: With dead ends: 122 [2020-10-16 11:37:06,863 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:37:06,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:06,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:37:06,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-16 11:37:06,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 11:37:06,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-16 11:37:06,869 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-16 11:37:06,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:06,869 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-16 11:37:06,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:37:06,869 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-16 11:37:06,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:06,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:06,870 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:07,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 11:37:07,081 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:07,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:07,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-10-16 11:37:07,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:07,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66296365] [2020-10-16 11:37:07,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:07,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66296365] [2020-10-16 11:37:07,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130038480] [2020-10-16 11:37:07,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:07,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:07,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:07,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:07,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:07,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:07,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:07,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:07,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092247281] [2020-10-16 11:37:07,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:07,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:07,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:07,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:07,380 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-16 11:37:07,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:07,448 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-16 11:37:07,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:07,448 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 11:37:07,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:07,449 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:37:07,450 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 11:37:07,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:07,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 11:37:07,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-16 11:37:07,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-16 11:37:07,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-16 11:37:07,457 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-16 11:37:07,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:07,458 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-16 11:37:07,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:07,458 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-16 11:37:07,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:07,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:07,459 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:07,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:07,673 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:07,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:07,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-10-16 11:37:07,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:07,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583396605] [2020-10-16 11:37:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:07,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583396605] [2020-10-16 11:37:07,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659010874] [2020-10-16 11:37:07,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:07,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:07,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:07,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:07,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:07,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488516591] [2020-10-16 11:37:07,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:07,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:07,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:07,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:07,923 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-16 11:37:07,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:07,993 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-16 11:37:07,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:07,993 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 11:37:07,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:07,997 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:37:07,998 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:37:07,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:07,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:37:08,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-16 11:37:08,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:37:08,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-16 11:37:08,005 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-16 11:37:08,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:08,006 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-16 11:37:08,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:08,006 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-16 11:37:08,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:08,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:08,007 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:08,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 11:37:08,220 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:08,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:08,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-10-16 11:37:08,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:08,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457201931] [2020-10-16 11:37:08,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:08,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457201931] [2020-10-16 11:37:08,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202342249] [2020-10-16 11:37:08,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:08,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:08,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:08,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:08,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:08,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:08,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:08,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699677741] [2020-10-16 11:37:08,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:08,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:08,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:08,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:08,419 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-16 11:37:08,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:08,504 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-16 11:37:08,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:08,504 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 11:37:08,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:08,505 INFO L225 Difference]: With dead ends: 115 [2020-10-16 11:37:08,506 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 11:37:08,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:08,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 11:37:08,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-16 11:37:08,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 11:37:08,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-16 11:37:08,511 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-16 11:37:08,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:08,512 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-16 11:37:08,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:08,512 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-16 11:37:08,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:08,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:08,513 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:08,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 11:37:08,725 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:08,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:08,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-10-16 11:37:08,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:08,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725925816] [2020-10-16 11:37:08,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:08,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725925816] [2020-10-16 11:37:08,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389178649] [2020-10-16 11:37:08,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:08,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:08,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:08,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:08,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:08,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:08,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:08,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:08,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796477626] [2020-10-16 11:37:08,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:08,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:08,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:08,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:08,951 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-16 11:37:09,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:09,062 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-16 11:37:09,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:09,063 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-16 11:37:09,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:09,064 INFO L225 Difference]: With dead ends: 124 [2020-10-16 11:37:09,064 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 11:37:09,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:09,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 11:37:09,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-16 11:37:09,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 11:37:09,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-16 11:37:09,067 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-16 11:37:09,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:09,068 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-16 11:37:09,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:09,068 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-16 11:37:09,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:09,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:09,068 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:09,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 11:37:09,270 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:09,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:09,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-10-16 11:37:09,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:09,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921370009] [2020-10-16 11:37:09,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:09,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921370009] [2020-10-16 11:37:09,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885722876] [2020-10-16 11:37:09,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:09,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:09,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:09,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:09,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:09,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:09,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:09,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254445146] [2020-10-16 11:37:09,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:09,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:09,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:09,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:09,460 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-16 11:37:09,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:09,500 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-16 11:37:09,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:09,500 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:09,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:09,501 INFO L225 Difference]: With dead ends: 113 [2020-10-16 11:37:09,501 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 11:37:09,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:09,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 11:37:09,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-16 11:37:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-16 11:37:09,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-16 11:37:09,506 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-16 11:37:09,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:09,507 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-16 11:37:09,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:09,507 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-16 11:37:09,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:09,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:09,508 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:09,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 11:37:09,720 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:09,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:09,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-10-16 11:37:09,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:09,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478536469] [2020-10-16 11:37:09,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:09,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478536469] [2020-10-16 11:37:09,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572871341] [2020-10-16 11:37:09,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:09,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:09,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:09,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:09,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:09,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:09,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:09,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646729748] [2020-10-16 11:37:09,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:09,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:09,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:09,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:09,895 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-16 11:37:09,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:09,955 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-16 11:37:09,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:09,955 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:09,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:09,956 INFO L225 Difference]: With dead ends: 118 [2020-10-16 11:37:09,957 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 11:37:09,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:09,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 11:37:09,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-16 11:37:09,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-16 11:37:09,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-16 11:37:09,961 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-16 11:37:09,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:09,962 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-16 11:37:09,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:09,962 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-16 11:37:09,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:09,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:09,963 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:10,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:10,174 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:10,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:10,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-10-16 11:37:10,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:10,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175705322] [2020-10-16 11:37:10,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:10,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:10,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175705322] [2020-10-16 11:37:10,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040909366] [2020-10-16 11:37:10,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:10,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:10,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:10,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:10,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:10,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212976675] [2020-10-16 11:37:10,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:10,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:10,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:10,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:10,352 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-16 11:37:10,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:10,423 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-16 11:37:10,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:10,424 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:10,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:10,425 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:37:10,425 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:37:10,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:10,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:37:10,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-16 11:37:10,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-16 11:37:10,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-16 11:37:10,430 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-16 11:37:10,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:10,431 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-16 11:37:10,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:10,431 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-16 11:37:10,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:10,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:10,432 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:10,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:10,643 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:10,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:10,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-10-16 11:37:10,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:10,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498037728] [2020-10-16 11:37:10,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:10,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498037728] [2020-10-16 11:37:10,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534044864] [2020-10-16 11:37:10,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:10,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:10,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:10,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:10,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:10,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:10,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:10,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103919849] [2020-10-16 11:37:10,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:10,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:10,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:10,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:10,861 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-16 11:37:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:10,927 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-16 11:37:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:10,928 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:10,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:10,929 INFO L225 Difference]: With dead ends: 122 [2020-10-16 11:37:10,929 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 11:37:10,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:10,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 11:37:10,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-16 11:37:10,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-16 11:37:10,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-16 11:37:10,934 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-16 11:37:10,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:10,934 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-16 11:37:10,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:10,935 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-16 11:37:10,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:10,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:10,935 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:11,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-16 11:37:11,146 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:11,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:11,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-10-16 11:37:11,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:11,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086189089] [2020-10-16 11:37:11,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:11,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086189089] [2020-10-16 11:37:11,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987369916] [2020-10-16 11:37:11,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:11,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:11,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:11,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:11,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:11,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:11,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:11,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54726341] [2020-10-16 11:37:11,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:11,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:11,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:11,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:11,332 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-16 11:37:11,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:11,432 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-16 11:37:11,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:11,432 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:11,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:11,433 INFO L225 Difference]: With dead ends: 123 [2020-10-16 11:37:11,434 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 11:37:11,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:11,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 11:37:11,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-16 11:37:11,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 11:37:11,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-16 11:37:11,438 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-16 11:37:11,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:11,438 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-16 11:37:11,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:11,439 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-16 11:37:11,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:11,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:11,439 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:11,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:11,649 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:11,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:11,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-10-16 11:37:11,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:11,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837700377] [2020-10-16 11:37:11,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:11,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837700377] [2020-10-16 11:37:11,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036061911] [2020-10-16 11:37:11,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:11,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:11,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:11,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:11,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:11,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:11,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:11,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121636204] [2020-10-16 11:37:11,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:11,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:11,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:11,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:11,845 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-16 11:37:11,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:11,917 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-16 11:37:11,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:11,918 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:11,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:11,919 INFO L225 Difference]: With dead ends: 123 [2020-10-16 11:37:11,919 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 11:37:11,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:11,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 11:37:11,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-16 11:37:11,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-16 11:37:11,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-16 11:37:11,924 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-16 11:37:11,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:11,924 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-16 11:37:11,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:11,924 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-16 11:37:11,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:11,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:11,927 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:12,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 11:37:12,128 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:12,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:12,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-10-16 11:37:12,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:12,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034288801] [2020-10-16 11:37:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:12,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034288801] [2020-10-16 11:37:12,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229291036] [2020-10-16 11:37:12,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:12,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:12,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:12,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:12,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:12,299 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:12,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:12,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:12,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138317326] [2020-10-16 11:37:12,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:12,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:12,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:12,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:12,343 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-16 11:37:12,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:12,517 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-16 11:37:12,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:12,517 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:12,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:12,519 INFO L225 Difference]: With dead ends: 133 [2020-10-16 11:37:12,519 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 11:37:12,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:12,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 11:37:12,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-16 11:37:12,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-16 11:37:12,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-16 11:37:12,524 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-16 11:37:12,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:12,524 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-16 11:37:12,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:12,524 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-16 11:37:12,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:12,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:12,525 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:12,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:12,736 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:12,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:12,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-10-16 11:37:12,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:12,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216749934] [2020-10-16 11:37:12,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:12,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:12,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216749934] [2020-10-16 11:37:12,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991048063] [2020-10-16 11:37:12,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:12,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:12,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:12,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:12,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:12,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:12,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:12,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571728760] [2020-10-16 11:37:12,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:12,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:12,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:12,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:12,947 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-16 11:37:13,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:13,053 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-16 11:37:13,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:13,053 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:13,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:13,055 INFO L225 Difference]: With dead ends: 127 [2020-10-16 11:37:13,055 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 11:37:13,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 11:37:13,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-16 11:37:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-16 11:37:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-16 11:37:13,060 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-16 11:37:13,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:13,060 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-16 11:37:13,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:13,060 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-16 11:37:13,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:13,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:13,061 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:13,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 11:37:13,274 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:13,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:13,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-10-16 11:37:13,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:13,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158894575] [2020-10-16 11:37:13,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:13,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158894575] [2020-10-16 11:37:13,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164369290] [2020-10-16 11:37:13,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:13,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:13,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:13,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:13,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:13,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:13,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368276844] [2020-10-16 11:37:13,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:13,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:13,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:13,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:13,434 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-16 11:37:13,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:13,634 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-16 11:37:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:13,634 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:13,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:13,636 INFO L225 Difference]: With dead ends: 141 [2020-10-16 11:37:13,636 INFO L226 Difference]: Without dead ends: 136 [2020-10-16 11:37:13,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:13,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-16 11:37:13,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-16 11:37:13,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-16 11:37:13,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-16 11:37:13,641 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-16 11:37:13,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:13,641 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-16 11:37:13,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:13,642 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-16 11:37:13,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:13,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:13,642 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:13,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 11:37:13,854 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:13,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:13,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-10-16 11:37:13,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:13,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880885344] [2020-10-16 11:37:13,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:13,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880885344] [2020-10-16 11:37:13,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560276291] [2020-10-16 11:37:13,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:13,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:13,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:13,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:13,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:14,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:14,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:14,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:14,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779275834] [2020-10-16 11:37:14,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:14,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:14,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:14,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:14,042 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-16 11:37:14,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:14,195 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-16 11:37:14,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:14,196 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:14,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:14,197 INFO L225 Difference]: With dead ends: 136 [2020-10-16 11:37:14,198 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 11:37:14,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:14,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 11:37:14,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-16 11:37:14,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 11:37:14,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-16 11:37:14,202 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-16 11:37:14,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:14,202 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-16 11:37:14,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:14,203 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-16 11:37:14,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:14,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:14,203 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:14,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-16 11:37:14,414 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:14,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:14,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-10-16 11:37:14,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:14,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113850681] [2020-10-16 11:37:14,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:14,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113850681] [2020-10-16 11:37:14,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636760348] [2020-10-16 11:37:14,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:14,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:14,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:14,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:14,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:14,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:14,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:14,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518999162] [2020-10-16 11:37:14,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:14,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:14,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:14,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:14,564 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-16 11:37:14,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:14,657 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-16 11:37:14,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:14,657 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:14,658 INFO L225 Difference]: With dead ends: 130 [2020-10-16 11:37:14,659 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 11:37:14,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:14,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 11:37:14,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-16 11:37:14,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 11:37:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-16 11:37:14,663 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-16 11:37:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:14,663 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-16 11:37:14,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-16 11:37:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:14,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:14,664 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:14,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 11:37:14,874 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:14,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:14,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-10-16 11:37:14,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:14,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726883669] [2020-10-16 11:37:14,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:14,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726883669] [2020-10-16 11:37:14,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146485247] [2020-10-16 11:37:14,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:14,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:14,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:14,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:14,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:15,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:15,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:15,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016703367] [2020-10-16 11:37:15,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:15,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:15,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:15,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:15,054 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-16 11:37:15,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:15,184 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-16 11:37:15,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:15,185 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:15,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:15,186 INFO L225 Difference]: With dead ends: 131 [2020-10-16 11:37:15,186 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 11:37:15,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:15,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 11:37:15,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-16 11:37:15,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 11:37:15,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-16 11:37:15,191 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-16 11:37:15,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:15,192 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-16 11:37:15,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:15,192 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-16 11:37:15,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:15,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:15,193 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:15,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 11:37:15,394 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:15,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:15,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-10-16 11:37:15,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:15,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541243752] [2020-10-16 11:37:15,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:15,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541243752] [2020-10-16 11:37:15,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560772153] [2020-10-16 11:37:15,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:15,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:15,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:15,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:15,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:15,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:15,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:15,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:15,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384618868] [2020-10-16 11:37:15,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:15,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:15,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:15,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:15,560 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-16 11:37:15,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:15,698 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-16 11:37:15,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:15,698 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:15,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:15,699 INFO L225 Difference]: With dead ends: 131 [2020-10-16 11:37:15,699 INFO L226 Difference]: Without dead ends: 126 [2020-10-16 11:37:15,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:15,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-16 11:37:15,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-16 11:37:15,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-16 11:37:15,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-16 11:37:15,704 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-16 11:37:15,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:15,704 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-16 11:37:15,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:15,705 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-16 11:37:15,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:15,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:15,705 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:15,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:15,915 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:15,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:15,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-10-16 11:37:15,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:15,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712356811] [2020-10-16 11:37:15,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:15,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712356811] [2020-10-16 11:37:15,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076928295] [2020-10-16 11:37:15,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:16,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:16,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:16,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:16,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:16,081 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:16,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:16,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:16,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188846623] [2020-10-16 11:37:16,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:16,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:16,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:16,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:16,090 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-16 11:37:16,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:16,302 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-16 11:37:16,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:16,303 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:16,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:16,305 INFO L225 Difference]: With dead ends: 145 [2020-10-16 11:37:16,305 INFO L226 Difference]: Without dead ends: 140 [2020-10-16 11:37:16,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:16,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-16 11:37:16,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-16 11:37:16,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-16 11:37:16,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-16 11:37:16,310 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-16 11:37:16,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:16,310 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-16 11:37:16,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:16,310 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-16 11:37:16,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:16,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:16,311 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:16,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-16 11:37:16,520 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:16,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:16,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-10-16 11:37:16,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:16,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895150662] [2020-10-16 11:37:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:16,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895150662] [2020-10-16 11:37:16,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741880448] [2020-10-16 11:37:16,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:16,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:16,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:16,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:16,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:16,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:16,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899456050] [2020-10-16 11:37:16,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:37:16,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:16,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:37:16,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:37:16,676 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-16 11:37:16,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:16,894 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-16 11:37:16,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:16,895 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-16 11:37:16,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:16,896 INFO L225 Difference]: With dead ends: 135 [2020-10-16 11:37:16,897 INFO L226 Difference]: Without dead ends: 130 [2020-10-16 11:37:16,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:16,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-16 11:37:16,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-16 11:37:16,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-16 11:37:16,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-16 11:37:16,902 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-16 11:37:16,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:16,902 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-16 11:37:16,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:37:16,902 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-16 11:37:16,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:16,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:16,903 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:17,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:17,114 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:17,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:17,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-10-16 11:37:17,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:17,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537056036] [2020-10-16 11:37:17,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:17,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537056036] [2020-10-16 11:37:17,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443188827] [2020-10-16 11:37:17,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:17,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:17,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:17,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:17,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:17,400 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:17,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:17,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-16 11:37:17,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360923016] [2020-10-16 11:37:17,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:37:17,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:17,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:37:17,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:17,426 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-16 11:37:17,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:17,548 