/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-McrAutomaton-SP.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-1d1d2b5 [2020-10-22 01:18:47,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-22 01:18:47,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-22 01:18:47,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-22 01:18:47,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-22 01:18:47,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-22 01:18:47,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-22 01:18:47,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-22 01:18:47,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-22 01:18:47,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-22 01:18:47,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-22 01:18:47,820 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-22 01:18:47,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-22 01:18:47,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-22 01:18:47,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-22 01:18:47,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-22 01:18:47,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-22 01:18:47,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-22 01:18:47,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-22 01:18:47,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-22 01:18:47,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-22 01:18:47,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-22 01:18:47,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-22 01:18:47,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-22 01:18:47,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-22 01:18:47,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-22 01:18:47,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-22 01:18:47,838 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-22 01:18:47,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-22 01:18:47,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-22 01:18:47,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-22 01:18:47,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-22 01:18:47,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-22 01:18:47,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-22 01:18:47,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-22 01:18:47,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-22 01:18:47,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-22 01:18:47,844 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-22 01:18:47,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-22 01:18:47,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-22 01:18:47,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-22 01:18:47,847 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-SP.epf [2020-10-22 01:18:47,883 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-22 01:18:47,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-22 01:18:47,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-22 01:18:47,887 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-22 01:18:47,887 INFO L138 SettingsManager]: * Use SBE=true [2020-10-22 01:18:47,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-22 01:18:47,888 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-22 01:18:47,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-22 01:18:47,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-22 01:18:47,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-22 01:18:47,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-22 01:18:47,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-22 01:18:47,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-22 01:18:47,889 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-22 01:18:47,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-22 01:18:47,889 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-22 01:18:47,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-22 01:18:47,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-22 01:18:47,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-22 01:18:47,892 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-22 01:18:47,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-22 01:18:47,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-22 01:18:47,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-22 01:18:47,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-22 01:18:47,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-22 01:18:47,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-22 01:18:47,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-22 01:18:47,894 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-10-22 01:18:47,895 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-22 01:18:47,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-22 01:18:47,895 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-10-22 01:18:48,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-22 01:18:48,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-22 01:18:48,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-22 01:18:48,225 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-22 01:18:48,226 INFO L275 PluginConnector]: CDTParser initialized [2020-10-22 01:18:48,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-22 01:18:48,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a732f721/22cb1fdafb7d47da86a406352775cd17/FLAG20bac8d09 [2020-10-22 01:18:48,829 INFO L306 CDTParser]: Found 1 translation units. [2020-10-22 01:18:48,830 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-22 01:18:48,843 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a732f721/22cb1fdafb7d47da86a406352775cd17/FLAG20bac8d09 [2020-10-22 01:18:49,170 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a732f721/22cb1fdafb7d47da86a406352775cd17 [2020-10-22 01:18:49,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-22 01:18:49,185 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-22 01:18:49,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-22 01:18:49,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-22 01:18:49,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-22 01:18:49,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 01:18:49" (1/1) ... [2020-10-22 01:18:49,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69f92650 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:49, skipping insertion in model container [2020-10-22 01:18:49,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 01:18:49" (1/1) ... [2020-10-22 01:18:49,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-22 01:18:49,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-22 01:18:49,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-22 01:18:49,802 INFO L203 MainTranslator]: Completed pre-run [2020-10-22 01:18:49,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-22 01:18:49,948 INFO L208 MainTranslator]: Completed translation [2020-10-22 01:18:49,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:49 WrapperNode [2020-10-22 01:18:49,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-22 01:18:49,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-22 01:18:49,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-22 01:18:49,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-22 01:18:49,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:49" (1/1) ... [2020-10-22 01:18:49,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:49" (1/1) ... [2020-10-22 01:18:49,997 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-22 01:18:49,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-22 01:18:49,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-22 01:18:49,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-22 01:18:50,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:49" (1/1) ... [2020-10-22 01:18:50,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:49" (1/1) ... [2020-10-22 01:18:50,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:49" (1/1) ... [2020-10-22 01:18:50,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:49" (1/1) ... [2020-10-22 01:18:50,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:49" (1/1) ... [2020-10-22 01:18:50,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:49" (1/1) ... [2020-10-22 01:18:50,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:49" (1/1) ... [2020-10-22 01:18:50,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-22 01:18:50,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-22 01:18:50,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-22 01:18:50,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-22 01:18:50,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-22 01:18:50,093 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-22 01:18:50,093 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-22 01:18:50,093 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-22 01:18:50,093 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-22 01:18:50,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-22 01:18:50,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-22 01:18:50,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-22 01:18:50,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-22 01:18:50,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-22 01:18:50,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-22 01:18:50,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-22 01:18:50,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-22 01:18:50,100 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-22 01:18:50,498 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-22 01:18:50,498 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-22 01:18:50,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 