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-16 11:37:17,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:17,549 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-16 11:37:17,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:17,550 INFO L225 Difference]: With dead ends: 143 [2020-10-16 11:37:17,550 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 11:37:17,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:17,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 11:37:17,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-16 11:37:17,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-16 11:37:17,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-16 11:37:17,557 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-16 11:37:17,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:17,557 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-16 11:37:17,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:37:17,557 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-16 11:37:17,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:17,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:17,558 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:17,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-16 11:37:17,770 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:17,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:17,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-10-16 11:37:17,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:17,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191033611] [2020-10-16 11:37:17,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:17,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191033611] [2020-10-16 11:37:17,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914323471] [2020-10-16 11:37:17,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:17,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:17,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:17,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:17,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:18,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:18,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:18,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168817772] [2020-10-16 11:37:18,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:18,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:18,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:18,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:18,030 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-16 11:37:18,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:18,071 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-16 11:37:18,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:18,071 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 11:37:18,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:18,072 INFO L225 Difference]: With dead ends: 132 [2020-10-16 11:37:18,072 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 11:37:18,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:18,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 11:37:18,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-16 11:37:18,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-16 11:37:18,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-16 11:37:18,077 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-16 11:37:18,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:18,077 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-16 11:37:18,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:18,077 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-16 11:37:18,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:18,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:18,078 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:18,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 11:37:18,288 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:18,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:18,288 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-10-16 11:37:18,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:18,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22338038] [2020-10-16 11:37:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:18,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22338038] [2020-10-16 11:37:18,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297434111] [2020-10-16 11:37:18,377 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:18,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:18,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:18,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:18,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:18,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:18,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:18,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172983935] [2020-10-16 11:37:18,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:18,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:18,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:18,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:18,576 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-16 11:37:18,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:18,648 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-16 11:37:18,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:18,648 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 11:37:18,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:18,650 INFO L225 Difference]: With dead ends: 143 [2020-10-16 11:37:18,650 INFO L226 Difference]: Without dead ends: 140 [2020-10-16 11:37:18,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:18,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-16 11:37:18,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-16 11:37:18,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-16 11:37:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-16 11:37:18,654 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-16 11:37:18,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:18,655 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-16 11:37:18,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:18,655 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-16 11:37:18,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:18,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:18,657 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:18,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-16 11:37:18,869 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:18,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:18,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-10-16 11:37:18,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:18,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958026345] [2020-10-16 11:37:18,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:18,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958026345] [2020-10-16 11:37:18,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629572862] [2020-10-16 11:37:18,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:18,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:37:18,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:18,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:18,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:19,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:19,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:19,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854041070] [2020-10-16 11:37:19,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:19,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:19,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:19,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:19,076 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-16 11:37:19,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:19,151 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-16 11:37:19,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:19,152 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 11:37:19,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:19,153 INFO L225 Difference]: With dead ends: 142 [2020-10-16 11:37:19,153 INFO L226 Difference]: Without dead ends: 139 [2020-10-16 11:37:19,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:19,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-16 11:37:19,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-16 11:37:19,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-16 11:37:19,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-16 11:37:19,157 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-16 11:37:19,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:19,158 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-16 11:37:19,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:19,158 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-16 11:37:19,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:19,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:19,159 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:19,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 11:37:19,369 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:19,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:19,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-10-16 11:37:19,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:19,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938118893] [2020-10-16 11:37:19,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:19,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938118893] [2020-10-16 11:37:19,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928946262] [2020-10-16 11:37:19,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:19,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:19,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:19,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:19,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:19,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111203668] [2020-10-16 11:37:19,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:19,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:19,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:19,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:19,571 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-16 11:37:19,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:19,676 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-16 11:37:19,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:19,676 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 11:37:19,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:19,677 INFO L225 Difference]: With dead ends: 141 [2020-10-16 11:37:19,677 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 11:37:19,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:19,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 11:37:19,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-16 11:37:19,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-16 11:37:19,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-16 11:37:19,682 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-16 11:37:19,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:19,682 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-16 11:37:19,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:19,682 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-16 11:37:19,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:37:19,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:19,683 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:19,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 11:37:19,884 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:19,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:19,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-10-16 11:37:19,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:19,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789387657] [2020-10-16 11:37:19,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:19,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789387657] [2020-10-16 11:37:19,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993989014] [2020-10-16 11:37:19,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:19,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:19,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:19,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:19,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:20,081 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:20,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:20,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:20,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130196939] [2020-10-16 11:37:20,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:20,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:20,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:20,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:20,094 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-16 11:37:20,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:20,228 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-16 11:37:20,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:20,228 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-16 11:37:20,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:20,230 INFO L225 Difference]: With dead ends: 150 [2020-10-16 11:37:20,230 INFO L226 Difference]: Without dead ends: 144 [2020-10-16 11:37:20,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:20,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-16 11:37:20,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-16 11:37:20,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-16 11:37:20,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-16 11:37:20,235 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-16 11:37:20,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:20,235 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-16 11:37:20,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:20,235 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-16 11:37:20,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:20,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:20,236 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:20,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:20,448 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:20,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:20,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-10-16 11:37:20,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:20,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868987790] [2020-10-16 11:37:20,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:20,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868987790] [2020-10-16 11:37:20,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369229543] [2020-10-16 11:37:20,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:20,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:20,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:20,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:20,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:20,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:20,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:20,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668763234] [2020-10-16 11:37:20,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:20,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:20,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:20,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:20,705 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-16 11:37:20,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:20,769 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-16 11:37:20,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:20,770 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:20,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:20,772 INFO L225 Difference]: With dead ends: 138 [2020-10-16 11:37:20,772 INFO L226 Difference]: Without dead ends: 136 [2020-10-16 11:37:20,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:20,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-16 11:37:20,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-16 11:37:20,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-16 11:37:20,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-16 11:37:20,778 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-16 11:37:20,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:20,778 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-16 11:37:20,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:20,779 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-16 11:37:20,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:20,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:20,780 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:20,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 11:37:20,993 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:20,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:20,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-10-16 11:37:20,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:20,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162056006] [2020-10-16 11:37:20,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:21,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162056006] [2020-10-16 11:37:21,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342897455] [2020-10-16 11:37:21,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:21,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:21,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:21,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:21,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:21,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:21,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:21,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945840225] [2020-10-16 11:37:21,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:21,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:21,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:21,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:21,293 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-16 11:37:21,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:21,438 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-16 11:37:21,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:21,439 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:21,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:21,440 INFO L225 Difference]: With dead ends: 145 [2020-10-16 11:37:21,441 INFO L226 Difference]: Without dead ends: 143 [2020-10-16 11:37:21,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:21,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-16 11:37:21,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-16 11:37:21,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-16 11:37:21,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-16 11:37:21,447 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-16 11:37:21,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:21,447 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-16 11:37:21,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:21,447 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-16 11:37:21,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:21,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:21,448 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:21,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 11:37:21,662 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:21,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:21,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-10-16 11:37:21,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:21,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729677157] [2020-10-16 11:37:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:21,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729677157] [2020-10-16 11:37:21,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333280716] [2020-10-16 11:37:21,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:21,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:21,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:21,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:21,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:21,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:21,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:21,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906684901] [2020-10-16 11:37:21,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:21,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:21,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:21,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:21,863 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-16 11:37:21,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:21,982 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-16 11:37:21,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:21,983 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:21,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:21,984 INFO L225 Difference]: With dead ends: 150 [2020-10-16 11:37:21,984 INFO L226 Difference]: Without dead ends: 148 [2020-10-16 11:37:21,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:21,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-16 11:37:21,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-16 11:37:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-16 11:37:21,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-16 11:37:21,989 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-16 11:37:21,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:21,990 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-16 11:37:21,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:21,990 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-16 11:37:21,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:21,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:21,991 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:22,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:22,202 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:22,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:22,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-10-16 11:37:22,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:22,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027735248] [2020-10-16 11:37:22,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:22,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:22,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027735248] [2020-10-16 11:37:22,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703620817] [2020-10-16 11:37:22,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:22,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:22,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:22,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:22,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:22,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:22,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:22,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290811483] [2020-10-16 11:37:22,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:22,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:22,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:22,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:22,396 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-16 11:37:22,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:22,487 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-16 11:37:22,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:22,488 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:22,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:22,489 INFO L225 Difference]: With dead ends: 148 [2020-10-16 11:37:22,489 INFO L226 Difference]: Without dead ends: 146 [2020-10-16 11:37:22,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:22,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-16 11:37:22,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-16 11:37:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:22,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-16 11:37:22,494 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-16 11:37:22,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:22,494 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-16 11:37:22,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:22,494 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-16 11:37:22,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:22,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:22,495 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:22,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 11:37:22,704 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:22,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:22,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-10-16 11:37:22,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:22,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979971916] [2020-10-16 11:37:22,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:22,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:22,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979971916] [2020-10-16 11:37:22,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238964942] [2020-10-16 11:37:22,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:22,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:22,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:22,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:22,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:22,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:22,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:22,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326692605] [2020-10-16 11:37:22,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:22,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:22,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:22,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:22,958 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-16 11:37:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:23,067 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-16 11:37:23,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:23,068 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:23,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:23,069 INFO L225 Difference]: With dead ends: 149 [2020-10-16 11:37:23,069 INFO L226 Difference]: Without dead ends: 147 [2020-10-16 11:37:23,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:23,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-16 11:37:23,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-16 11:37:23,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:37:23,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-16 11:37:23,073 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-16 11:37:23,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:23,073 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-16 11:37:23,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:23,074 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-16 11:37:23,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:23,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:23,074 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:23,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:23,285 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:23,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:23,286 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-10-16 11:37:23,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:23,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479083867] [2020-10-16 11:37:23,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:23,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479083867] [2020-10-16 11:37:23,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250741272] [2020-10-16 11:37:23,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:23,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:23,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:23,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:23,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:23,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:23,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459530170] [2020-10-16 11:37:23,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:23,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:23,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:23,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:23,520 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-16 11:37:23,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:23,580 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-16 11:37:23,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:23,582 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:23,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:23,583 INFO L225 Difference]: With dead ends: 152 [2020-10-16 11:37:23,583 INFO L226 Difference]: Without dead ends: 150 [2020-10-16 11:37:23,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:23,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-16 11:37:23,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-16 11:37:23,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 11:37:23,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-16 11:37:23,587 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-16 11:37:23,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:23,587 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-16 11:37:23,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:23,588 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-16 11:37:23,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:23,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:23,588 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:23,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 11:37:23,797 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:23,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:23,797 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-10-16 11:37:23,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:23,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302474408] [2020-10-16 11:37:23,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:23,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302474408] [2020-10-16 11:37:23,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925124538] [2020-10-16 11:37:23,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:23,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:23,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:23,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:23,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:24,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:24,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:24,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383121765] [2020-10-16 11:37:24,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:24,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:24,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:24,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:24,016 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-16 11:37:24,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:24,162 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-16 11:37:24,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:24,162 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:24,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:24,164 INFO L225 Difference]: With dead ends: 153 [2020-10-16 11:37:24,164 INFO L226 Difference]: Without dead ends: 151 [2020-10-16 11:37:24,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:24,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-16 11:37:24,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-16 11:37:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:24,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-16 11:37:24,168 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-16 11:37:24,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:24,168 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-16 11:37:24,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-16 11:37:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:24,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:24,169 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:24,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-16 11:37:24,370 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:24,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:24,371 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-10-16 11:37:24,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:24,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872766292] [2020-10-16 11:37:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:24,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872766292] [2020-10-16 11:37:24,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097741267] [2020-10-16 11:37:24,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:24,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:24,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:24,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:24,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:24,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:24,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:24,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553885021] [2020-10-16 11:37:24,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:24,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:24,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:24,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:24,576 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-16 11:37:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:24,730 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-16 11:37:24,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:24,730 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:24,732 INFO L225 Difference]: With dead ends: 156 [2020-10-16 11:37:24,732 INFO L226 Difference]: Without dead ends: 154 [2020-10-16 11:37:24,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:24,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-16 11:37:24,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-16 11:37:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-16 11:37:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-16 11:37:24,736 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-16 11:37:24,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:24,736 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-16 11:37:24,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:24,736 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-16 11:37:24,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:24,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:24,737 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:24,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-16 11:37:24,947 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:24,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:24,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-10-16 11:37:24,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:24,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001965310] [2020-10-16 11:37:24,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:25,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001965310] [2020-10-16 11:37:25,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023832170] [2020-10-16 11:37:25,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:25,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:25,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:25,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:25,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:25,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:25,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:25,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731945604] [2020-10-16 11:37:25,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:25,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:25,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:25,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:25,218 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-16 11:37:25,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:25,316 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-16 11:37:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:25,317 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:25,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:25,319 INFO L225 Difference]: With dead ends: 148 [2020-10-16 11:37:25,319 INFO L226 Difference]: Without dead ends: 146 [2020-10-16 11:37:25,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:25,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-16 11:37:25,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-16 11:37:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 11:37:25,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-16 11:37:25,327 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-16 11:37:25,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:25,327 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-16 11:37:25,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:25,327 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-16 11:37:25,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:25,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:25,328 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:25,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-16 11:37:25,529 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:25,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:25,530 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-10-16 11:37:25,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:25,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628449703] [2020-10-16 11:37:25,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:25,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628449703] [2020-10-16 11:37:25,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273448242] [2020-10-16 11:37:25,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:25,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:25,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:25,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:25,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:25,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:25,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:25,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802616082] [2020-10-16 11:37:25,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:25,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:25,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:25,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:25,772 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-16 11:37:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:25,931 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-16 11:37:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:25,931 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:25,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:25,932 INFO L225 Difference]: With dead ends: 157 [2020-10-16 11:37:25,932 INFO L226 Difference]: Without dead ends: 155 [2020-10-16 11:37:25,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:25,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-16 11:37:25,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-16 11:37:25,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:25,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-16 11:37:25,936 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-16 11:37:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:25,937 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-16 11:37:25,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:25,937 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-16 11:37:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:25,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:25,937 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:26,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:26,138 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:26,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:26,139 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-10-16 11:37:26,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:26,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579330908] [2020-10-16 11:37:26,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:26,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579330908] [2020-10-16 11:37:26,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729656485] [2020-10-16 11:37:26,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:26,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:26,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:26,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:37:26,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:26,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:26,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 11:37:26,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935824710] [2020-10-16 11:37:26,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:37:26,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:26,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:37:26,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:37:26,264 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-10-16 11:37:26,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:26,347 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-16 11:37:26,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:26,347 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 11:37:26,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:26,349 INFO L225 Difference]: With dead ends: 149 [2020-10-16 11:37:26,349 INFO L226 Difference]: Without dead ends: 147 [2020-10-16 11:37:26,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-16 11:37:26,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-16 11:37:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 11:37:26,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 11:37:26,353 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 11:37:26,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:26,353 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 11:37:26,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:37:26,354 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 11:37:26,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:26,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:26,354 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:26,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 11:37:26,555 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:26,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:26,556 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-10-16 11:37:26,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:26,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674064758] [2020-10-16 11:37:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:26,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:26,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674064758] [2020-10-16 11:37:26,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838059742] [2020-10-16 11:37:26,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:26,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:26,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:26,739 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:26,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:26,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:26,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647232243] [2020-10-16 11:37:26,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:26,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:26,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:26,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:26,779 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-16 11:37:27,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:27,018 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-16 11:37:27,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:27,018 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:27,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:27,020 INFO L225 Difference]: With dead ends: 164 [2020-10-16 11:37:27,020 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 11:37:27,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:27,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 11:37:27,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-16 11:37:27,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 11:37:27,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-16 11:37:27,024 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-16 11:37:27,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:27,025 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-16 11:37:27,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:27,025 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-16 11:37:27,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:27,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:27,026 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:27,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-16 11:37:27,238 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:27,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:27,238 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-10-16 11:37:27,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:27,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086631249] [2020-10-16 11:37:27,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:27,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086631249] [2020-10-16 11:37:27,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507285335] [2020-10-16 11:37:27,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:27,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:27,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:27,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:27,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:27,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:27,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:27,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724454583] [2020-10-16 11:37:27,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:27,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:27,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:27,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:27,447 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-16 11:37:27,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:27,625 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-16 11:37:27,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:27,625 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:27,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:27,626 INFO L225 Difference]: With dead ends: 156 [2020-10-16 11:37:27,627 INFO L226 Difference]: Without dead ends: 154 [2020-10-16 11:37:27,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:27,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-16 11:37:27,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-16 11:37:27,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 11:37:27,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 11:37:27,631 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 11:37:27,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:27,632 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 11:37:27,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:27,632 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 11:37:27,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:27,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:27,633 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:27,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:27,835 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:27,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:27,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-10-16 11:37:27,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:27,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640499593] [2020-10-16 11:37:27,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:27,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640499593] [2020-10-16 11:37:27,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352978942] [2020-10-16 11:37:27,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:27,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:27,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:27,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:27,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:28,020 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:28,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:28,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:28,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294586587] [2020-10-16 11:37:28,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:28,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:28,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:28,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:28,052 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-16 11:37:28,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:28,400 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-16 11:37:28,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:37:28,401 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:28,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:28,402 INFO L225 Difference]: With dead ends: 176 [2020-10-16 11:37:28,402 INFO L226 Difference]: Without dead ends: 171 [2020-10-16 11:37:28,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:37:28,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-16 11:37:28,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-16 11:37:28,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-16 11:37:28,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-16 11:37:28,407 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-16 11:37:28,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:28,408 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-16 11:37:28,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:28,408 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-16 11:37:28,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:28,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:28,409 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:28,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-16 11:37:28,615 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:28,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:28,615 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-10-16 11:37:28,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:28,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347962691] [2020-10-16 11:37:28,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:28,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:28,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347962691] [2020-10-16 11:37:28,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109627992] [2020-10-16 11:37:28,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:28,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:28,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:28,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:28,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:28,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:28,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:28,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:28,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815656682] [2020-10-16 