01:18:50 BoogieIcfgContainer [2020-10-22 01:18:50,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-22 01:18:50,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-22 01:18:50,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-22 01:18:50,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-22 01:18:50,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 01:18:49" (1/3) ... [2020-10-22 01:18:50,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b94c35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 01:18:50, skipping insertion in model container [2020-10-22 01:18:50,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:49" (2/3) ... [2020-10-22 01:18:50,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b94c35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 01:18:50, skipping insertion in model container [2020-10-22 01:18:50,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 01:18:50" (3/3) ... [2020-10-22 01:18:50,510 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-10-22 01:18:50,520 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-22 01:18:50,520 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-22 01:18:50,527 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-22 01:18:50,528 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-22 01:18:50,552 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,553 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,553 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,553 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,554 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,554 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,555 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,555 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,555 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,555 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,556 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,556 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,556 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,556 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,557 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,557 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,557 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,557 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,558 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,558 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,558 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,559 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,559 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,559 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,559 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,560 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,560 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,560 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,564 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,564 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,564 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,565 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,565 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,565 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,572 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,573 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,573 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,573 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,573 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,573 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:50,576 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-22 01:18:50,591 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-22 01:18:50,613 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-22 01:18:50,614 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-22 01:18:50,614 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-22 01:18:50,614 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-22 01:18:50,614 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-22 01:18:50,614 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-22 01:18:50,615 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-22 01:18:50,615 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-22 01:18:50,628 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-22 01:18:50,629 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-22 01:18:50,632 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-22 01:18:50,634 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-10-22 01:18:50,677 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-10-22 01:18:50,677 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-22 01:18:50,683 INFO L80 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-10-22 01:18:50,686 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-10-22 01:18:52,042 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-22 01:18:52,425 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-22 01:18:52,583 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-22 01:18:52,621 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-10-22 01:18:52,621 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-10-22 01:18:52,630 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-22 01:18:52,654 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-22 01:18:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-22 01:18:52,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-22 01:18:52,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:52,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-22 01:18:52,666 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:52,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:52,671 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-10-22 01:18:52,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:52,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084135888] [2020-10-22 01:18:52,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:52,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084135888] [2020-10-22 01:18:52,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-22 01:18:52,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-22 01:18:52,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2025918580] [2020-10-22 01:18:52,927 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:52,933 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:52,949 INFO L252 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-10-22 01:18:52,949 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:52,957 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:18:52,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-22 01:18:52,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:52,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-22 01:18:52,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-22 01:18:52,976 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-22 01:18:53,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:53,048 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-22 01:18:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-22 01:18:53,050 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-22 01:18:53,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:53,061 INFO L225 Difference]: With dead ends: 75 [2020-10-22 01:18:53,061 INFO L226 Difference]: Without dead ends: 42 [2020-10-22 01:18:53,062 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 [2020-10-22 01:18:53,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-22 01:18:53,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-22 01:18:53,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-22 01:18:53,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-22 01:18:53,102 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-22 01:18:53,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:53,102 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-22 01:18:53,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-22 01:18:53,102 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-22 01:18:53,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-22 01:18:53,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:53,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:53,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-22 01:18:53,104 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:53,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:53,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-10-22 01:18:53,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:53,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330535095] [2020-10-22 01:18:53,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:53,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330535095] [2020-10-22 01:18:53,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-22 01:18:53,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-22 01:18:53,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1112524005] [2020-10-22 01:18:53,194 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:53,195 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:53,198 INFO L252 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-10-22 01:18:53,198 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:53,247 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:18:53,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-22 01:18:53,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:53,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-22 01:18:53,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-22 01:18:53,249 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-22 01:18:53,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:53,281 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-22 01:18:53,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-22 01:18:53,282 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-22 01:18:53,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:53,283 INFO L225 Difference]: With dead ends: 56 [2020-10-22 01:18:53,283 INFO L226 Difference]: Without dead ends: 50 [2020-10-22 01:18:53,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-22 01:18:53,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-22 01:18:53,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-22 01:18:53,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-22 01:18:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-22 01:18:53,292 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-22 01:18:53,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:53,293 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-22 01:18:53,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-22 01:18:53,293 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-22 01:18:53,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-22 01:18:53,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:53,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:53,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-22 01:18:53,295 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:53,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:53,295 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-10-22 01:18:53,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:53,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408810202] [2020-10-22 01:18:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:53,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408810202] [2020-10-22 01:18:53,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-22 01:18:53,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-22 01:18:53,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1792240758] [2020-10-22 01:18:53,424 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:53,426 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:53,429 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 25 transitions. [2020-10-22 01:18:53,429 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:53,440 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:18:53,440 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:18:53,522 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:18:53,522 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:18:53,537 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [474#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-22 01:18:53,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-22 01:18:53,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:53,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-22 01:18:53,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-22 01:18:53,539 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-10-22 01:18:53,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:53,668 INFO L93 Difference]: Finished difference Result 66 states and 152 transitions. [2020-10-22 01:18:53,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-22 01:18:53,669 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-10-22 01:18:53,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:53,670 INFO L225 Difference]: With dead ends: 66 [2020-10-22 01:18:53,670 INFO L226 Difference]: Without dead ends: 50 [2020-10-22 01:18:53,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-22 01:18:53,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-22 01:18:53,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-22 01:18:53,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-22 01:18:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2020-10-22 01:18:53,678 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 10 [2020-10-22 01:18:53,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:53,681 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2020-10-22 01:18:53,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-22 01:18:53,681 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2020-10-22 01:18:53,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-22 01:18:53,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:53,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:53,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-22 01:18:53,683 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:53,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:53,683 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 2 times [2020-10-22 01:18:53,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:53,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642963704] [2020-10-22 01:18:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:53,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642963704] [2020-10-22 01:18:53,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-22 01:18:53,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-22 01:18:53,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1226767245] [2020-10-22 01:18:53,751 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:53,752 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:53,754 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-10-22 01:18:53,754 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:53,805 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:18:53,806 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:18:53,876 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [639#(and (<= ~i~0 7) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:18:53,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-22 01:18:53,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:53,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-22 01:18:53,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-22 01:18:53,878 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 7 states. [2020-10-22 01:18:53,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:53,952 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-22 01:18:53,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-22 01:18:53,956 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-10-22 01:18:53,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:53,957 INFO L225 Difference]: With dead ends: 67 [2020-10-22 01:18:53,957 INFO L226 Difference]: Without dead ends: 54 [2020-10-22 01:18:53,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-22 01:18:53,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-22 01:18:53,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-10-22 01:18:53,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-22 01:18:53,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-22 01:18:53,964 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 10 [2020-10-22 01:18:53,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:53,964 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-22 01:18:53,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-22 01:18:53,964 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-22 01:18:53,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-22 01:18:53,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:53,966 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:53,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-22 01:18:53,966 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:53,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:53,967 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 3 times [2020-10-22 01:18:53,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:53,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069462499] [2020-10-22 01:18:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:54,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069462499] [2020-10-22 01:18:54,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835931902] [2020-10-22 01:18:54,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:18:54,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-22 01:18:54,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:18:54,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-22 01:18:54,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:18:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:54,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:18:54,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-22 01:18:54,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1726073865] [2020-10-22 01:18:54,158 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:54,159 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:54,162 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-10-22 01:18:54,162 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:54,201 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [835#(and (<= ~i~0 5) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:18:54,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-22 01:18:54,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:54,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-22 01:18:54,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-22 01:18:54,202 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 8 states. [2020-10-22 01:18:54,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:54,352 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-10-22 01:18:54,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-22 01:18:54,353 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-22 01:18:54,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:54,354 INFO L225 Difference]: With dead ends: 63 [2020-10-22 01:18:54,354 INFO L226 Difference]: Without dead ends: 54 [2020-10-22 01:18:54,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2020-10-22 01:18:54,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-22 