11:37:28,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:28,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:28,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:28,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:28,815 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-16 11:37:29,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:29,059 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-16 11:37:29,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:29,060 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:29,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:29,061 INFO L225 Difference]: With dead ends: 166 [2020-10-16 11:37:29,061 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 11:37:29,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:29,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 11:37:29,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-16 11:37:29,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 11:37:29,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-16 11:37:29,066 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-16 11:37:29,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:29,066 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-16 11:37:29,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:29,066 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-16 11:37:29,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:29,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:29,067 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:29,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:29,277 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:29,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:29,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-10-16 11:37:29,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:29,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293910921] [2020-10-16 11:37:29,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:29,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293910921] [2020-10-16 11:37:29,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118852071] [2020-10-16 11:37:29,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:29,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:29,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:29,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:29,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:29,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:29,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:29,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:29,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117992493] [2020-10-16 11:37:29,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:29,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:29,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:29,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:29,468 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-16 11:37:29,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:29,649 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-16 11:37:29,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:29,649 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:29,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:29,651 INFO L225 Difference]: With dead ends: 163 [2020-10-16 11:37:29,651 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 11:37:29,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:29,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 11:37:29,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-16 11:37:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-16 11:37:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-16 11:37:29,655 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-16 11:37:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:29,655 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-16 11:37:29,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:29,655 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-16 11:37:29,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:29,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:29,656 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:29,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-16 11:37:29,857 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:29,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:29,857 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-10-16 11:37:29,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:29,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826582981] [2020-10-16 11:37:29,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:29,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826582981] [2020-10-16 11:37:29,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394088056] [2020-10-16 11:37:29,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:29,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:29,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:29,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:29,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:30,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:30,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:30,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598276201] [2020-10-16 11:37:30,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:30,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:30,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:30,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:30,053 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-16 11:37:30,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:30,318 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-16 11:37:30,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:37:30,318 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:30,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:30,320 INFO L225 Difference]: With dead ends: 170 [2020-10-16 11:37:30,320 INFO L226 Difference]: Without dead ends: 168 [2020-10-16 11:37:30,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:37:30,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-16 11:37:30,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-16 11:37:30,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-16 11:37:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-16 11:37:30,325 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-16 11:37:30,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:30,325 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-16 11:37:30,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-16 11:37:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:30,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:30,326 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:30,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:30,536 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:30,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:30,536 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-10-16 11:37:30,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:30,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482782700] [2020-10-16 11:37:30,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:30,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482782700] [2020-10-16 11:37:30,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145312487] [2020-10-16 11:37:30,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:30,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:30,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:30,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:30,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:30,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:30,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526336520] [2020-10-16 11:37:30,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:30,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:30,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:30,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:30,714 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-16 11:37:31,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:31,041 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-16 11:37:31,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:37:31,042 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:31,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:31,043 INFO L225 Difference]: With dead ends: 177 [2020-10-16 11:37:31,044 INFO L226 Difference]: Without dead ends: 172 [2020-10-16 11:37:31,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:37:31,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-16 11:37:31,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-16 11:37:31,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-16 11:37:31,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-16 11:37:31,049 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-16 11:37:31,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:31,049 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-16 11:37:31,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:31,049 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-16 11:37:31,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:31,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:31,050 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:31,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-16 11:37:31,261 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:31,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-10-16 11:37:31,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:31,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117054592] [2020-10-16 11:37:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:31,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117054592] [2020-10-16 11:37:31,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542582736] [2020-10-16 11:37:31,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:31,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:31,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:31,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:31,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:31,427 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:31,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:31,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:31,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288021404] [2020-10-16 11:37:31,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:31,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:31,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:31,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:31,435 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-16 11:37:31,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:31,814 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-16 11:37:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:37:31,814 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:31,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:31,816 INFO L225 Difference]: With dead ends: 190 [2020-10-16 11:37:31,816 INFO L226 Difference]: Without dead ends: 182 [2020-10-16 11:37:31,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:37:31,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-16 11:37:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-16 11:37:31,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 11:37:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-16 11:37:31,820 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-16 11:37:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:31,820 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-16 11:37:31,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:31,820 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-16 11:37:31,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:31,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:31,821 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:32,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 11:37:32,032 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:32,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:32,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-10-16 11:37:32,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:32,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215325526] [2020-10-16 11:37:32,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:32,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215325526] [2020-10-16 11:37:32,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842180816] [2020-10-16 11:37:32,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:32,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:37:32,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:32,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:37:32,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:32,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:32,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-10-16 11:37:32,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86890036] [2020-10-16 11:37:32,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:37:32,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:32,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:37:32,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:32,185 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 12 states. [2020-10-16 11:37:32,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:32,565 INFO L93 Difference]: Finished difference Result 177 states and 419 transitions. [2020-10-16 11:37:32,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:37:32,566 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-10-16 11:37:32,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:32,567 INFO L225 Difference]: With dead ends: 177 [2020-10-16 11:37:32,567 INFO L226 Difference]: Without dead ends: 172 [2020-10-16 11:37:32,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:37:32,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-16 11:37:32,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 120. [2020-10-16 11:37:32,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:32,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-16 11:37:32,571 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-16 11:37:32,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:32,572 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-16 11:37:32,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:37:32,572 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-16 11:37:32,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:32,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:32,572 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:32,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-16 11:37:32,773 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:32,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:32,774 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-10-16 11:37:32,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:32,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054560947] [2020-10-16 11:37:32,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:32,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:32,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:32,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054560947] [2020-10-16 11:37:32,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347878342] [2020-10-16 11:37:32,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:32,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:32,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:32,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:32,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:32,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:32,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:32,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347046803] [2020-10-16 11:37:32,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:32,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:32,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:32,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:32,973 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-16 11:37:33,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:33,110 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-16 11:37:33,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:33,110 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:33,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:33,112 INFO L225 Difference]: With dead ends: 164 [2020-10-16 11:37:33,112 INFO L226 Difference]: Without dead ends: 162 [2020-10-16 11:37:33,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:33,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-16 11:37:33,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-16 11:37:33,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 11:37:33,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-16 11:37:33,116 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-16 11:37:33,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:33,116 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-16 11:37:33,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:33,116 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-16 11:37:33,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:33,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:33,117 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:33,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-16 11:37:33,319 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:33,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:33,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-10-16 11:37:33,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:33,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336221351] [2020-10-16 11:37:33,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:33,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336221351] [2020-10-16 11:37:33,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115473737] [2020-10-16 11:37:33,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:33,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:33,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:33,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:33,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:33,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:33,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:33,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679949625] [2020-10-16 11:37:33,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:33,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:33,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:33,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:33,511 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-16 11:37:33,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:33,665 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-16 11:37:33,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:33,666 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:33,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:33,667 INFO L225 Difference]: With dead ends: 161 [2020-10-16 11:37:33,667 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 11:37:33,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:33,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 11:37:33,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-16 11:37:33,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:37:33,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-16 11:37:33,672 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-16 11:37:33,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:33,673 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-16 11:37:33,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:33,673 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-16 11:37:33,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:33,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:33,674 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:33,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-16 11:37:33,885 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:33,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:33,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-10-16 11:37:33,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:33,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18757583] [2020-10-16 11:37:33,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:33,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18757583] [2020-10-16 11:37:33,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818519159] [2020-10-16 11:37:33,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:33,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:37:33,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:33,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:33,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:34,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:34,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:34,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663149860] [2020-10-16 11:37:34,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:34,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:34,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:34,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:34,097 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-16 11:37:34,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:34,297 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-16 11:37:34,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:37:34,298 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:34,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:34,300 INFO L225 Difference]: With dead ends: 165 [2020-10-16 11:37:34,300 INFO L226 Difference]: Without dead ends: 163 [2020-10-16 11:37:34,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:34,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-16 11:37:34,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-16 11:37:34,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:37:34,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-16 11:37:34,303 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-16 11:37:34,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:34,303 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-16 11:37:34,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:34,303 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-16 11:37:34,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:34,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:34,304 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:34,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-16 11:37:34,505 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:34,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:34,505 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-10-16 11:37:34,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:34,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324130034] [2020-10-16 11:37:34,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:34,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324130034] [2020-10-16 11:37:34,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584323047] [2020-10-16 11:37:34,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:34,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:34,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:34,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:34,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:34,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899085362] [2020-10-16 11:37:34,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:34,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:34,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:34,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:34,689 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-16 11:37:34,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:34,893 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-16 11:37:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:37:34,893 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:34,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:34,895 INFO L225 Difference]: With dead ends: 167 [2020-10-16 11:37:34,895 INFO L226 Difference]: Without dead ends: 165 [2020-10-16 11:37:34,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:34,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-16 11:37:34,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-16 11:37:34,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:37:34,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-16 11:37:34,899 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-16 11:37:34,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:34,899 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-16 11:37:34,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:34,899 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-16 11:37:34,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:34,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:34,900 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:35,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:35,110 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:35,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:35,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-10-16 11:37:35,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:35,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237117236] [2020-10-16 11:37:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:35,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237117236] [2020-10-16 11:37:35,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835802949] [2020-10-16 11:37:35,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:35,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:35,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:35,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:35,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:35,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:35,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:35,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49804363] [2020-10-16 11:37:35,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:35,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:35,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:35,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:35,306 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-16 11:37:35,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:35,567 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-16 11:37:35,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:37:35,567 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:35,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:35,569 INFO L225 Difference]: With dead ends: 168 [2020-10-16 11:37:35,569 INFO L226 Difference]: Without dead ends: 166 [2020-10-16 11:37:35,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:35,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-16 11:37:35,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-16 11:37:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-16 11:37:35,573 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-16 11:37:35,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:35,573 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-16 11:37:35,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:35,573 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-16 11:37:35,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:35,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:35,574 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:35,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:35,775 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:35,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:35,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-10-16 11:37:35,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:35,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064345531] [2020-10-16 11:37:35,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:35,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064345531] [2020-10-16 11:37:35,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913846975] [2020-10-16 11:37:35,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:35,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:35,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:35,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:35,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:35,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:35,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:35,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:35,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721684249] [2020-10-16 11:37:35,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:35,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:35,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:35,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:35,955 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-16 11:37:36,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:36,154 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-16 11:37:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:36,154 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:36,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:36,156 INFO L225 Difference]: With dead ends: 160 [2020-10-16 11:37:36,156 INFO L226 Difference]: Without dead ends: 155 [2020-10-16 11:37:36,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:36,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-16 11:37:36,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-16 11:37:36,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-16 11:37:36,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-16 11:37:36,160 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-16 11:37:36,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:36,160 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-16 11:37:36,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:36,160 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-16 11:37:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:36,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:36,161 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:36,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:36,373 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:36,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:36,374 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-10-16 11:37:36,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:36,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474843915] [2020-10-16 11:37:36,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:36,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474843915] [2020-10-16 11:37:36,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37248623] [2020-10-16 11:37:36,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:36,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:36,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:36,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:36,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:36,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:36,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:36,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:36,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275866235] [2020-10-16 11:37:36,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:36,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:36,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:36,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:36,585 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-16 11:37:36,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:36,950 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-16 11:37:36,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:37:36,951 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:36,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:36,952 INFO L225 Difference]: With dead ends: 189 [2020-10-16 11:37:36,952 INFO L226 Difference]: Without dead ends: 181 [2020-10-16 11:37:36,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:37:36,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-16 11:37:36,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-16 11:37:36,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-16 11:37:36,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-16 11:37:36,956 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-16 11:37:36,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:36,957 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-16 11:37:36,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:36,957 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-16 11:37:36,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:36,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:36,958 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:37,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:37,169 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:37,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:37,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-10-16 11:37:37,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:37,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898044133] [2020-10-16 11:37:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:37,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898044133] [2020-10-16 11:37:37,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56867830] [2020-10-16 11:37:37,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:37,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:37,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:37,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:37,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:37,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:37,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:37,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919174484] [2020-10-16 11:37:37,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:37,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:37,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:37,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:37,349 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-16 11:37:37,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:37,596 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-16 11:37:37,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:37:37,596 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:37,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:37,598 INFO L225 Difference]: With dead ends: 169 [2020-10-16 11:37:37,598 INFO L226 Difference]: Without dead ends: 167 [2020-10-16 11:37:37,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:37,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-16 11:37:37,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-16 11:37:37,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-16 11:37:37,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-16 11:37:37,602 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-16 11:37:37,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:37,602 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-16 11:37:37,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:37,602 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-16 11:37:37,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:37,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:37,603 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:37,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-16 11:37:37,804 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:37,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:37,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-10-16 11:37:37,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:37,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844802567] [2020-10-16 11:37:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:37,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844802567] [2020-10-16 11:37:37,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274560059] [2020-10-16 11:37:37,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:37,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:37,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:37,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:37,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:37,964 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:37,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:37,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:37,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432878015] [2020-10-16 11:37:37,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:37,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:37,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:37,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:37,973 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-16 11:37:38,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:38,324 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-16 11:37:38,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:37:38,325 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:38,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:38,326 INFO L225 Difference]: With dead ends: 192 [2020-10-16 11:37:38,326 INFO L226 Difference]: Without dead ends: 184 [2020-10-16 11:37:38,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:37:38,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-16 11:37:38,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-16 11:37:38,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-16 11:37:38,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-16 11:37:38,330 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-16 11:37:38,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:38,330 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-16 11:37:38,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:38,330 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-16 11:37:38,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:38,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:38,331 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:38,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:38,531 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:38,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:38,532 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-10-16 11:37:38,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:38,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145240369] [2020-10-16 11:37:38,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:38,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145240369] [2020-10-16 11:37:38,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744398319] [2020-10-16 11:37:38,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:38,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:38,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:38,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:38,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:38,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:38,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746184603] [2020-10-16 11:37:38,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:37:38,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:38,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:37:38,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:37:38,712 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-16 11:37:39,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:39,037 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-16 11:37:39,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:37:39,038 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-16 11:37:39,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:39,039 INFO L225 Difference]: With dead ends: 180 [2020-10-16 11:37:39,039 INFO L226 Difference]: Without dead ends: 175 [2020-10-16 11:37:39,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:37:39,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-16 11:37:39,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-16 11:37:39,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-16 11:37:39,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-16 11:37:39,043 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-16 11:37:39,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:39,044 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-16 11:37:39,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:37:39,044 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-16 11:37:39,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:39,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:39,044 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:39,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-16 11:37:39,248 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:39,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:39,248 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-10-16 11:37:39,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:39,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396546408] [2020-10-16 11:37:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:39,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396546408] [2020-10-16 11:37:39,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196548848] [2020-10-16 11:37:39,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:39,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:39,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:39,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:39,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:39,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:39,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:39,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-16 11:37:39,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345177809] [2020-10-16 11:37:39,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:37:39,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:39,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:37:39,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:39,486 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-16 11:37:39,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:39,642 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-16 11:37:39,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:39,643 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-16 11:37:39,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:39,644 INFO L225 Difference]: With dead ends: 164 [2020-10-16 11:37:39,644 INFO L226 Difference]: Without dead ends: 159 [2020-10-16 11:37:39,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:37:39,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-16 11:37:39,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-16 11:37:39,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-16 11:37:39,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-16 11:37:39,647 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-16 11:37:39,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:39,648 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-16 11:37:39,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:37:39,648 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-16 11:37:39,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:39,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:39,648 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:39,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:39,849 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:39,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:39,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-10-16 11:37:39,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:39,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290413489] [2020-10-16 11:37:39,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:39,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:39,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290413489] [2020-10-16 11:37:39,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034497176] [2020-10-16 11:37:39,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:40,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:37:40,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:40,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:40,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:40,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:40,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:40,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703297813] [2020-10-16 11:37:40,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:40,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:40,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:40,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:40,130 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-16 11:37:40,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:40,178 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-16 11:37:40,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:40,178 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:40,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:40,180 INFO L225 Difference]: With dead ends: 156 [2020-10-16 11:37:40,180 INFO L226 Difference]: Without dead ends: 153 [2020-10-16 11:37:40,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:40,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-16 11:37:40,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-16 11:37:40,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-16 11:37:40,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-16 11:37:40,185 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-16 11:37:40,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:40,185 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-16 11:37:40,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:40,185 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-16 11:37:40,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:40,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:40,186 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:40,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-16 11:37:40,397 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:40,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-10-16 11:37:40,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:40,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082578062] [2020-10-16 11:37:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:40,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082578062] [2020-10-16 11:37:40,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52287546] [2020-10-16 11:37:40,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:40,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:40,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:40,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:40,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:40,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:40,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:40,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977591161] [2020-10-16 11:37:40,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:40,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:40,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:40,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:40,654 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-16 11:37:40,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:40,720 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-16 11:37:40,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:40,720 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:40,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:40,722 INFO L225 Difference]: With dead ends: 170 [2020-10-16 11:37:40,722 INFO L226 Difference]: Without dead ends: 167 [2020-10-16 11:37:40,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:40,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-16 11:37:40,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-16 11:37:40,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-16 11:37:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-16 11:37:40,725 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-16 11:37:40,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:40,726 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-16 11:37:40,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:40,726 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-16 11:37:40,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:40,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:40,727 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:40,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:40,929 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:40,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:40,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-10-16 11:37:40,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:40,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731440262] [2020-10-16 11:37:40,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:41,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731440262] [2020-10-16 11:37:41,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394545383] [2020-10-16 11:37:41,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:41,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:41,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:41,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:41,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:41,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:41,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:41,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955394534] [2020-10-16 11:37:41,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:41,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:41,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:41,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:41,181 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-16 11:37:41,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:41,259 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-16 11:37:41,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:41,260 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:41,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:41,261 INFO L225 Difference]: With dead ends: 169 [2020-10-16 11:37:41,261 INFO L226 Difference]: Without dead ends: 166 [2020-10-16 11:37:41,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:41,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-16 11:37:41,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-16 11:37:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-16 11:37:41,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-16 11:37:41,265 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-16 11:37:41,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:41,265 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-16 11:37:41,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:41,266 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-16 11:37:41,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:41,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:41,266 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:41,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:41,475 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:41,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:41,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-10-16 11:37:41,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:41,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531515818] [2020-10-16 11:37:41,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:41,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531515818] [2020-10-16 