01:18:54,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-10-22 01:18:54,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-22 01:18:54,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-10-22 01:18:54,361 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-10-22 01:18:54,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:54,362 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-10-22 01:18:54,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-22 01:18:54,362 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-10-22 01:18:54,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-22 01:18:54,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:54,363 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:54,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:18:54,579 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:54,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:54,579 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 4 times [2020-10-22 01:18:54,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:54,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647746911] [2020-10-22 01:18:54,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:54,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647746911] [2020-10-22 01:18:54,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115751013] [2020-10-22 01:18:54,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:18:54,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:18:54,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:18:54,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-22 01:18:54,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:18:54,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:18:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:54,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:18:54,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-22 01:18:54,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1480741607] [2020-10-22 01:18:54,763 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:54,764 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:54,766 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 23 transitions. [2020-10-22 01:18:54,766 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:54,826 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:18:54,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-22 01:18:54,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:54,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-22 01:18:54,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-22 01:18:54,827 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 7 states. [2020-10-22 01:18:54,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:54,944 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-10-22 01:18:54,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-22 01:18:54,946 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-22 01:18:54,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:54,947 INFO L225 Difference]: With dead ends: 56 [2020-10-22 01:18:54,947 INFO L226 Difference]: Without dead ends: 51 [2020-10-22 01:18:54,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-22 01:18:54,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-22 01:18:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-10-22 01:18:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-22 01:18:54,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-22 01:18:54,953 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-22 01:18:54,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:54,953 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-22 01:18:54,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-22 01:18:54,953 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-22 01:18:54,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-22 01:18:54,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:54,954 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:55,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:18:55,167 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:55,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:55,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 5 times [2020-10-22 01:18:55,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:55,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603318295] [2020-10-22 01:18:55,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:55,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603318295] [2020-10-22 01:18:55,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531251938] [2020-10-22 01:18:55,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:18:55,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:18:55,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:18:55,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-22 01:18:55,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:18:55,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:18:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:55,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:18:55,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-22 01:18:55,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [512473100] [2020-10-22 01:18:55,352 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:55,353 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:55,356 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-10-22 01:18:55,357 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:55,362 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:18:55,362 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:18:55,392 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:18:55,392 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:18:55,438 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:18:55,439 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:18:55,460 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1218#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-22 01:18:55,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-22 01:18:55,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:55,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-22 01:18:55,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-22 01:18:55,461 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 9 states. [2020-10-22 01:18:55,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:55,585 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-10-22 01:18:55,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-22 01:18:55,586 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-22 01:18:55,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:55,587 INFO L225 Difference]: With dead ends: 56 [2020-10-22 01:18:55,587 INFO L226 Difference]: Without dead ends: 50 [2020-10-22 01:18:55,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-22 01:18:55,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-22 01:18:55,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-22 01:18:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-22 01:18:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 113 transitions. [2020-10-22 01:18:55,592 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 113 transitions. Word has length 12 [2020-10-22 01:18:55,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:55,593 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 113 transitions. [2020-10-22 01:18:55,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-22 01:18:55,593 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 113 transitions. [2020-10-22 01:18:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-22 01:18:55,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:55,594 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:55,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:18:55,805 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:55,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:55,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 6 times [2020-10-22 01:18:55,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:55,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139681950] [2020-10-22 01:18:55,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:55,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139681950] [2020-10-22 01:18:55,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216514617] [2020-10-22 01:18:55,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:18:55,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-22 01:18:55,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:18:55,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-22 01:18:55,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:18:56,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:18:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:56,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:18:56,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-22 01:18:56,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1257178326] [2020-10-22 01:18:56,029 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:56,031 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:56,034 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-10-22 01:18:56,034 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:56,073 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:18:56,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-22 01:18:56,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:56,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-22 01:18:56,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-22 01:18:56,074 INFO L87 Difference]: Start difference. First operand 47 states and 113 transitions. Second operand 8 states. [2020-10-22 01:18:56,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:56,297 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-10-22 01:18:56,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-22 01:18:56,297 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-22 01:18:56,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:56,298 INFO L225 Difference]: With dead ends: 64 [2020-10-22 01:18:56,299 INFO L226 Difference]: Without dead ends: 59 [2020-10-22 01:18:56,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-22 01:18:56,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-22 01:18:56,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-10-22 01:18:56,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-22 01:18:56,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2020-10-22 01:18:56,311 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 12 [2020-10-22 01:18:56,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:56,311 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2020-10-22 01:18:56,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-22 01:18:56,311 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2020-10-22 01:18:56,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-22 01:18:56,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:56,312 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:56,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:18:56,524 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:56,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:56,524 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 7 times [2020-10-22 01:18:56,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:56,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585753357] [2020-10-22 01:18:56,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:56,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585753357] [2020-10-22 01:18:56,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041092913] [2020-10-22 01:18:56,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:18:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:56,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-22 01:18:56,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:18:56,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:18:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:56,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:18:56,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-22 01:18:56,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [126952581] [2020-10-22 01:18:56,677 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:56,678 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:56,681 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-10-22 01:18:56,681 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:56,755 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1631#(and (<= ~i~0 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:18:56,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-22 01:18:56,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:56,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-22 01:18:56,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-22 01:18:56,756 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 9 states. [2020-10-22 01:18:56,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:56,918 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-10-22 01:18:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-22 01:18:56,919 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-22 01:18:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:56,920 INFO L225 Difference]: With dead ends: 72 [2020-10-22 01:18:56,921 INFO L226 Difference]: Without dead ends: 63 [2020-10-22 01:18:56,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-22 01:18:56,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-22 01:18:56,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2020-10-22 01:18:56,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-22 01:18:56,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-22 01:18:56,934 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 12 [2020-10-22 01:18:56,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:56,938 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-22 01:18:56,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-22 01:18:56,938 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-22 01:18:56,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-22 01:18:56,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:56,940 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:57,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:18:57,140 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:57,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:57,141 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 8 times [2020-10-22 01:18:57,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:57,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273149117] [2020-10-22 01:18:57,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:57,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273149117] [2020-10-22 01:18:57,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055551454] [2020-10-22 01:18:57,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:18:57,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:18:57,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:18:57,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-22 01:18:57,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:18:57,296 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:18:57,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:57,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:18:57,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-22 01:18:57,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2041042841] [2020-10-22 01:18:57,306 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:57,307 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:57,310 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-10-22 01:18:57,310 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:57,346 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1860#(and (<= ~i~0 7) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:18:57,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-22 01:18:57,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:57,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-22 01:18:57,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-22 01:18:57,347 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 10 states. [2020-10-22 01:18:57,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:57,570 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-10-22 01:18:57,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-22 01:18:57,570 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-22 01:18:57,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:57,571 INFO L225 Difference]: With dead ends: 72 [2020-10-22 01:18:57,571 INFO L226 Difference]: Without dead ends: 63 [2020-10-22 01:18:57,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-22 01:18:57,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-22 01:18:57,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-10-22 01:18:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-22 01:18:57,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-22 01:18:57,576 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-10-22 01:18:57,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:57,576 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-22 01:18:57,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-22 01:18:57,577 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-22 01:18:57,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-22 01:18:57,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:57,578 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:57,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:18:57,789 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:57,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:57,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 9 times [2020-10-22 01:18:57,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:57,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044476182] [2020-10-22 01:18:57,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:57,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044476182] [2020-10-22 01:18:57,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537207855] [2020-10-22 01:18:57,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:18:57,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-22 01:18:57,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:18:57,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-22 01:18:57,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:18:57,950 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:18:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:57,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:18:57,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-22 01:18:57,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1946082271] [2020-10-22 01:18:57,961 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:57,962 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:57,965 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-10-22 01:18:57,965 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:58,019 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:18:58,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-22 01:18:58,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:58,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-22 01:18:58,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-22 01:18:58,021 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-10-22 