11:37:41,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054896241] [2020-10-16 11:37:41,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:41,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:37:41,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:41,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:41,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:41,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:41,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:41,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697886750] [2020-10-16 11:37:41,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:41,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:41,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:41,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:41,810 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-16 11:37:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:41,908 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-16 11:37:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:41,908 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:41,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:41,910 INFO L225 Difference]: With dead ends: 168 [2020-10-16 11:37:41,910 INFO L226 Difference]: Without dead ends: 165 [2020-10-16 11:37:41,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:41,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-16 11:37:41,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-16 11:37:41,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-16 11:37:41,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-16 11:37:41,913 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-16 11:37:41,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:41,914 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-16 11:37:41,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:41,914 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-16 11:37:41,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:41,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:41,914 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:42,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-16 11:37:42,124 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:42,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:42,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-10-16 11:37:42,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:42,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475944247] [2020-10-16 11:37:42,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:42,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475944247] [2020-10-16 11:37:42,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496561059] [2020-10-16 11:37:42,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:42,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:42,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:42,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:42,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:42,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249442805] [2020-10-16 11:37:42,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:42,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:42,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:42,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:42,356 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-16 11:37:42,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:42,487 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-16 11:37:42,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:42,488 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:42,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:42,489 INFO L225 Difference]: With dead ends: 167 [2020-10-16 11:37:42,489 INFO L226 Difference]: Without dead ends: 164 [2020-10-16 11:37:42,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:42,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-16 11:37:42,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-16 11:37:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-16 11:37:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-16 11:37:42,493 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-16 11:37:42,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:42,493 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-16 11:37:42,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:42,493 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-16 11:37:42,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:37:42,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:42,493 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:42,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:42,694 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:42,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:42,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-10-16 11:37:42,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:42,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405788482] [2020-10-16 11:37:42,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:42,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405788482] [2020-10-16 11:37:42,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017039126] [2020-10-16 11:37:42,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:42,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:42,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:42,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:42,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:42,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:42,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:42,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:42,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784695926] [2020-10-16 11:37:42,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:42,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:42,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:42,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:42,929 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-16 11:37:43,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:43,102 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-16 11:37:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:43,103 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-16 11:37:43,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:43,104 INFO L225 Difference]: With dead ends: 176 [2020-10-16 11:37:43,104 INFO L226 Difference]: Without dead ends: 170 [2020-10-16 11:37:43,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:43,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-16 11:37:43,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-16 11:37:43,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-16 11:37:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-16 11:37:43,107 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-16 11:37:43,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:43,107 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-16 11:37:43,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:43,108 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-16 11:37:43,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:43,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:43,108 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:43,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:43,310 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:43,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:43,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-10-16 11:37:43,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:43,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782356522] [2020-10-16 11:37:43,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:43,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782356522] [2020-10-16 11:37:43,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697295713] [2020-10-16 11:37:43,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:43,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:43,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:43,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:43,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:43,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:43,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:43,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368413131] [2020-10-16 11:37:43,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:43,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:43,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:43,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:43,588 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-16 11:37:43,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:43,649 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-16 11:37:43,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:43,649 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:43,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:43,651 INFO L225 Difference]: With dead ends: 163 [2020-10-16 11:37:43,651 INFO L226 Difference]: Without dead ends: 161 [2020-10-16 11:37:43,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:43,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-16 11:37:43,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-16 11:37:43,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-16 11:37:43,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-16 11:37:43,656 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-16 11:37:43,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:43,657 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-16 11:37:43,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:43,657 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-16 11:37:43,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:43,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:43,658 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:43,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-16 11:37:43,869 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:43,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:43,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-10-16 11:37:43,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:43,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611945576] [2020-10-16 11:37:43,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:43,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611945576] [2020-10-16 11:37:43,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372999618] [2020-10-16 11:37:43,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:44,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:44,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:44,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:44,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:44,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:44,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:44,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984994127] [2020-10-16 11:37:44,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:44,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:44,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:44,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:44,219 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-16 11:37:44,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:44,413 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-16 11:37:44,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:44,414 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:44,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:44,416 INFO L225 Difference]: With dead ends: 172 [2020-10-16 11:37:44,416 INFO L226 Difference]: Without dead ends: 170 [2020-10-16 11:37:44,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:44,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-16 11:37:44,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-16 11:37:44,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 11:37:44,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-16 11:37:44,421 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-16 11:37:44,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:44,422 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-16 11:37:44,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:44,422 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-16 11:37:44,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:44,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:44,423 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:44,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:44,635 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:44,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:44,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-10-16 11:37:44,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:44,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288708564] [2020-10-16 11:37:44,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:44,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288708564] [2020-10-16 11:37:44,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830217702] [2020-10-16 11:37:44,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:44,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:44,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:44,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:44,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:44,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:44,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:44,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654668537] [2020-10-16 11:37:44,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:44,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:44,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:44,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:44,950 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-16 11:37:45,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:45,143 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-16 11:37:45,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:45,144 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:45,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:45,145 INFO L225 Difference]: With dead ends: 179 [2020-10-16 11:37:45,145 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 11:37:45,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:45,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 11:37:45,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-16 11:37:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-16 11:37:45,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-16 11:37:45,148 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-16 11:37:45,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:45,149 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-16 11:37:45,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:45,149 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-16 11:37:45,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:45,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:45,150 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:45,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-16 11:37:45,359 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:45,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:45,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-10-16 11:37:45,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:45,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922196144] [2020-10-16 11:37:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:45,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922196144] [2020-10-16 11:37:45,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055897325] [2020-10-16 11:37:45,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:45,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:45,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:45,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:45,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:45,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:45,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:45,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144239393] [2020-10-16 11:37:45,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:45,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:45,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:45,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:45,596 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-16 11:37:45,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:45,778 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-16 11:37:45,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:45,779 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:45,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:45,780 INFO L225 Difference]: With dead ends: 179 [2020-10-16 11:37:45,780 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 11:37:45,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:45,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 11:37:45,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-16 11:37:45,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 11:37:45,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-16 11:37:45,784 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-16 11:37:45,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:45,784 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-16 11:37:45,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:45,785 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-16 11:37:45,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:45,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:45,785 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:45,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-16 11:37:45,996 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:45,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:45,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-10-16 11:37:45,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:45,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333578545] [2020-10-16 11:37:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:46,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333578545] [2020-10-16 11:37:46,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316017239] [2020-10-16 11:37:46,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:46,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:46,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:46,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:46,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:46,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:46,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:46,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179528549] [2020-10-16 11:37:46,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:46,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:46,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:46,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:46,248 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-16 11:37:46,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:46,452 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-16 11:37:46,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:46,452 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:46,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:46,454 INFO L225 Difference]: With dead ends: 184 [2020-10-16 11:37:46,454 INFO L226 Difference]: Without dead ends: 182 [2020-10-16 11:37:46,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:46,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-16 11:37:46,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-16 11:37:46,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 11:37:46,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-16 11:37:46,457 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-16 11:37:46,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:46,458 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-16 11:37:46,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:46,458 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-16 11:37:46,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:46,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:46,458 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:46,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-16 11:37:46,659 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:46,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:46,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-10-16 11:37:46,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:46,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974561228] [2020-10-16 11:37:46,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:46,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974561228] [2020-10-16 11:37:46,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476720561] [2020-10-16 11:37:46,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:46,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:46,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:46,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:46,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:46,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818225912] [2020-10-16 11:37:46,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:46,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:46,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:46,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:46,907 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-16 11:37:47,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:47,133 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-16 11:37:47,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:47,133 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:47,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:47,135 INFO L225 Difference]: With dead ends: 179 [2020-10-16 11:37:47,135 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 11:37:47,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:47,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 11:37:47,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-16 11:37:47,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-16 11:37:47,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-16 11:37:47,138 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-16 11:37:47,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:47,139 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-16 11:37:47,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:47,139 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-16 11:37:47,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:47,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:47,140 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:47,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:47,342 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:47,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:47,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-10-16 11:37:47,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:47,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121257211] [2020-10-16 11:37:47,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:47,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121257211] [2020-10-16 11:37:47,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657929811] [2020-10-16 11:37:47,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:47,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:47,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:47,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:47,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:47,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:47,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:47,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090974516] [2020-10-16 11:37:47,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:47,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:47,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:47,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:47,632 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-16 11:37:47,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:47,776 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-16 11:37:47,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:47,776 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:47,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:47,777 INFO L225 Difference]: With dead ends: 176 [2020-10-16 11:37:47,778 INFO L226 Difference]: Without dead ends: 174 [2020-10-16 11:37:47,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:47,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-16 11:37:47,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-16 11:37:47,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:37:47,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-16 11:37:47,781 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-16 11:37:47,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:47,782 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-16 11:37:47,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:47,782 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-16 11:37:47,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:47,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:47,783 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:47,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:47,992 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:47,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:47,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-10-16 11:37:47,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:47,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338990782] [2020-10-16 11:37:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:48,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338990782] [2020-10-16 11:37:48,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234147285] [2020-10-16 11:37:48,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:48,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:37:48,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:48,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:48,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:48,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:48,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:48,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777853437] [2020-10-16 11:37:48,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:48,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:48,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:48,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:48,261 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-16 11:37:48,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:48,502 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-16 11:37:48,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:48,503 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:48,505 INFO L225 Difference]: With dead ends: 185 [2020-10-16 11:37:48,505 INFO L226 Difference]: Without dead ends: 183 [2020-10-16 11:37:48,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:48,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-16 11:37:48,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-16 11:37:48,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:37:48,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-16 11:37:48,511 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-16 11:37:48,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:48,511 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-16 11:37:48,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:48,511 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-16 11:37:48,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:48,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:48,512 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:48,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:48,724 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:48,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:48,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-10-16 11:37:48,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:48,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004142666] [2020-10-16 11:37:48,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:48,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004142666] [2020-10-16 11:37:48,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414604169] [2020-10-16 11:37:48,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:48,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:48,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:48,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:48,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:48,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:48,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:48,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109258231] [2020-10-16 11:37:48,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:48,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:48,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:48,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:48,965 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-16 11:37:49,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:49,207 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-16 11:37:49,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:49,208 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:49,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:49,209 INFO L225 Difference]: With dead ends: 185 [2020-10-16 11:37:49,209 INFO L226 Difference]: Without dead ends: 183 [2020-10-16 11:37:49,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:49,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-16 11:37:49,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-16 11:37:49,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-16 11:37:49,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-16 11:37:49,213 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-16 11:37:49,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:49,214 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-16 11:37:49,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:49,214 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-16 11:37:49,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:49,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:49,215 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:49,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:49,425 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:49,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:49,426 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-10-16 11:37:49,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:49,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198628975] [2020-10-16 11:37:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:49,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198628975] [2020-10-16 11:37:49,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196552460] [2020-10-16 11:37:49,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:49,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:49,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:49,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:49,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:49,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:49,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:49,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942076327] [2020-10-16 11:37:49,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:49,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:49,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:49,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:49,732 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-16 11:37:49,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:49,808 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-16 11:37:49,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:37:49,809 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:49,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:49,810 INFO L225 Difference]: With dead ends: 182 [2020-10-16 11:37:49,810 INFO L226 Difference]: Without dead ends: 180 [2020-10-16 11:37:49,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:49,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-16 11:37:49,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-16 11:37:49,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 11:37:49,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-16 11:37:49,816 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-16 11:37:49,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:49,816 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-16 11:37:49,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:49,817 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-16 11:37:49,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:49,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:49,818 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:50,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-16 11:37:50,027 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:50,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:50,027 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-10-16 11:37:50,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:50,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515266048] [2020-10-16 11:37:50,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:50,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515266048] [2020-10-16 11:37:50,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717288399] [2020-10-16 11:37:50,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:50,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:50,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:50,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:50,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:50,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:50,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:50,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858992616] [2020-10-16 11:37:50,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:50,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:50,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:50,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:50,291 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-16 11:37:50,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:50,474 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-16 11:37:50,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:37:50,475 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:50,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:50,476 INFO L225 Difference]: With dead ends: 185 [2020-10-16 11:37:50,476 INFO L226 Difference]: Without dead ends: 183 [2020-10-16 11:37:50,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:37:50,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-16 11:37:50,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-16 11:37:50,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:37:50,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-16 11:37:50,480 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-16 11:37:50,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:50,481 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-16 11:37:50,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:50,481 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-16 11:37:50,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:50,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:50,482 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:50,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:50,682 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:50,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:50,683 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-10-16 11:37:50,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:50,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375323232] [2020-10-16 11:37:50,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:50,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:50,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375323232] [2020-10-16 11:37:50,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084357943] [2020-10-16 11:37:50,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:50,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:50,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:51,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:51,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:51,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961426161] [2020-10-16 11:37:51,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:51,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:51,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:51,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:51,414 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-16 11:37:51,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:51,636 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-16 11:37:51,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:37:51,637 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:51,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:51,638 INFO L225 Difference]: With dead ends: 191 [2020-10-16 11:37:51,638 INFO L226 Difference]: Without dead ends: 189 [2020-10-16 11:37:51,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:51,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-16 11:37:51,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-16 11:37:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:37:51,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-16 11:37:51,643 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-16 11:37:51,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:51,643 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-16 11:37:51,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:51,643 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-16 11:37:51,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:51,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:51,644 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:51,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:51,854 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:51,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:51,854 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-10-16 11:37:51,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:51,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672224875] [2020-10-16 11:37:51,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:51,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672224875] [2020-10-16 11:37:51,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28159227] [2020-10-16 11:37:51,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:52,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:52,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:52,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:52,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:52,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:52,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:52,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347549473] [2020-10-16 11:37:52,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:52,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:52,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:52,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:52,157 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-16 11:37:52,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:52,386 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-16 11:37:52,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:52,387 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:52,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:52,388 INFO L225 Difference]: With dead ends: 187 [2020-10-16 11:37:52,389 INFO L226 Difference]: Without dead ends: 185 [2020-10-16 11:37:52,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:52,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-16 11:37:52,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-16 11:37:52,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:37:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-16 11:37:52,393 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-16 11:37:52,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:52,393 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-16 11:37:52,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:52,394 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-16 11:37:52,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:52,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:52,394 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:52,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-16 11:37:52,607 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:52,607 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-10-16 11:37:52,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:52,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729862802] [2020-10-16 11:37:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:52,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729862802] [2020-10-16 11:37:52,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041001893] [2020-10-16 11:37:52,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:52,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:52,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:52,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:52,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:52,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:52,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:52,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117294146] [2020-10-16 11:37:52,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:52,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:52,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:52,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:52,839 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-16 11:37:53,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:53,091 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-16 11:37:53,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:37:53,092 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:53,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:53,094 INFO L225 Difference]: With dead ends: 198 [2020-10-16 11:37:53,094 INFO L226 Difference]: Without dead ends: 196 [2020-10-16 11:37:53,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:53,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-16 11:37:53,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-16 11:37:53,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:37:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-16 11:37:53,098 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-16 11:37:53,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:53,098 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-16 11:37:53,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:53,098 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-16 11:37:53,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:53,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:53,099 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:53,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:53,299 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:53,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:53,300 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-10-16 11:37:53,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:53,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910332296] [2020-10-16 11:37:53,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:53,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910332296] [2020-10-16 11:37:53,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833376736] [2020-10-16 11:37:53,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:53,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:53,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:53,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:53,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:53,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:53,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:53,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902709815] [2020-10-16 11:37:53,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:53,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:53,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:53,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:53,577 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-16 11:37:53,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:53,842 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-16 11:37:53,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:37:53,843 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:53,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:53,845 INFO L225 Difference]: With dead ends: 189 [2020-10-16 11:37:53,845 INFO L226 Difference]: Without dead ends: 187 [2020-10-16 11:37:53,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:53,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-16 11:37:53,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-16 11:37:53,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:37:53,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-16 11:37:53,848 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-16 11:37:53,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:53,848 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-16 11:37:53,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:53,848 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-16 11:37:53,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:53,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:53,849 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:54,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-16 11:37:54,050 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:54,050 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-10-16 11:37:54,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:54,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783106202] [2020-10-16 11:37:54,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:54,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783106202] [2020-10-16 11:37:54,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351500389] [2020-10-16 11:37:54,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:54,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:54,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:54,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:54,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:54,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:54,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:54,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385001942] [2020-10-16 11:37:54,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:54,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:54,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:54,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:54,307 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-16 11:37:54,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:54,395 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-16 11:37:54,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:37:54,396 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:54,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:54,397 INFO L225 Difference]: With dead ends: 178 [2020-10-16 11:37:54,397 INFO L226 Difference]: Without dead ends: 176 [2020-10-16 11:37:54,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:37:54,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-16 11:37:54,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-16 11:37:54,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:37:54,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-16 11:37:54,401 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-16 11:37:54,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:54,402 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-16 11:37:54,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:54,402 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-16 11:37:54,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:54,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:54,402 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:54,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:54,603 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:54,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:54,604 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-10-16 11:37:54,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:54,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758641933] [2020-10-16 11:37:54,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:54,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758641933] [2020-10-16 11:37:54,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767061007] [2020-10-16 11:37:54,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:54,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:54,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:54,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:54,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:54,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:54,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:54,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631077064] [2020-10-16 11:37:54,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:54,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:54,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:54,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:54,851 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-16 11:37:55,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:55,040 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-16 11:37:55,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:55,041 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:55,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:55,043 INFO L225 Difference]: With dead ends: 193 [2020-10-16 11:37:55,043 INFO L226 Difference]: Without dead ends: 191 [2020-10-16 11:37:55,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:37:55,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-16 11:37:55,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-16 11:37:55,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:37:55,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-16 11:37:55,047 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-16 11:37:55,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:55,048 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-16 11:37:55,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:55,048 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-16 11:37:55,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:55,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:55,048 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:55,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-16 11:37:55,259 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:55,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:55,259 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-10-16 11:37:55,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:55,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073099695] [2020-10-16 11:37:55,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:55,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073099695] [2020-10-16 11:37:55,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978172045] [2020-10-16 