01:18:58,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:58,221 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-22 01:18:58,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-22 01:18:58,221 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-22 01:18:58,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:58,222 INFO L225 Difference]: With dead ends: 64 [2020-10-22 01:18:58,222 INFO L226 Difference]: Without dead ends: 59 [2020-10-22 01:18:58,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-22 01:18:58,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-22 01:18:58,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-10-22 01:18:58,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-22 01:18:58,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-22 01:18:58,230 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-22 01:18:58,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:58,230 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-22 01:18:58,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-22 01:18:58,230 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-22 01:18:58,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-22 01:18:58,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:58,231 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:58,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:18:58,433 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:58,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:58,433 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 10 times [2020-10-22 01:18:58,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:58,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720253432] [2020-10-22 01:18:58,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:58,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720253432] [2020-10-22 01:18:58,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60547997] [2020-10-22 01:18:58,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:18:58,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:18:58,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:18:58,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-22 01:18:58,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:18:58,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:18:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:58,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:18:58,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-22 01:18:58,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [626960618] [2020-10-22 01:18:58,609 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:58,611 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:58,615 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-10-22 01:18:58,615 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:58,664 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:18:58,665 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:18:58,697 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:18:58,698 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:18:58,725 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:18:58,726 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:18:58,733 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2312#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-22 01:18:58,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-22 01:18:58,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:58,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-22 01:18:58,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-22 01:18:58,735 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 11 states. [2020-10-22 01:18:58,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:58,935 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-10-22 01:18:58,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-22 01:18:58,936 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-22 01:18:58,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:58,937 INFO L225 Difference]: With dead ends: 64 [2020-10-22 01:18:58,937 INFO L226 Difference]: Without dead ends: 58 [2020-10-22 01:18:58,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-22 01:18:58,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-22 01:18:58,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-10-22 01:18:58,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-22 01:18:58,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 129 transitions. [2020-10-22 01:18:58,942 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 129 transitions. Word has length 14 [2020-10-22 01:18:58,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:58,943 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 129 transitions. [2020-10-22 01:18:58,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-22 01:18:58,943 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 129 transitions. [2020-10-22 01:18:58,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-22 01:18:58,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:58,944 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:59,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-22 01:18:59,157 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:59,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:59,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 11 times [2020-10-22 01:18:59,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:59,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391843578] [2020-10-22 01:18:59,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:59,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391843578] [2020-10-22 01:18:59,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958085779] [2020-10-22 01:18:59,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:18:59,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-22 01:18:59,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:18:59,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-22 01:18:59,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:18:59,345 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:18:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:59,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:18:59,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-22 01:18:59,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1028335248] [2020-10-22 01:18:59,357 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:59,359 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:59,363 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-10-22 01:18:59,363 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:59,384 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:18:59,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-22 01:18:59,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:59,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-22 01:18:59,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-22 01:18:59,386 INFO L87 Difference]: Start difference. First operand 53 states and 129 transitions. Second operand 10 states. [2020-10-22 01:18:59,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:59,663 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-22 01:18:59,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-22 01:18:59,663 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-22 01:18:59,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:59,664 INFO L225 Difference]: With dead ends: 74 [2020-10-22 01:18:59,664 INFO L226 Difference]: Without dead ends: 69 [2020-10-22 01:18:59,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-22 01:18:59,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-22 01:18:59,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 46. [2020-10-22 01:18:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-22 01:18:59,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 109 transitions. [2020-10-22 01:18:59,669 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 109 transitions. Word has length 14 [2020-10-22 01:18:59,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:59,669 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 109 transitions. [2020-10-22 01:18:59,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-22 01:18:59,670 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 109 transitions. [2020-10-22 01:18:59,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-22 01:18:59,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:59,670 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:59,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:18:59,881 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:59,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:59,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 12 times [2020-10-22 01:18:59,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:59,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446054103] [2020-10-22 01:18:59,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:59,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446054103] [2020-10-22 01:18:59,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827228556] [2020-10-22 01:18:59,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:19:00,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-22 01:19:00,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:00,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-22 01:19:00,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:00,045 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:00,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:00,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:00,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-22 01:19:00,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1341006919] [2020-10-22 01:19:00,054 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:00,055 