11:37:55,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:55,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:55,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:55,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:55,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:55,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211995815] [2020-10-16 11:37:55,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:55,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:55,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:55,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:55,572 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-16 11:37:55,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:55,825 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-16 11:37:55,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:55,826 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:55,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:55,827 INFO L225 Difference]: With dead ends: 195 [2020-10-16 11:37:55,828 INFO L226 Difference]: Without dead ends: 193 [2020-10-16 11:37:55,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:37:55,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-16 11:37:55,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-16 11:37:55,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:37:55,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-16 11:37:55,830 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-16 11:37:55,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:55,831 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-16 11:37:55,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:55,831 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-16 11:37:55,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:55,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:55,831 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:56,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:56,042 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:56,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:56,042 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-10-16 11:37:56,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:56,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861382302] [2020-10-16 11:37:56,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:56,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:56,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861382302] [2020-10-16 11:37:56,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351545675] [2020-10-16 11:37:56,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:56,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:37:56,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:56,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:56,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:56,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:56,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:56,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750017871] [2020-10-16 11:37:56,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:56,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:56,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:56,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:56,304 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-16 11:37:56,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:56,423 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-16 11:37:56,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:37:56,423 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:56,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:56,425 INFO L225 Difference]: With dead ends: 174 [2020-10-16 11:37:56,425 INFO L226 Difference]: Without dead ends: 172 [2020-10-16 11:37:56,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:37:56,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-16 11:37:56,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-16 11:37:56,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:37:56,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-16 11:37:56,429 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-16 11:37:56,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:56,429 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-16 11:37:56,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:56,429 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-16 11:37:56,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:56,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:56,429 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:56,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-16 11:37:56,631 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:56,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:56,631 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-10-16 11:37:56,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:56,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962070556] [2020-10-16 11:37:56,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:56,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962070556] [2020-10-16 11:37:56,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107085662] [2020-10-16 11:37:56,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:56,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:37:56,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:56,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:56,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:56,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:56,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:56,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688665641] [2020-10-16 11:37:56,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:56,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:56,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:56,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:56,868 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-16 11:37:57,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:57,087 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-16 11:37:57,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:37:57,087 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:57,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:57,089 INFO L225 Difference]: With dead ends: 189 [2020-10-16 11:37:57,089 INFO L226 Difference]: Without dead ends: 187 [2020-10-16 11:37:57,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:37:57,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-16 11:37:57,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-16 11:37:57,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:37:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-16 11:37:57,092 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-16 11:37:57,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:57,093 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-16 11:37:57,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:57,093 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-16 11:37:57,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:57,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:57,093 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:57,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:57,294 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:57,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:57,295 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-10-16 11:37:57,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:57,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484525095] [2020-10-16 11:37:57,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:57,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484525095] [2020-10-16 11:37:57,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120891581] [2020-10-16 11:37:57,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:57,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:37:57,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:57,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:57,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:57,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:57,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:57,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411971667] [2020-10-16 11:37:57,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:57,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:57,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:57,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:57,529 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-16 11:37:57,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:57,674 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-16 11:37:57,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:37:57,674 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:57,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:57,675 INFO L225 Difference]: With dead ends: 175 [2020-10-16 11:37:57,675 INFO L226 Difference]: Without dead ends: 173 [2020-10-16 11:37:57,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:37:57,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-16 11:37:57,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-16 11:37:57,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:37:57,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 11:37:57,679 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 11:37:57,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:57,679 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 11:37:57,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:57,679 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 11:37:57,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:57,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:57,680 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:57,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:57,882 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:57,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:57,882 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-10-16 11:37:57,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:57,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205506276] [2020-10-16 11:37:57,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:57,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205506276] [2020-10-16 11:37:57,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972508677] [2020-10-16 11:37:57,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:57,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:37:57,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:57,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:57,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:58,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:37:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:58,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:58,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:58,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137998833] [2020-10-16 11:37:58,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:58,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:58,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:58,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:58,128 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 11:37:58,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:58,464 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-16 11:37:58,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:37:58,464 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:58,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:58,466 INFO L225 Difference]: With dead ends: 195 [2020-10-16 11:37:58,466 INFO L226 Difference]: Without dead ends: 190 [2020-10-16 11:37:58,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:37:58,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-16 11:37:58,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-16 11:37:58,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:37:58,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-16 11:37:58,470 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-16 11:37:58,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:58,470 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-16 11:37:58,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:58,470 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-16 11:37:58,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:58,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:58,471 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:58,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:58,674 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:58,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:58,675 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-10-16 11:37:58,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:58,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500418891] [2020-10-16 11:37:58,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:58,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:58,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500418891] [2020-10-16 11:37:58,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319897620] [2020-10-16 11:37:58,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:58,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:37:58,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:37:58,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:58,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:58,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:58,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:58,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665526345] [2020-10-16 11:37:58,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:58,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:58,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:58,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:58,923 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-16 11:37:59,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:59,190 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-16 11:37:59,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:37:59,190 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:37:59,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:59,192 INFO L225 Difference]: With dead ends: 187 [2020-10-16 11:37:59,192 INFO L226 Difference]: Without dead ends: 185 [2020-10-16 11:37:59,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:37:59,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-16 11:37:59,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-16 11:37:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:37:59,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 11:37:59,202 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 11:37:59,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:59,202 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 11:37:59,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:37:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 11:37:59,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:37:59,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:59,203 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:59,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:59,404 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:59,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:59,404 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-10-16 11:37:59,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:59,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158002891] [2020-10-16 11:37:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:59,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158002891] [2020-10-16 11:37:59,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992298542] [2020-10-16 11:37:59,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:59,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:37:59,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:59,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:37:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:59,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:59,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:59,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848616680] [2020-10-16 11:37:59,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:37:59,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:59,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:37:59,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:37:59,655 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 11:38:00,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:00,121 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-16 11:38:00,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:38:00,122 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:00,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:00,123 INFO L225 Difference]: With dead ends: 212 [2020-10-16 11:38:00,123 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 11:38:00,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:38:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 11:38:00,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-16 11:38:00,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:38:00,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 11:38:00,127 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 11:38:00,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:00,128 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 11:38:00,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:00,128 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 11:38:00,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:00,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:00,128 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:00,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-16 11:38:00,329 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:00,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:00,330 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-10-16 11:38:00,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:00,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536081633] [2020-10-16 11:38:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:00,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536081633] [2020-10-16 11:38:00,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812444010] [2020-10-16 11:38:00,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:00,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:38:00,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:00,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:00,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:00,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:38:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:00,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:00,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:00,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349186998] [2020-10-16 11:38:00,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:00,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:00,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:00,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:00,577 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 11:38:00,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:00,914 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-16 11:38:00,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:38:00,914 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:00,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:00,916 INFO L225 Difference]: With dead ends: 202 [2020-10-16 11:38:00,916 INFO L226 Difference]: Without dead ends: 197 [2020-10-16 11:38:00,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:38:00,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-16 11:38:00,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-16 11:38:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:38:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-16 11:38:00,920 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-16 11:38:00,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:00,920 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-16 11:38:00,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:00,920 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-16 11:38:00,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:00,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:00,921 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:01,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:01,122 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:01,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:01,122 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-10-16 11:38:01,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:01,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361956614] [2020-10-16 11:38:01,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:01,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:01,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361956614] [2020-10-16 11:38:01,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887373042] [2020-10-16 11:38:01,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:01,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:38:01,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:01,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:01,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:01,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:01,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:01,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:01,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291935654] [2020-10-16 11:38:01,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:01,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:01,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:01,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:01,407 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-16 11:38:01,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:01,702 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-16 11:38:01,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:38:01,703 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:01,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:01,704 INFO L225 Difference]: With dead ends: 198 [2020-10-16 11:38:01,704 INFO L226 Difference]: Without dead ends: 196 [2020-10-16 11:38:01,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:38:01,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-16 11:38:01,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-16 11:38:01,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:38:01,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-16 11:38:01,708 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-16 11:38:01,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:01,709 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-16 11:38:01,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:01,709 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-16 11:38:01,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:01,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:01,710 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:01,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-16 11:38:01,919 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:01,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:01,919 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-10-16 11:38:01,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:01,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667047652] [2020-10-16 11:38:01,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:01,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667047652] [2020-10-16 11:38:01,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529246463] [2020-10-16 11:38:01,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:02,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:38:02,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:02,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:02,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:02,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:02,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:02,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326893617] [2020-10-16 11:38:02,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:02,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:02,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:02,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:02,219 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-16 11:38:02,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:02,638 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-16 11:38:02,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:38:02,639 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:02,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:02,640 INFO L225 Difference]: With dead ends: 209 [2020-10-16 11:38:02,640 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 11:38:02,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:38:02,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 11:38:02,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-16 11:38:02,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:38:02,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-16 11:38:02,644 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-16 11:38:02,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:02,644 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-16 11:38:02,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:02,645 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-16 11:38:02,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:02,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:02,645 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:02,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-16 11:38:02,846 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:02,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:02,846 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-10-16 11:38:02,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:02,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402018852] [2020-10-16 11:38:02,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:02,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402018852] [2020-10-16 11:38:02,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794667712] [2020-10-16 11:38:02,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:02,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:38:02,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:02,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:02,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:03,077 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:38:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:03,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:03,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:03,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095165352] [2020-10-16 11:38:03,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:03,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:03,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:03,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:38:03,115 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-16 11:38:03,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:03,682 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-16 11:38:03,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:38:03,683 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:03,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:03,685 INFO L225 Difference]: With dead ends: 217 [2020-10-16 11:38:03,685 INFO L226 Difference]: Without dead ends: 212 [2020-10-16 11:38:03,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:38:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-16 11:38:03,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-16 11:38:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-16 11:38:03,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-16 11:38:03,690 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-16 11:38:03,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:03,690 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-16 11:38:03,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:03,690 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-16 11:38:03,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:03,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:03,691 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:03,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-16 11:38:03,902 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:03,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:03,902 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-10-16 11:38:03,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:03,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780445997] [2020-10-16 11:38:03,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:03,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780445997] [2020-10-16 11:38:03,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592226792] [2020-10-16 11:38:03,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:04,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:38:04,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:38:04,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:04,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:06,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:38:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:06,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:06,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:38:06,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003851315] [2020-10-16 11:38:06,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:38:06,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:06,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:38:06,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-16 11:38:06,242 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-16 11:38:10,570 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-16 11:38:14,803 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-16 11:38:15,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:15,290 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-16 11:38:15,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:38:15,291 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:38:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:15,292 INFO L225 Difference]: With dead ends: 236 [2020-10-16 11:38:15,292 INFO L226 Difference]: Without dead ends: 228 [2020-10-16 11:38:15,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-16 11:38:15,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-16 11:38:15,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-16 11:38:15,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:38:15,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-16 11:38:15,296 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-16 11:38:15,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:15,296 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-16 11:38:15,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:38:15,296 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-16 11:38:15,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:38:15,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:15,297 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:15,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-16 11:38:15,498 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:15,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:15,498 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-10-16 11:38:15,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:15,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081384002] [2020-10-16 11:38:15,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:15,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081384002] [2020-10-16 11:38:15,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419531916] [2020-10-16 11:38:15,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:15,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:38:15,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:15,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:38:15,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:38:19,855 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2020-10-16 11:38:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:19,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:19,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-16 11:38:19,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397659174] [2020-10-16 11:38:19,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:38:19,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:19,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:38:19,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=169, Unknown=1, NotChecked=0, Total=240 [2020-10-16 11:38:19,859 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 16 states. [2020-10-16 11:38:21,606 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 44 [2020-10-16 11:38:29,834 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 51 [2020-10-16 11:38:33,405 WARN L193 SmtUtils]: Spent 3.50 s on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-16 11:39:13,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:13,699 INFO L93 Difference]: Finished difference Result 230 states and 544 transitions. [2020-10-16 11:39:13,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:39:13,703 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-16 11:39:13,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:13,704 INFO L225 Difference]: With dead ends: 230 [2020-10-16 11:39:13,704 INFO L226 Difference]: Without dead ends: 225 [2020-10-16 11:39:13,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=298, Invalid=687, Unknown=7, NotChecked=0, Total=992 [2020-10-16 11:39:13,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-16 11:39:13,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 140. [2020-10-16 11:39:13,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:39:13,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-16 11:39:13,707 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-16 11:39:13,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:13,707 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-16 11:39:13,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:39:13,707 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-16 11:39:13,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:13,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:13,707 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:13,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:13,908 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:13,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:13,909 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-10-16 11:39:13,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:13,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074937794] [2020-10-16 11:39:13,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:13,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074937794] [2020-10-16 11:39:13,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85031226] [2020-10-16 11:39:13,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:14,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:39:14,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:14,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:14,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:14,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:14,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:14,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108460514] [2020-10-16 11:39:14,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:14,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:14,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:14,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:14,178 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-16 11:39:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:14,468 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-16 11:39:14,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:39:14,469 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:14,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:14,470 INFO L225 Difference]: With dead ends: 197 [2020-10-16 11:39:14,470 INFO L226 Difference]: Without dead ends: 195 [2020-10-16 11:39:14,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:39:14,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-16 11:39:14,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-16 11:39:14,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:39:14,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-16 11:39:14,475 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-16 11:39:14,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:14,475 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-16 11:39:14,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:14,475 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-16 11:39:14,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:14,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:14,476 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:14,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:14,681 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:14,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:14,681 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-10-16 11:39:14,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:14,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814069304] [2020-10-16 11:39:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:14,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814069304] [2020-10-16 11:39:14,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574676706] [2020-10-16 11:39:14,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:14,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:39:14,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:14,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:14,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:14,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:14,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:14,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844668405] [2020-10-16 11:39:14,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:14,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:14,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:14,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:14,928 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-16 11:39:15,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:15,210 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-16 11:39:15,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:39:15,211 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:15,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:15,212 INFO L225 Difference]: With dead ends: 202 [2020-10-16 11:39:15,212 INFO L226 Difference]: Without dead ends: 200 [2020-10-16 11:39:15,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:39:15,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-16 11:39:15,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-16 11:39:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:39:15,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-16 11:39:15,216 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-16 11:39:15,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:15,216 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-16 11:39:15,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:15,216 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-16 11:39:15,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:15,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:15,217 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:15,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-16 11:39:15,420 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:15,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:15,420 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-10-16 11:39:15,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:15,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141801704] [2020-10-16 11:39:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:15,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141801704] [2020-10-16 11:39:15,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227652613] [2020-10-16 11:39:15,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:15,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:39:15,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:15,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:15,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:15,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:15,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:15,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152392922] [2020-10-16 11:39:15,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:15,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:15,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:15,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:15,698 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-16 11:39:16,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:16,000 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-16 11:39:16,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:39:16,001 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:16,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:16,002 INFO L225 Difference]: With dead ends: 197 [2020-10-16 11:39:16,002 INFO L226 Difference]: Without dead ends: 195 [2020-10-16 11:39:16,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:39:16,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-16 11:39:16,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-16 11:39:16,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:39:16,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-16 11:39:16,006 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-16 11:39:16,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:16,006 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-16 11:39:16,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:16,007 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-16 11:39:16,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:16,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:16,007 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:16,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-16 11:39:16,208 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:16,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:16,208 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-10-16 11:39:16,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:16,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125079683] [2020-10-16 11:39:16,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:16,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125079683] [2020-10-16 11:39:16,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489539012] [2020-10-16 11:39:16,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:16,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:39:16,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:16,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:16,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:16,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:16,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:16,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013872333] [2020-10-16 11:39:16,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:16,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:16,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:16,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:16,471 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-16 11:39:16,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:16,934 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-16 11:39:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:39:16,935 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:16,936 INFO L225 Difference]: With dead ends: 214 [2020-10-16 11:39:16,936 INFO L226 Difference]: Without dead ends: 212 [2020-10-16 11:39:16,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:39:16,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-16 11:39:16,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-16 11:39:16,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 11:39:16,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-16 11:39:16,941 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-16 11:39:16,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:16,941 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-16 11:39:16,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:16,941 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-16 11:39:16,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:16,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:16,942 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:17,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-16 11:39:17,152 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:17,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:17,152 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-10-16 11:39:17,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:17,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322068880] [2020-10-16 11:39:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:17,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322068880] [2020-10-16 11:39:17,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345236819] [2020-10-16 11:39:17,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:17,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:39:17,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:17,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:17,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:17,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:17,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:17,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464507288] [2020-10-16 11:39:17,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:17,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:17,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:17,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:17,417 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-16 11:39:17,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:17,859 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-16 11:39:17,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:39:17,859 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:17,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:17,860 INFO L225 Difference]: With dead ends: 217 [2020-10-16 11:39:17,861 INFO L226 Difference]: Without dead ends: 215 [2020-10-16 11:39:17,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:39:17,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-16 11:39:17,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-16 11:39:17,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:39:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-16 11:39:17,863 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-16 11:39:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:17,863 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-16 11:39:17,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:17,864 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-16 11:39:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:17,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:17,864 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:18,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:18,065 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:18,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:18,066 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-10-16 11:39:18,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:18,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36722543] [2020-10-16 11:39:18,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:18,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36722543] [2020-10-16 11:39:18,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655618762] [2020-10-16 11:39:18,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:18,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:18,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:18,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:18,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:18,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577651225] [2020-10-16 11:39:18,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:18,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:18,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:18,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:18,326 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-16 11:39:18,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:18,755 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-16 11:39:18,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:39:18,755 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:18,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:18,756 INFO L225 Difference]: With dead ends: 211 [2020-10-16 11:39:18,756 INFO L226 Difference]: Without dead ends: 209 [2020-10-16 11:39:18,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:39:18,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-16 11:39:18,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-16 11:39:18,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 11:39:18,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 11:39:18,761 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 11:39:18,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:18,761 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 11:39:18,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:18,761 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 11:39:18,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:18,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:18,761 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:18,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:18,962 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:18,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:18,963 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-10-16 11:39:18,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:18,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771228295] [2020-10-16 11:39:18,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:19,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771228295] [2020-10-16 11:39:19,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348265997] [2020-10-16 11:39:19,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:19,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:39:19,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:19,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:19,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:19,194 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:39:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:19,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:19,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:19,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710909017] [2020-10-16 11:39:19,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:19,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:19,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:19,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:19,215 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 11:39:19,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:19,721 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-16 11:39:19,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:39:19,722 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:19,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:19,723 INFO L225 Difference]: With dead ends: 211 [2020-10-16 11:39:19,723 INFO L226 Difference]: Without dead ends: 206 [2020-10-16 11:39:19,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:39:19,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-16 11:39:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-16 11:39:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 11:39:19,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 11:39:19,726 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 11:39:19,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:19,727 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 11:39:19,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:19,727 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 11:39:19,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:19,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:19,727 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:19,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-16 11:39:19,928 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:19,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:19,929 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-10-16 11:39:19,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:19,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200148752] [2020-10-16 11:39:19,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:20,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200148752] [2020-10-16 11:39:20,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708964959] [2020-10-16 11:39:20,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:20,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:39:20,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:20,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:20,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:20,155 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:39:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:20,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:20,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:20,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463253732] [2020-10-16 11:39:20,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:20,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:20,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:20,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:20,195 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 11:39:20,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:20,832 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-16 11:39:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:39:20,832 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:20,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:20,833 INFO L225 Difference]: With dead ends: 227 [2020-10-16 11:39:20,834 INFO L226 Difference]: Without dead ends: 222 [2020-10-16 11:39:20,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:39:20,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-16 11:39:20,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-16 11:39:20,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-16 11:39:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-16 11:39:20,837 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-16 11:39:20,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:20,837 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-16 11:39:20,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:20,838 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-16 11:39:20,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:20,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:20,838 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:21,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-16 11:39:21,039 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:21,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:21,039 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-10-16 11:39:21,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:21,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175721758] [2020-10-16 11:39:21,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:21,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175721758] [2020-10-16 11:39:21,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871068077] [2020-10-16 11:39:21,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:21,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:39:21,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:21,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:21,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:21,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:21,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:21,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687258835] [2020-10-16 11:39:21,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:21,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:21,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:21,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:21,284 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-16 11:39:21,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:21,797 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-16 11:39:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:39:21,797 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:21,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:21,798 INFO L225 Difference]: With dead ends: 221 [2020-10-16 11:39:21,798 INFO L226 Difference]: Without dead ends: 219 [2020-10-16 11:39:21,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:39:21,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-16 11:39:21,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-16 11:39:21,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-16 11:39:21,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-16 11:39:21,802 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-16 11:39:21,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:21,802 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-16 11:39:21,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:21,802 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-16 11:39:21,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:21,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:21,803 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:22,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:22,007 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:22,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:22,007 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-10-16 11:39:22,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:22,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749888418] [2020-10-16 11:39:22,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:22,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749888418] [2020-10-16 11:39:22,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779135775] [2020-10-16 11:39:22,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:22,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:39:22,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:22,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:22,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:22,234 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:39:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:22,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:22,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:22,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225711881] [2020-10-16 11:39:22,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:22,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:22,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:22,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:22,254 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-16 11:39:22,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:22,899 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-16 11:39:22,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:39:22,900 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:22,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:22,900 INFO L225 Difference]: With dead ends: 240 [2020-10-16 11:39:22,900 INFO L226 Difference]: Without dead ends: 232 [2020-10-16 11:39:22,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:39:22,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-16 11:39:22,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-16 11:39:22,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-16 11:39:22,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-16 11:39:22,904 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-16 11:39:22,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:22,904 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-16 11:39:22,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:22,904 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-16 11:39:22,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:22,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:22,905 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:23,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-16 11:39:23,106 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:23,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:23,107 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-10-16 11:39:23,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:23,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795818006] [2020-10-16 11:39:23,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:23,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795818006] [2020-10-16 11:39:23,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161697615] [2020-10-16 11:39:23,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:23,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:39:23,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:23,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:23,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:23,329 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:39:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:23,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:23,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:23,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769242903] [2020-10-16 11:39:23,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:23,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:23,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:23,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:23,343 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-16 11:39:24,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:24,014 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-16 11:39:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:39:24,015 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:24,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:24,016 INFO L225 Difference]: With dead ends: 238 [2020-10-16 11:39:24,016 INFO L226 Difference]: Without dead ends: 230 [2020-10-16 11:39:24,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:39:24,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-16 11:39:24,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-16 11:39:24,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:39:24,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-16 11:39:24,020 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-16 11:39:24,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:24,020 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-16 11:39:24,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:24,020 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-16 11:39:24,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:24,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:24,021 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:24,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:24,222 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:24,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:24,222 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-10-16 11:39:24,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:24,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064382668] [2020-10-16 11:39:24,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:24,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064382668] [2020-10-16 11:39:24,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559238356] [2020-10-16 11:39:24,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:24,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:24,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:24,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:24,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:24,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131794647] [2020-10-16 11:39:24,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:24,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:24,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:24,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:24,487 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-16 11:39:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:24,771 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-16 11:39:24,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:39:24,772 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:24,772 INFO L225 Difference]: With dead ends: 195 [2020-10-16 11:39:24,772 INFO L226 Difference]: Without dead ends: 193 [2020-10-16 11:39:24,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:39:24,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-16 11:39:24,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-16 11:39:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:39:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-16 11:39:24,775 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-16 11:39:24,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:24,775 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-16 11:39:24,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:24,775 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-16 11:39:24,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:24,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:24,776 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:24,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-16 11:39:24,977 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:24,977 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-10-16 11:39:24,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:24,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960138028] [2020-10-16 11:39:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:25,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960138028] [2020-10-16 11:39:25,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963893280] [2020-10-16 11:39:25,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:25,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:39:25,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:25,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:25,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:25,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:25,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:39:25,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145828559] [2020-10-16 11:39:25,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:39:25,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:25,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:39:25,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:39:25,257 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-16 11:39:25,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:25,785 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-16 11:39:25,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:39:25,786 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:39:25,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:25,787 INFO L225 Difference]: With dead ends: 206 [2020-10-16 11:39:25,787 INFO L226 Difference]: Without dead ends: 204 [2020-10-16 11:39:25,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:39:25,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-16 11:39:25,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-16 11:39:25,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-16 11:39:25,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-16 11:39:25,791 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-16 11:39:25,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:25,791 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-16 11:39:25,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:39:25,792 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-16 11:39:25,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:39:25,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:25,792 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:26,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:26,002 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:26,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:26,002 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-10-16 11:39:26,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:26,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468373206] [2020-10-16 11:39:26,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:26,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468373206] [2020-10-16 11:39:26,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749301355] [2020-10-16 11:39:26,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:39:26,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:39:26,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:39:26,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:39:26,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:39:26,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:39:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:28,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:39:28,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-16 11:39:28,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890328008] [2020-10-16 11:39:28,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:39:28,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:28,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:39:28,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-16 11:39:28,362 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-10-16 11:39:30,824 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-16 11:39:53,453 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-16 11:40:21,666 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-16 11:40:40,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:40,301 INFO L93 Difference]: Finished difference Result 239 states and 570 transitions. [2020-10-16 11:40:40,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:40:40,334 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-16 11:40:40,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:40,335 INFO L225 Difference]: With dead ends: 239 [2020-10-16 11:40:40,335 INFO L226 Difference]: Without dead ends: 234 [2020-10-16 11:40:40,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-10-16 11:40:40,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-16 11:40:40,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 139. [2020-10-16 11:40:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:40:40,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-16 11:40:40,339 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-16 11:40:40,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:40,340 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-16 11:40:40,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:40:40,340 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-16 11:40:40,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:40,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:40,341 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:40,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-16 11:40:40,551 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:40,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:40,551 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-10-16 11:40:40,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:40,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429356835] [2020-10-16 11:40:40,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:40,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429356835] [2020-10-16 11:40:40,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660135088] [2020-10-16 11:40:40,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:40,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:40,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:40,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:40,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:40,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:40,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:40,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:40,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547850186] [2020-10-16 11:40:40,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:40,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:40,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:40,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:40,816 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-16 11:40:41,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:41,044 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-16 11:40:41,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:40:41,045 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:41,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:41,045 INFO L225 Difference]: With dead ends: 194 [2020-10-16 11:40:41,045 INFO L226 Difference]: Without dead ends: 192 [2020-10-16 11:40:41,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:40:41,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-16 11:40:41,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-16 11:40:41,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:40:41,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-16 11:40:41,049 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-16 11:40:41,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:41,049 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-16 11:40:41,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:41,049 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-16 11:40:41,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:41,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:41,050 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:41,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:41,250 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:41,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:41,251 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-10-16 11:40:41,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:41,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698103830] [2020-10-16 11:40:41,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:41,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698103830] [2020-10-16 11:40:41,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386441218] [2020-10-16 11:40:41,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:41,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:40:41,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:41,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:41,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:41,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:41,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:41,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634833103] [2020-10-16 11:40:41,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:41,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:41,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:41,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:41,523 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-16 11:40:41,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:41,847 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-16 11:40:41,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:40:41,847 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:41,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:41,848 INFO L225 Difference]: With dead ends: 205 [2020-10-16 11:40:41,848 INFO L226 Difference]: Without dead ends: 203 [2020-10-16 11:40:41,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:40:41,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-16 11:40:41,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-16 11:40:41,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:40:41,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-16 11:40:41,852 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-16 11:40:41,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:41,852 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-16 11:40:41,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:41,852 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-16 11:40:41,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:41,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:41,853 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:42,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:42,055 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:42,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:42,055 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-10-16 11:40:42,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:42,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619994275] [2020-10-16 11:40:42,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:42,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619994275] [2020-10-16 11:40:42,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264222375] [2020-10-16 11:40:42,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:42,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:40:42,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:42,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:42,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:42,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:42,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:42,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454166396] [2020-10-16 11:40:42,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:42,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:42,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:42,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:42,316 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-16 11:40:42,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:42,600 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-16 11:40:42,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:40:42,601 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:42,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:42,602 INFO L225 Difference]: With dead ends: 201 [2020-10-16 11:40:42,602 INFO L226 Difference]: Without dead ends: 199 [2020-10-16 11:40:42,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:40:42,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-16 11:40:42,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-16 11:40:42,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 11:40:42,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-16 11:40:42,606 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-16 11:40:42,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:42,606 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-16 11:40:42,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:42,606 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-16 11:40:42,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:42,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:42,607 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:42,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:42,815 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:42,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:42,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-10-16 11:40:42,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:42,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147148610] [2020-10-16 11:40:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:42,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147148610] [2020-10-16 11:40:42,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314676794] [2020-10-16 11:40:42,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:42,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:42,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:43,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:43,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:43,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38675277] [2020-10-16 11:40:43,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:43,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:43,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:43,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:43,197 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-16 11:40:43,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:43,560 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-16 11:40:43,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:40:43,561 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:43,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:43,562 INFO L225 Difference]: With dead ends: 194 [2020-10-16 11:40:43,562 INFO L226 Difference]: Without dead ends: 192 [2020-10-16 11:40:43,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:40:43,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-16 11:40:43,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-16 11:40:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:40:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-16 11:40:43,568 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-16 11:40:43,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:43,568 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-16 11:40:43,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:43,568 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-16 11:40:43,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:43,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:43,569 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:43,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-16 11:40:43,780 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:43,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:43,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-10-16 11:40:43,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:43,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935118657] [2020-10-16 11:40:43,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:43,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935118657] [2020-10-16 11:40:43,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724136028] [2020-10-16 11:40:43,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:43,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:40:43,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:43,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:43,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:44,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:44,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:44,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119501336] [2020-10-16 11:40:44,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:44,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:44,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:44,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:44,110 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-16 11:40:44,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:44,484 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-16 11:40:44,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:40:44,485 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:44,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:44,486 INFO L225 Difference]: With dead ends: 209 [2020-10-16 11:40:44,486 INFO L226 Difference]: Without dead ends: 207 [2020-10-16 11:40:44,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:40:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-16 11:40:44,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-16 11:40:44,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:40:44,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-16 11:40:44,489 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-16 11:40:44,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:44,490 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-16 11:40:44,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:44,490 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-16 11:40:44,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:44,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:44,490 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:44,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:44,700 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:44,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:44,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-10-16 11:40:44,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:44,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731932591] [2020-10-16 11:40:44,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:44,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731932591] [2020-10-16 11:40:44,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952340684] [2020-10-16 11:40:44,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:44,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:40:44,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:44,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:44,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:44,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:44,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:44,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490729420] [2020-10-16 11:40:44,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:45,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:45,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:45,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:45,000 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-16 11:40:45,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:45,406 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-16 11:40:45,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:40:45,407 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:45,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:45,408 INFO L225 Difference]: With dead ends: 202 [2020-10-16 11:40:45,408 INFO L226 Difference]: Without dead ends: 200 [2020-10-16 11:40:45,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:40:45,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-16 11:40:45,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-16 11:40:45,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:40:45,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-16 11:40:45,413 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-16 11:40:45,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:45,413 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-16 11:40:45,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:45,413 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-16 11:40:45,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:45,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:45,414 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:45,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-16 11:40:45,623 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:45,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:45,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-10-16 11:40:45,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:45,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303410345] [2020-10-16 11:40:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:45,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303410345] [2020-10-16 11:40:45,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235111476] [2020-10-16 11:40:45,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:45,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:45,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:45,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:45,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:45,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:45,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:45,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387448736] [2020-10-16 11:40:45,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:45,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:45,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:45,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:45,882 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-16 11:40:46,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:46,208 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-16 11:40:46,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:40:46,209 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:46,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:46,209 INFO L225 Difference]: With dead ends: 201 [2020-10-16 11:40:46,209 INFO L226 Difference]: Without dead ends: 199 [2020-10-16 11:40:46,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:40:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-16 11:40:46,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-16 11:40:46,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-16 11:40:46,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-16 11:40:46,214 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-16 11:40:46,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:46,214 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-16 11:40:46,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:46,215 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-16 11:40:46,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:46,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:46,215 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:46,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-16 11:40:46,423 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:46,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:46,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-10-16 11:40:46,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:46,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183918063] [2020-10-16 11:40:46,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:46,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183918063] [2020-10-16 11:40:46,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662766244] [2020-10-16 11:40:46,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:46,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:40:46,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:46,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:46,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:46,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:46,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:46,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184615759] [2020-10-16 11:40:46,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:46,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:46,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:46,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:46,695 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-16 11:40:47,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:47,144 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-16 11:40:47,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:40:47,144 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:47,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:47,145 INFO L225 Difference]: With dead ends: 215 [2020-10-16 11:40:47,145 INFO L226 Difference]: Without dead ends: 213 [2020-10-16 11:40:47,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:40:47,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-16 11:40:47,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-16 11:40:47,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:40:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-16 11:40:47,149 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-16 11:40:47,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:47,149 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-16 11:40:47,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:47,150 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-16 11:40:47,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:47,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:47,150 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:47,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:47,354 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:47,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:47,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-10-16 11:40:47,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:47,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389517672] [2020-10-16 11:40:47,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:47,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389517672] [2020-10-16 11:40:47,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797794031] [2020-10-16 11:40:47,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:47,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:40:47,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:47,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:47,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:47,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:47,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:47,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563977465] [2020-10-16 11:40:47,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:47,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:47,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:47,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:47,611 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-16 11:40:48,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:48,003 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-16 11:40:48,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:40:48,003 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:48,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:48,004 INFO L225 Difference]: With dead ends: 196 [2020-10-16 11:40:48,005 INFO L226 Difference]: Without dead ends: 194 [2020-10-16 11:40:48,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:40:48,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-16 11:40:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-16 11:40:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 11:40:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 11:40:48,009 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 11:40:48,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:48,010 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 11:40:48,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 11:40:48,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:48,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:48,010 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:48,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:48,213 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:48,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:48,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-10-16 11:40:48,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:48,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700690630] [2020-10-16 11:40:48,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:48,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700690630] [2020-10-16 11:40:48,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596851107] [2020-10-16 11:40:48,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:48,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:48,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:48,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:40:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:48,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:48,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:48,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703557033] [2020-10-16 11:40:48,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:48,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:48,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:48,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:48,452 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 11:40:48,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:48,761 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-16 11:40:48,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:40:48,762 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:48,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:48,763 INFO L225 Difference]: With dead ends: 191 [2020-10-16 11:40:48,763 INFO L226 Difference]: Without dead ends: 186 [2020-10-16 11:40:48,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:40:48,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-16 11:40:48,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-16 11:40:48,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 11:40:48,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 11:40:48,768 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 11:40:48,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:48,768 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 11:40:48,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:48,768 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 11:40:48,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:48,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:48,769 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:48,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-16 11:40:48,972 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:48,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:48,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-10-16 11:40:48,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:48,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393450569] [2020-10-16 11:40:48,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:49,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393450569] [2020-10-16 11:40:49,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662862981] [2020-10-16 11:40:49,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:49,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:40:49,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:49,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:49,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:49,217 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:40:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:49,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:49,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:49,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882765721] [2020-10-16 11:40:49,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:49,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:49,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:49,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:49,257 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 11:40:49,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:49,833 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-16 11:40:49,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:40:49,833 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:49,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:49,834 INFO L225 Difference]: With dead ends: 232 [2020-10-16 11:40:49,834 INFO L226 Difference]: Without dead ends: 227 [2020-10-16 11:40:49,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:40:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-16 11:40:49,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-16 11:40:49,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-16 11:40:49,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-16 11:40:49,838 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-16 11:40:49,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:49,838 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-16 11:40:49,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:49,838 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-16 11:40:49,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:49,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:49,839 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:50,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:50,039 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:50,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:50,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-10-16 11:40:50,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:50,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400234169] [2020-10-16 11:40:50,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:50,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400234169] [2020-10-16 11:40:50,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459410221] [2020-10-16 11:40:50,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:50,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:40:50,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:50,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:50,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:50,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:50,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:50,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905269892] [2020-10-16 11:40:50,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:50,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:50,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:50,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:50,321 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-16 11:40:50,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:50,880 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-10-16 11:40:50,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:40:50,881 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:50,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:50,881 INFO L225 Difference]: With dead ends: 222 [2020-10-16 11:40:50,881 INFO L226 Difference]: Without dead ends: 220 [2020-10-16 11:40:50,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:40:50,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-16 11:40:50,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-10-16 11:40:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-16 11:40:50,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-16 11:40:50,884 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-16 11:40:50,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:50,885 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-16 11:40:50,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:50,885 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-16 11:40:50,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:50,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:50,885 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:51,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:51,086 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:51,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-10-16 11:40:51,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:51,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119475645] [2020-10-16 11:40:51,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:51,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119475645] [2020-10-16 11:40:51,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979691454] [2020-10-16 11:40:51,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:51,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:51,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:51,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:51,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:51,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:40:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:51,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:51,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:51,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46582823] [2020-10-16 11:40:51,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:51,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:51,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:51,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:51,367 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-16 11:40:52,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:52,151 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-16 11:40:52,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:40:52,152 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:52,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:52,154 INFO L225 Difference]: With dead ends: 254 [2020-10-16 11:40:52,154 INFO L226 Difference]: Without dead ends: 246 [2020-10-16 11:40:52,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:40:52,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-16 11:40:52,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-16 11:40:52,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-16 11:40:52,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-16 11:40:52,158 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-16 11:40:52,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:52,158 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-16 11:40:52,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:52,159 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-16 11:40:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:52,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:52,159 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:52,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:52,370 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:52,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:52,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-10-16 11:40:52,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:52,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376138694] [2020-10-16 11:40:52,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:52,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376138694] [2020-10-16 11:40:52,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326876260] [2020-10-16 11:40:52,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:52,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:40:52,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:52,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:52,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:52,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:40:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:52,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:52,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:52,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128498907] [2020-10-16 11:40:52,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:52,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:52,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:52,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:52,653 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-16 11:40:53,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:53,472 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-16 11:40:53,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:40:53,473 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:53,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:53,474 INFO L225 Difference]: With dead ends: 246 [2020-10-16 11:40:53,474 INFO L226 Difference]: Without dead ends: 238 [2020-10-16 11:40:53,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:40:53,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-16 11:40:53,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-16 11:40:53,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:40:53,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-16 11:40:53,479 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-16 11:40:53,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:53,479 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-16 11:40:53,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:53,479 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-16 11:40:53,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:53,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:53,480 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:53,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-16 11:40:53,689 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:53,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:53,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-10-16 11:40:53,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:53,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475037425] [2020-10-16 11:40:53,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:53,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:53,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475037425] [2020-10-16 11:40:53,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059701300] [2020-10-16 11:40:53,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:53,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:40:53,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:53,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:53,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:53,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:53,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:53,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634865135] [2020-10-16 11:40:53,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:53,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:53,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:53,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:53,967 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-16 11:40:54,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:54,372 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-16 11:40:54,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:40:54,373 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:54,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:54,374 INFO L225 Difference]: With dead ends: 208 [2020-10-16 11:40:54,374 INFO L226 Difference]: Without dead ends: 206 [2020-10-16 11:40:54,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:40:54,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-16 11:40:54,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-16 11:40:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-16 11:40:54,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-16 11:40:54,377 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-16 11:40:54,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:54,377 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-16 11:40:54,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:54,378 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-16 11:40:54,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:54,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:54,378 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:54,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-16 11:40:54,579 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:54,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:54,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-10-16 11:40:54,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:54,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057630691] [2020-10-16 11:40:54,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:54,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057630691] [2020-10-16 11:40:54,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562525289] [2020-10-16 11:40:54,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:54,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:54,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:54,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:54,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:54,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954697117] [2020-10-16 11:40:54,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:54,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:54,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:54,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:54,847 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-16 11:40:55,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:55,396 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-16 11:40:55,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:40:55,397 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:55,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:55,398 INFO L225 Difference]: With dead ends: 215 [2020-10-16 11:40:55,398 INFO L226 Difference]: Without dead ends: 213 [2020-10-16 11:40:55,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:40:55,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-16 11:40:55,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-16 11:40:55,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 11:40:55,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-16 11:40:55,402 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-16 11:40:55,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:55,402 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-16 11:40:55,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:55,402 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-16 11:40:55,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:55,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:55,403 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:55,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-16 11:40:55,612 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:55,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:55,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-10-16 11:40:55,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:55,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573690507] [2020-10-16 11:40:55,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:55,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573690507] [2020-10-16 11:40:55,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882941534] [2020-10-16 11:40:55,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:55,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:40:55,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:55,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:55,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:55,845 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:40:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:55,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:55,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:55,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089424380] [2020-10-16 11:40:55,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:55,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:55,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:55,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:55,858 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-16 11:40:56,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:56,452 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-16 11:40:56,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:40:56,453 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:56,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:56,454 INFO L225 Difference]: With dead ends: 236 [2020-10-16 11:40:56,454 INFO L226 Difference]: Without dead ends: 228 [2020-10-16 11:40:56,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:40:56,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-16 11:40:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-16 11:40:56,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-16 11:40:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-16 11:40:56,457 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-16 11:40:56,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:56,457 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-16 11:40:56,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:56,458 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-16 11:40:56,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:56,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:56,458 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:56,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-16 11:40:56,659 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:56,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:56,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-10-16 11:40:56,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:56,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373258239] [2020-10-16 11:40:56,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:56,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373258239] [2020-10-16 11:40:56,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379900492] [2020-10-16 11:40:56,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:56,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:40:56,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:56,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:56,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:56,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:40:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:56,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:56,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:56,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419632949] [2020-10-16 11:40:56,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:56,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:56,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:56,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:56,921 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-16 11:40:57,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:57,583 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-16 11:40:57,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:40:57,584 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:57,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:57,584 INFO L225 Difference]: With dead ends: 241 [2020-10-16 11:40:57,585 INFO L226 Difference]: Without dead ends: 233 [2020-10-16 11:40:57,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:40:57,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-16 11:40:57,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-16 11:40:57,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-16 11:40:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-16 11:40:57,588 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-16 11:40:57,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:57,588 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-16 11:40:57,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:57,588 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-16 11:40:57,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:57,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:57,589 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:57,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-16 11:40:57,799 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:57,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:57,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-10-16 11:40:57,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:57,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998167216] [2020-10-16 11:40:57,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:57,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:57,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998167216] [2020-10-16 11:40:57,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522373122] [2020-10-16 11:40:57,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:57,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:40:57,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:57,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:40:57,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:58,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:40:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:58,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:58,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:40:58,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708912845] [2020-10-16 11:40:58,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:40:58,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:58,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:40:58,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:40:58,053 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-16 11:40:58,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:58,689 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-16 11:40:58,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:40:58,689 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-16 11:40:58,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:58,690 INFO L225 Difference]: With dead ends: 232 [2020-10-16 11:40:58,690 INFO L226 Difference]: Without dead ends: 224 [2020-10-16 11:40:58,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:40:58,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-16 11:40:58,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-16 11:40:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-16 11:40:58,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-16 11:40:58,694 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-16 11:40:58,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:58,695 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-16 11:40:58,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:40:58,695 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-16 11:40:58,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:58,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:58,695 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:58,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:58,905 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:58,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:58,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-10-16 11:40:58,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:58,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426823277] [2020-10-16 11:40:58,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:59,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426823277] [2020-10-16 11:40:59,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138633391] [2020-10-16 11:40:59,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:59,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:40:59,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:40:59,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:40:59,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:59,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:40:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:59,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:59,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-16 11:40:59,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560038099] [2020-10-16 11:40:59,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:40:59,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:59,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:40:59,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:40:59,291 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-10-16 11:40:59,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:59,578 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-10-16 11:40:59,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:40:59,579 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-10-16 11:40:59,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:59,580 INFO L225 Difference]: With dead ends: 185 [2020-10-16 11:40:59,580 INFO L226 Difference]: Without dead ends: 180 [2020-10-16 11:40:59,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:40:59,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-16 11:40:59,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-10-16 11:40:59,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-16 11:40:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-16 11:40:59,583 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-16 11:40:59,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:59,584 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-16 11:40:59,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:40:59,584 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-16 11:40:59,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:40:59,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:59,584 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:59,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-16 11:40:59,792 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:59,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:59,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-10-16 11:40:59,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:59,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590157815] [2020-10-16 11:40:59,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:40:59,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590157815] [2020-10-16 11:40:59,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231198689] [2020-10-16 11:40:59,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:59,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:40:59,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:00,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:00,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:00,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:00,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:00,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625381207] [2020-10-16 11:41:00,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:00,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:00,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:00,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:00,198 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-10-16 11:41:00,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:00,254 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-10-16 11:41:00,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:41:00,255 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:41:00,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:00,255 INFO L225 Difference]: With dead ends: 180 [2020-10-16 11:41:00,255 INFO L226 Difference]: Without dead ends: 177 [2020-10-16 11:41:00,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:00,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-16 11:41:00,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-10-16 11:41:00,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-16 11:41:00,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-16 11:41:00,258 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-16 11:41:00,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:00,258 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-16 11:41:00,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:00,258 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-16 11:41:00,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:00,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:00,258 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:00,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-16 11:41:00,459 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:00,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:00,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1413108102, now seen corresponding path program 22 times [2020-10-16 11:41:00,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:00,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193574018] [2020-10-16 11:41:00,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:00,615 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:00,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193574018] [2020-10-16 11:41:00,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801389163] [2020-10-16 11:41:00,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:00,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:00,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:00,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:00,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:00,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:00,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:00,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532709669] [2020-10-16 11:41:00,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:00,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:00,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:00,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:00,839 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-16 11:41:00,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:00,921 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-10-16 11:41:00,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:00,922 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:41:00,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:00,923 INFO L225 Difference]: With dead ends: 197 [2020-10-16 11:41:00,923 INFO L226 Difference]: Without dead ends: 194 [2020-10-16 11:41:00,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:41:00,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-16 11:41:00,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-10-16 11:41:00,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-16 11:41:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-16 11:41:00,925 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-16 11:41:00,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:00,926 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-16 11:41:00,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:00,926 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-16 11:41:00,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:00,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:00,926 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:01,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:01,136 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:01,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:01,136 INFO L82 PathProgramCache]: Analyzing trace with hash 551260342, now seen corresponding path program 23 times [2020-10-16 11:41:01,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:01,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777661748] [2020-10-16 11:41:01,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:01,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777661748] [2020-10-16 11:41:01,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531603318] [2020-10-16 11:41:01,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:01,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 11:41:01,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:01,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:01,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:01,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:01,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:01,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656345895] [2020-10-16 11:41:01,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:01,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:01,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:01,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:01,495 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-16 11:41:01,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:01,596 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-10-16 11:41:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:01,596 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:41:01,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:01,597 INFO L225 Difference]: With dead ends: 196 [2020-10-16 11:41:01,597 INFO L226 Difference]: Without dead ends: 193 [2020-10-16 11:41:01,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:41:01,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-16 11:41:01,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-10-16 11:41:01,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-16 11:41:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-10-16 11:41:01,600 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-10-16 11:41:01,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:01,600 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-10-16 11:41:01,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:01,601 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-10-16 11:41:01,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:01,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:01,601 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:01,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:01,802 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:01,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:01,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1216195462, now seen corresponding path program 24 times [2020-10-16 11:41:01,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:01,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381685037] [2020-10-16 11:41:01,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:01,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381685037] [2020-10-16 11:41:01,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978185040] [2020-10-16 11:41:01,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:01,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:41:01,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:01,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:01,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:02,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:02,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:02,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854553957] [2020-10-16 11:41:02,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:02,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:02,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:02,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:02,156 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-10-16 11:41:02,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:02,296 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-16 11:41:02,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:02,296 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:41:02,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:02,297 INFO L225 Difference]: With dead ends: 195 [2020-10-16 11:41:02,297 INFO L226 Difference]: Without dead ends: 192 [2020-10-16 11:41:02,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:41:02,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-16 11:41:02,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-10-16 11:41:02,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-16 11:41:02,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-10-16 11:41:02,300 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-10-16 11:41:02,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:02,301 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-10-16 11:41:02,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:02,301 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-10-16 11:41:02,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:02,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:02,301 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:02,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:02,502 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:02,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:02,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1237644982, now seen corresponding path program 25 times [2020-10-16 11:41:02,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:02,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848391432] [2020-10-16 11:41:02,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:02,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848391432] [2020-10-16 11:41:02,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453058451] [2020-10-16 11:41:02,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:02,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:02,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:02,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:02,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:02,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787517918] [2020-10-16 11:41:02,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:02,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:02,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:02,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:02,848 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-10-16 11:41:03,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:03,048 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-10-16 11:41:03,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:03,049 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:41:03,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:03,050 INFO L225 Difference]: With dead ends: 194 [2020-10-16 11:41:03,050 INFO L226 Difference]: Without dead ends: 191 [2020-10-16 11:41:03,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:41:03,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-16 11:41:03,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-10-16 11:41:03,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-16 11:41:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-10-16 11:41:03,055 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-10-16 11:41:03,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:03,056 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-10-16 11:41:03,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:03,056 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-10-16 11:41:03,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:03,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:03,057 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:03,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:03,264 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:03,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:03,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1238336902, now seen corresponding path program 26 times [2020-10-16 11:41:03,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:03,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094814628] [2020-10-16 11:41:03,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:03,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094814628] [2020-10-16 11:41:03,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178538890] [2020-10-16 11:41:03,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:03,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:03,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:03,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:03,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:03,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:03,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:03,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114680928] [2020-10-16 11:41:03,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:03,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:03,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:03,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:03,596 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-10-16 11:41:03,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:03,795 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-10-16 11:41:03,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:03,796 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:41:03,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:03,797 INFO L225 Difference]: With dead ends: 193 [2020-10-16 11:41:03,797 INFO L226 Difference]: Without dead ends: 190 [2020-10-16 11:41:03,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:41:03,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-16 11:41:03,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-10-16 11:41:03,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-16 11:41:03,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-10-16 11:41:03,800 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-10-16 11:41:03,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:03,800 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-10-16 11:41:03,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:03,800 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-10-16 11:41:03,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:03,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:03,801 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:04,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-16 11:41:04,002 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:04,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:04,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1238359222, now seen corresponding path program 27 times [2020-10-16 11:41:04,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:04,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063279787] [2020-10-16 11:41:04,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:04,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063279787] [2020-10-16 11:41:04,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005487743] [2020-10-16 11:41:04,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:04,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:41:04,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:04,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:04,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:04,319 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:04,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:04,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:04,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546041097] [2020-10-16 11:41:04,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:04,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:04,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:04,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:04,337 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-10-16 11:41:04,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:04,593 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-16 11:41:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:41:04,594 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-16 11:41:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:04,594 INFO L225 Difference]: With dead ends: 202 [2020-10-16 11:41:04,595 INFO L226 Difference]: Without dead ends: 196 [2020-10-16 11:41:04,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:04,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-16 11:41:04,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-10-16 11:41:04,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-16 11:41:04,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-10-16 11:41:04,600 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-10-16 11:41:04,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:04,600 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-10-16 11:41:04,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:04,601 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-10-16 11:41:04,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:04,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:04,601 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:04,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-16 11:41:04,802 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:04,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:04,802 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-10-16 11:41:04,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:04,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662520141] [2020-10-16 11:41:04,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:04,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662520141] [2020-10-16 11:41:04,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486057790] [2020-10-16 11:41:04,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:04,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:04,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:04,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:04,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:05,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:05,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:05,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048679005] [2020-10-16 11:41:05,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:05,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:05,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:05,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:05,183 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-10-16 11:41:05,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:05,258 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-10-16 11:41:05,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:41:05,259 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:05,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:05,260 INFO L225 Difference]: With dead ends: 188 [2020-10-16 11:41:05,261 INFO L226 Difference]: Without dead ends: 186 [2020-10-16 11:41:05,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:05,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-16 11:41:05,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-10-16 11:41:05,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-16 11:41:05,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-10-16 11:41:05,266 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-10-16 11:41:05,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:05,266 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-10-16 11:41:05,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:05,266 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-10-16 11:41:05,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:05,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:05,267 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:05,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-16 11:41:05,478 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:05,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:05,479 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-10-16 11:41:05,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:05,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274147670] [2020-10-16 11:41:05,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:05,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274147670] [2020-10-16 11:41:05,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344243694] [2020-10-16 11:41:05,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:05,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:05,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:05,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:05,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:05,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:05,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:05,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731641234] [2020-10-16 11:41:05,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:05,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:05,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:05,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:05,923 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-10-16 11:41:06,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:06,161 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-10-16 11:41:06,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:06,162 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:06,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:06,163 INFO L225 Difference]: With dead ends: 199 [2020-10-16 11:41:06,163 INFO L226 Difference]: Without dead ends: 197 [2020-10-16 11:41:06,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:41:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-16 11:41:06,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-10-16 11:41:06,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-16 11:41:06,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-16 11:41:06,166 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-16 11:41:06,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:06,166 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-16 11:41:06,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:06,166 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-16 11:41:06,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:06,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:06,166 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:06,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-16 11:41:06,367 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:06,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:06,368 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-10-16 11:41:06,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:06,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687672751] [2020-10-16 11:41:06,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:06,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687672751] [2020-10-16 11:41:06,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564079804] [2020-10-16 11:41:06,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:06,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:06,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:06,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:06,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:06,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788016752] [2020-10-16 11:41:06,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:06,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:06,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:06,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:06,771 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-16 11:41:07,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:07,077 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-16 11:41:07,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:07,077 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:07,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:07,078 INFO L225 Difference]: With dead ends: 210 [2020-10-16 11:41:07,078 INFO L226 Difference]: Without dead ends: 208 [2020-10-16 11:41:07,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:41:07,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-16 11:41:07,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-10-16 11:41:07,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-16 11:41:07,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-10-16 11:41:07,080 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-10-16 11:41:07,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:07,081 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-10-16 11:41:07,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:07,081 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-10-16 11:41:07,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:07,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:07,081 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:07,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-16 11:41:07,282 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:07,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:07,282 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-10-16 11:41:07,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:07,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183654029] [2020-10-16 11:41:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:07,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183654029] [2020-10-16 11:41:07,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584535754] [2020-10-16 11:41:07,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:07,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:07,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:07,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:07,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:07,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:07,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:07,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061780924] [2020-10-16 11:41:07,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:07,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:07,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:07,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:07,671 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-10-16 11:41:08,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:08,014 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-16 11:41:08,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:08,015 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:08,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:08,016 INFO L225 Difference]: With dead ends: 210 [2020-10-16 11:41:08,016 INFO L226 Difference]: Without dead ends: 208 [2020-10-16 11:41:08,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-16 11:41:08,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-10-16 11:41:08,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-16 11:41:08,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-16 11:41:08,019 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-16 11:41:08,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:08,019 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-16 11:41:08,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:08,019 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-16 11:41:08,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:08,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:08,020 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:08,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-16 11:41:08,223 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:08,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:08,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-10-16 11:41:08,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:08,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802565845] [2020-10-16 11:41:08,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:08,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802565845] [2020-10-16 11:41:08,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332519542] [2020-10-16 11:41:08,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:08,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:41:08,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:08,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:08,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:11,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:11,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:11,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338901834] [2020-10-16 11:41:11,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:11,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:11,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:11,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-16 11:41:11,374 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-16 11:41:15,593 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 11:41:15,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:15,859 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-16 11:41:15,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:15,860 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:15,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:15,860 INFO L225 Difference]: With dead ends: 218 [2020-10-16 11:41:15,860 INFO L226 Difference]: Without dead ends: 216 [2020-10-16 11:41:15,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-16 11:41:15,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-16 11:41:15,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-16 11:41:15,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-16 11:41:15,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-16 11:41:15,864 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-16 11:41:15,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:15,865 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-16 11:41:15,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:15,865 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-16 11:41:15,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:15,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:15,865 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:16,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:16,066 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:16,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:16,067 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-10-16 11:41:16,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:16,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150266560] [2020-10-16 11:41:16,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:16,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150266560] [2020-10-16 11:41:16,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173882238] [2020-10-16 11:41:16,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:16,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:16,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:16,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:16,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:17,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:17,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:17,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630295406] [2020-10-16 11:41:17,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:17,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:17,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:17,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:17,110 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-16 11:41:17,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:17,496 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-10-16 11:41:17,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:17,497 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:17,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:17,498 INFO L225 Difference]: With dead ends: 212 [2020-10-16 11:41:17,498 INFO L226 Difference]: Without dead ends: 210 [2020-10-16 11:41:17,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:17,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-16 11:41:17,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-10-16 11:41:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-16 11:41:17,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-10-16 11:41:17,502 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-10-16 11:41:17,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:17,503 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-10-16 11:41:17,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:17,503 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-10-16 11:41:17,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:17,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:17,503 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:17,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:17,704 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:17,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:17,705 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-10-16 11:41:17,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:17,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964879362] [2020-10-16 11:41:17,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:17,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964879362] [2020-10-16 11:41:17,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400522437] [2020-10-16 11:41:17,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:17,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:17,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:17,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:17,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:18,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:18,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:18,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:18,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615167312] [2020-10-16 11:41:18,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:18,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:18,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:18,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:18,044 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-10-16 11:41:18,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:18,392 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-16 11:41:18,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:18,393 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:18,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:18,394 INFO L225 Difference]: With dead ends: 212 [2020-10-16 11:41:18,394 INFO L226 Difference]: Without dead ends: 210 [2020-10-16 11:41:18,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:41:18,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-16 11:41:18,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-10-16 11:41:18,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-16 11:41:18,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-16 11:41:18,397 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-16 11:41:18,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:18,397 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-16 11:41:18,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:18,398 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-16 11:41:18,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:18,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:18,398 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:18,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:18,599 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:18,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:18,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-10-16 11:41:18,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:18,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83649468] [2020-10-16 11:41:18,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:18,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83649468] [2020-10-16 11:41:18,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455431394] [2020-10-16 11:41:18,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:18,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:41:18,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:18,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:18,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:18,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:18,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:18,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244575028] [2020-10-16 11:41:18,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:18,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:18,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:18,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:18,954 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-16 11:41:19,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:19,330 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-10-16 11:41:19,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:19,330 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:19,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:19,331 INFO L225 Difference]: With dead ends: 224 [2020-10-16 11:41:19,331 INFO L226 Difference]: Without dead ends: 222 [2020-10-16 11:41:19,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:41:19,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-16 11:41:19,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-10-16 11:41:19,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-16 11:41:19,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-16 11:41:19,334 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-16 11:41:19,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:19,334 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-16 11:41:19,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:19,335 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-16 11:41:19,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:19,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:19,335 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:19,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:19,537 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:19,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:19,538 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-10-16 11:41:19,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:19,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826692455] [2020-10-16 11:41:19,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:19,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826692455] [2020-10-16 11:41:19,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537817453] [2020-10-16 11:41:19,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:19,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:19,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:19,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:19,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:19,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978775126] [2020-10-16 11:41:19,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:19,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:19,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:19,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:19,871 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-16 11:41:20,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:20,194 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-10-16 11:41:20,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:20,195 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:20,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:20,195 INFO L225 Difference]: With dead ends: 218 [2020-10-16 11:41:20,196 INFO L226 Difference]: Without dead ends: 216 [2020-10-16 11:41:20,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:20,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-16 11:41:20,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-16 11:41:20,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-16 11:41:20,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-16 11:41:20,199 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-16 11:41:20,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:20,199 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-16 11:41:20,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:20,199 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-16 11:41:20,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:20,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:20,200 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:20,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:20,401 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:20,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:20,401 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-10-16 11:41:20,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:20,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015918170] [2020-10-16 11:41:20,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:20,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015918170] [2020-10-16 11:41:20,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24876215] [2020-10-16 11:41:20,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:20,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:20,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:20,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:20,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:20,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:20,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:20,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762061154] [2020-10-16 11:41:20,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:20,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:20,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:20,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:20,739 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-16 11:41:21,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:21,021 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-10-16 11:41:21,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:21,022 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:21,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:21,022 INFO L225 Difference]: With dead ends: 206 [2020-10-16 11:41:21,022 INFO L226 Difference]: Without dead ends: 204 [2020-10-16 11:41:21,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:21,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-16 11:41:21,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-10-16 11:41:21,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-16 11:41:21,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-10-16 11:41:21,026 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-10-16 11:41:21,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:21,026 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-10-16 11:41:21,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:21,026 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-10-16 11:41:21,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:21,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:21,026 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:21,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-16 11:41:21,227 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:21,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:21,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-10-16 11:41:21,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:21,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042708418] [2020-10-16 11:41:21,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:21,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042708418] [2020-10-16 11:41:21,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771372282] [2020-10-16 11:41:21,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:21,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:41:21,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:21,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:21,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:21,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:21,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:21,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:21,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350985079] [2020-10-16 11:41:21,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:21,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:21,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:21,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:21,567 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-10-16 11:41:21,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:21,854 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-10-16 11:41:21,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:21,855 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:21,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:21,856 INFO L225 Difference]: With dead ends: 207 [2020-10-16 11:41:21,856 INFO L226 Difference]: Without dead ends: 205 [2020-10-16 11:41:21,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:21,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-16 11:41:21,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-10-16 11:41:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-16 11:41:21,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-10-16 11:41:21,861 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-10-16 11:41:21,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:21,861 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-10-16 11:41:21,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:21,861 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-10-16 11:41:21,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:21,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:21,862 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:22,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-16 11:41:22,072 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:22,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:22,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-10-16 11:41:22,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:22,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371156628] [2020-10-16 11:41:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:22,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371156628] [2020-10-16 11:41:22,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596405959] [2020-10-16 11:41:22,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:22,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:22,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:22,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:22,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:22,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:22,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:22,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519817685] [2020-10-16 11:41:22,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:22,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:22,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:22,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:22,425 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-10-16 11:41:22,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:22,731 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-10-16 11:41:22,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:22,732 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:22,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:22,732 INFO L225 Difference]: With dead ends: 217 [2020-10-16 11:41:22,732 INFO L226 Difference]: Without dead ends: 215 [2020-10-16 11:41:22,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:22,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-16 11:41:22,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-10-16 11:41:22,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-16 11:41:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-10-16 11:41:22,736 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-10-16 11:41:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:22,736 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-10-16 11:41:22,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:22,736 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-10-16 11:41:22,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:22,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:22,737 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:22,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-16 11:41:22,946 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:22,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-10-16 11:41:22,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:22,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713253908] [2020-10-16 11:41:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:23,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713253908] [2020-10-16 11:41:23,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492681033] [2020-10-16 11:41:23,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:23,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:23,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:23,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:23,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:23,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:23,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:23,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142490008] [2020-10-16 11:41:23,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:23,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:23,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:23,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:23,424 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-10-16 11:41:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:23,832 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-10-16 11:41:23,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:23,832 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:23,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:23,833 INFO L225 Difference]: With dead ends: 223 [2020-10-16 11:41:23,833 INFO L226 Difference]: Without dead ends: 221 [2020-10-16 11:41:23,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-16 11:41:23,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-10-16 11:41:23,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-16 11:41:23,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-10-16 11:41:23,837 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-10-16 11:41:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:23,838 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-10-16 11:41:23,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:23,838 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-10-16 11:41:23,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:23,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:23,839 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:24,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-16 11:41:24,043 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:24,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:24,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-10-16 11:41:24,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:24,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050602325] [2020-10-16 11:41:24,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:24,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:24,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050602325] [2020-10-16 11:41:24,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046775579] [2020-10-16 11:41:24,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:24,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:24,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:24,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:24,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:24,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:24,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:24,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964009474] [2020-10-16 11:41:24,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:24,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:24,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:24,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:24,420 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-10-16 11:41:24,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:24,762 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-10-16 11:41:24,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:24,763 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:24,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:24,764 INFO L225 Difference]: With dead ends: 225 [2020-10-16 11:41:24,764 INFO L226 Difference]: Without dead ends: 223 [2020-10-16 11:41:24,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:24,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-16 11:41:24,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-10-16 11:41:24,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-16 11:41:24,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-10-16 11:41:24,767 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-10-16 11:41:24,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:24,768 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-10-16 11:41:24,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:24,768 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-10-16 11:41:24,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:24,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:24,768 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:24,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:24,969 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:24,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:24,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-10-16 11:41:24,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:24,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318341967] [2020-10-16 11:41:24,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:25,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318341967] [2020-10-16 11:41:25,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927888671] [2020-10-16 11:41:25,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:25,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:25,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:25,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:25,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:25,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778664033] [2020-10-16 11:41:25,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:25,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:25,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:25,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:25,345 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-10-16 11:41:25,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:25,665 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-10-16 11:41:25,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:25,666 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:25,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:25,667 INFO L225 Difference]: With dead ends: 214 [2020-10-16 11:41:25,667 INFO L226 Difference]: Without dead ends: 212 [2020-10-16 11:41:25,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:25,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-16 11:41:25,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-10-16 11:41:25,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-16 11:41:25,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-10-16 11:41:25,670 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-10-16 11:41:25,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:25,670 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-10-16 11:41:25,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:25,671 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-10-16 11:41:25,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:25,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:25,671 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:25,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:25,872 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:25,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:25,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-10-16 11:41:25,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:25,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332615263] [2020-10-16 11:41:25,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:26,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332615263] [2020-10-16 11:41:26,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163621687] [2020-10-16 11:41:26,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:26,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:26,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:26,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:26,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:26,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:26,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:26,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867635331] [2020-10-16 11:41:26,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:26,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:26,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:26,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:26,270 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-10-16 11:41:26,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:26,496 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-10-16 11:41:26,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:26,496 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:26,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:26,497 INFO L225 Difference]: With dead ends: 203 [2020-10-16 11:41:26,497 INFO L226 Difference]: Without dead ends: 201 [2020-10-16 11:41:26,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:41:26,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-16 11:41:26,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-10-16 11:41:26,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-16 11:41:26,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-10-16 11:41:26,500 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-10-16 11:41:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:26,501 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-10-16 11:41:26,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:26,501 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-10-16 11:41:26,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:26,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:26,501 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:26,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-16 11:41:26,702 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:26,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:26,702 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-10-16 11:41:26,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:26,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557165558] [2020-10-16 11:41:26,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:26,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557165558] [2020-10-16 11:41:26,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050190402] [2020-10-16 11:41:26,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:26,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:26,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:26,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:26,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:27,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:27,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:27,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907343532] [2020-10-16 11:41:27,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:27,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:27,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:27,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:27,135 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-10-16 11:41:27,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:27,217 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-16 11:41:27,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:27,218 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:27,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:27,219 INFO L225 Difference]: With dead ends: 212 [2020-10-16 11:41:27,219 INFO L226 Difference]: Without dead ends: 210 [2020-10-16 11:41:27,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:41:27,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-16 11:41:27,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-10-16 11:41:27,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-16 11:41:27,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-10-16 11:41:27,223 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-10-16 11:41:27,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:27,223 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-10-16 11:41:27,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:27,223 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-10-16 11:41:27,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:27,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:27,224 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:27,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:27,424 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:27,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:27,425 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-10-16 11:41:27,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:27,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199761089] [2020-10-16 11:41:27,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:27,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199761089] [2020-10-16 11:41:27,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877732191] [2020-10-16 11:41:27,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:27,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:27,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:27,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:27,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:27,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:27,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:27,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935209853] [2020-10-16 11:41:27,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:27,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:27,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:27,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:27,831 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-10-16 11:41:28,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:28,104 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-10-16 11:41:28,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:28,105 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:28,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:28,106 INFO L225 Difference]: With dead ends: 217 [2020-10-16 11:41:28,106 INFO L226 Difference]: Without dead ends: 215 [2020-10-16 11:41:28,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:41:28,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-16 11:41:28,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-10-16 11:41:28,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-16 11:41:28,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-16 11:41:28,110 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-16 11:41:28,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:28,111 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-16 11:41:28,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:28,111 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-16 11:41:28,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:28,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:28,112 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:28,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:28,321 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:28,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:28,322 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-10-16 11:41:28,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:28,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63345283] [2020-10-16 11:41:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:28,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63345283] [2020-10-16 11:41:28,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100364317] [2020-10-16 11:41:28,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:28,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:28,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:28,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:28,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:28,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:28,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:28,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019863370] [2020-10-16 11:41:28,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:28,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:28,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:28,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:28,770 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-16 11:41:29,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:29,126 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-16 11:41:29,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:29,127 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:29,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:29,128 INFO L225 Difference]: With dead ends: 227 [2020-10-16 11:41:29,128 INFO L226 Difference]: Without dead ends: 225 [2020-10-16 11:41:29,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:29,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-16 11:41:29,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-10-16 11:41:29,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-16 11:41:29,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-10-16 11:41:29,130 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-10-16 11:41:29,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:29,131 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-10-16 11:41:29,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:29,131 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-10-16 11:41:29,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:29,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:29,131 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:29,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:29,332 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:29,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:29,333 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-10-16 11:41:29,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:29,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527494301] [2020-10-16 11:41:29,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:29,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527494301] [2020-10-16 11:41:29,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513360565] [2020-10-16 11:41:29,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:29,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:29,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:29,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:29,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:29,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:29,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:29,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700242469] [2020-10-16 11:41:29,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:29,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:29,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:29,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:29,737 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-10-16 11:41:30,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:30,155 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-16 11:41:30,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:41:30,156 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:30,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:30,157 INFO L225 Difference]: With dead ends: 227 [2020-10-16 11:41:30,157 INFO L226 Difference]: Without dead ends: 225 [2020-10-16 11:41:30,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:41:30,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-16 11:41:30,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-10-16 11:41:30,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-16 11:41:30,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-16 11:41:30,161 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-16 11:41:30,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:30,161 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-16 11:41:30,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:30,161 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-16 11:41:30,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:30,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:30,162 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:30,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-16 11:41:30,364 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:30,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:30,364 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-10-16 11:41:30,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:30,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985727249] [2020-10-16 11:41:30,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:30,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:30,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985727249] [2020-10-16 11:41:30,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417216183] [2020-10-16 11:41:30,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:30,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:30,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:33,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:33,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:33,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889805129] [2020-10-16 11:41:33,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:33,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:33,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:33,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-16 11:41:33,571 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-16 11:41:37,810 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-16 11:41:38,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:38,144 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-10-16 11:41:38,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:38,145 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:38,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:38,145 INFO L225 Difference]: With dead ends: 237 [2020-10-16 11:41:38,145 INFO L226 Difference]: Without dead ends: 235 [2020-10-16 11:41:38,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-16 11:41:38,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-16 11:41:38,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-10-16 11:41:38,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-16 11:41:38,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-16 11:41:38,155 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-16 11:41:38,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:38,155 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-16 11:41:38,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:38,155 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-16 11:41:38,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:38,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:38,155 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:38,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-16 11:41:38,356 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:38,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:38,357 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-10-16 11:41:38,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:38,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036547524] [2020-10-16 11:41:38,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:38,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036547524] [2020-10-16 11:41:38,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467974573] [2020-10-16 11:41:38,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:38,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:38,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:38,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:38,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:39,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:39,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:41:39,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266357037] [2020-10-16 11:41:39,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:41:39,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:39,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:41:39,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:39,461 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-16 11:41:39,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:39,930 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-10-16 11:41:39,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:39,930 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-16 11:41:39,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:39,931 INFO L225 Difference]: With dead ends: 229 [2020-10-16 11:41:39,931 INFO L226 Difference]: Without dead ends: 227 [2020-10-16 11:41:39,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:41:39,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-16 11:41:39,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-16 11:41:39,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-16 11:41:39,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-10-16 11:41:39,935 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-10-16 11:41:39,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:39,935 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-10-16 11:41:39,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:41:39,935 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-10-16 11:41:39,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:39,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:39,936 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] Received shutdown request... [2020-10-16 11:41:40,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-16 11:41:40,144 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:40,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:40,145 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-10-16 11:41:40,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:40,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039170929] [2020-10-16 11:41:40,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:40,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:40,160 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2020-10-16 11:41:40,165 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2020-10-16 11:41:40,166 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2020-10-16 11:41:40,176 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2020-10-16 11:41:40,177 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2020-10-16 11:41:40,178 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2020-10-16 11:41:40,180 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2020-10-16 11:41:40,181 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2020-10-16 11:41:40,182 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2020-10-16 11:41:40,182 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2020-10-16 11:41:40,183 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2020-10-16 11:41:40,183 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2020-10-16 11:41:40,184 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2020-10-16 11:41:40,184 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2020-10-16 11:41:40,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2020-10-16 11:41:40,186 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 11:41:40,191 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 11:41:40,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 11:41:40 BasicIcfg [2020-10-16 11:41:40,192 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 11:41:40,194 INFO L168 Benchmark]: Toolchain (without parser) took 280048.17 ms. Allocated memory was 136.3 MB in the beginning and 262.1 MB in the end (delta: 125.8 MB). Free memory was 97.8 MB in the beginning and 109.3 MB in the end (delta: -11.4 MB). Peak memory consumption was 114.4 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:40,194 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 136.3 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-16 11:41:40,195 INFO L168 Benchmark]: CACSL2BoogieTranslator took 761.00 ms. Allocated memory was 136.3 MB in the beginning and 198.2 MB in the end (delta: 61.9 MB). Free memory was 97.4 MB in the beginning and 157.4 MB in the end (delta: -60.0 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:40,195 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.10 ms. Allocated memory is still 198.2 MB. Free memory was 157.4 MB in the beginning and 155.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:40,195 INFO L168 Benchmark]: Boogie Preprocessor took 27.21 ms. Allocated memory is still 198.2 MB. Free memory was 155.4 MB in the beginning and 154.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:40,196 INFO L168 Benchmark]: RCFGBuilder took 429.18 ms. Allocated memory is still 198.2 MB. Free memory was 154.0 MB in the beginning and 133.2 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:40,198 INFO L168 Benchmark]: TraceAbstraction took 278757.36 ms. Allocated memory was 198.2 MB in the beginning and 262.1 MB in the end (delta: 64.0 MB). Free memory was 132.5 MB in the beginning and 109.3 MB in the end (delta: 23.3 MB). Peak memory consumption was 87.2 MB. Max. memory is 7.1 GB. [2020-10-16 11:41:40,200 INFO L336 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 136.3 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 761.00 ms. Allocated memory was 136.3 MB in the beginning and 198.2 MB in the end (delta: 61.9 MB). Free memory was 97.4 MB in the beginning and 157.4 MB in the end (delta: -60.0 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 67.10 ms. Allocated memory is still 198.2 MB. Free memory was 157.4 MB in the beginning and 155.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.21 ms. Allocated memory is still 198.2 MB. Free memory was 155.4 MB in the beginning and 154.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 429.18 ms. Allocated memory is still 198.2 MB. Free memory was 154.0 MB in the beginning and 133.2 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 278757.36 ms. Allocated memory was 198.2 MB in the beginning and 262.1 MB in the end (delta: 64.0 MB). Free memory was 132.5 MB in the beginning and 109.3 MB in the end (delta: 23.3 MB). Peak memory consumption was 87.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 561 VarBasedMoverChecksPositive, 10 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.1s, 59 PlacesBefore, 20 PlacesAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 50 TotalNumberOfCompositions, 943 MoverChecksTotal - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was analyzing trace of length 15 with TraceHistMax 4,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while NestedInterpolantsBuilder was constructing predicates for 13 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 278.6s, OverallIterations: 169, TraceHistogramMax: 6, AutomataDifference: 184.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 2198 SDtfs, 14846 SDslu, 14697 SDs, 0 SdLazy, 10445 SolverSat, 3556 SolverUnsat, 44 SolverUnknown, 0 SolverNotchecked, 89.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4103 GetRequests, 790 SyntacticMatches, 141 SemanticMatches, 3172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15895 ImplicationChecksByTransitivity, 134.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=163, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 168 MinimizatonAttempts, 7496 StatesRemovedByMinimization, 168 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 50.3s InterpolantComputationTime, 4054 NumberOfCodeBlocks, 4054 NumberOfCodeBlocksAsserted, 507 NumberOfCheckSat, 3726 ConstructedInterpolants, 8 QuantifiedInterpolants, 381907 SizeOfPredicates, 160 NumberOfNonLiveVariables, 13770 ConjunctsInSsa, 1548 ConjunctsInUnsatCore, 328 InterpolantComputations, 8 PerfectInterpolantSequences, 0/1524 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