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:00,058 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-10-22 01:19:00,058 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:00,128 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2791#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 11))] [2020-10-22 01:19:00,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-22 01:19:00,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:00,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-22 01:19:00,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-22 01:19:00,130 INFO L87 Difference]: Start difference. First operand 46 states and 109 transitions. Second operand 11 states. [2020-10-22 01:19:00,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:00,390 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-10-22 01:19:00,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-22 01:19:00,391 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-22 01:19:00,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:00,392 INFO L225 Difference]: With dead ends: 82 [2020-10-22 01:19:00,392 INFO L226 Difference]: Without dead ends: 73 [2020-10-22 01:19:00,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:19:00,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-22 01:19:00,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-22 01:19:00,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-22 01:19:00,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-22 01:19:00,398 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 14 [2020-10-22 01:19:00,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:00,398 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-22 01:19:00,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-22 01:19:00,398 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-22 01:19:00,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-22 01:19:00,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:00,400 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:00,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:00,610 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:00,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:00,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 13 times [2020-10-22 01:19:00,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:00,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82104669] [2020-10-22 01:19:00,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:00,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82104669] [2020-10-22 01:19:00,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353383781] [2020-10-22 01:19:00,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:19:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:00,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-22 01:19:00,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:00,788 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:00,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:00,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-22 01:19:00,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1094592744] [2020-10-22 01:19:00,798 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:00,800 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:00,802 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-10-22 01:19:00,802 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:00,837 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3058#(and (<= ~i~0 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:00,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-22 01:19:00,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:00,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-22 01:19:00,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-22 01:19:00,838 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 12 states. [2020-10-22 01:19:01,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:01,185 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-10-22 01:19:01,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-22 01:19:01,186 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-22 01:19:01,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:01,187 INFO L225 Difference]: With dead ends: 82 [2020-10-22 01:19:01,187 INFO L226 Difference]: Without dead ends: 73 [2020-10-22 01:19:01,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-22 01:19:01,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-22 01:19:01,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-10-22 01:19:01,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-22 01:19:01,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-22 01:19:01,192 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-10-22 01:19:01,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:01,192 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-22 01:19:01,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-22 01:19:01,192 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-22 01:19:01,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-22 01:19:01,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:01,193 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:01,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-22 01:19:01,404 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:01,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:01,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 14 times [2020-10-22 01:19:01,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:01,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3586434] [2020-10-22 01:19:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:01,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3586434] [2020-10-22 01:19:01,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523470786] [2020-10-22 01:19:01,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:19:01,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:19:01,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:01,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-22 01:19:01,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:01,590 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:01,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:01,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-22 01:19:01,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [975876762] [2020-10-22 01:19:01,620 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:01,622 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:01,624 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2020-10-22 01:19:01,624 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:01,673 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:01,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-22 01:19:01,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:01,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-22 01:19:01,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-22 01:19:01,674 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-10-22 01:19:01,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:01,976 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-10-22 01:19:01,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-22 01:19:01,976 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-22 01:19:01,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:01,977 INFO L225 Difference]: With dead ends: 72 [2020-10-22 01:19:01,977 INFO L226 Difference]: Without dead ends: 67 [2020-10-22 01:19:01,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2020-10-22 01:19:01,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-22 01:19:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-10-22 01:19:01,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-22 01:19:01,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-22 01:19:01,981 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-22 01:19:01,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:01,982 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-22 01:19:01,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-22 01:19:01,983 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-22 01:19:01,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-22 01:19:01,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:01,983 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:02,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-22 01:19:02,185 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:02,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:02,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 15 times [2020-10-22 01:19:02,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:02,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144693668] [2020-10-22 01:19:02,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:02,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144693668] [2020-10-22 01:19:02,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615721141] [2020-10-22 01:19:02,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:02,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-22 01:19:02,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:02,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-22 01:19:02,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:02,394 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:02,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:02,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-22 01:19:02,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [239043997] [2020-10-22 01:19:02,415 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:02,417 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:02,421 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 31 transitions. [2020-10-22 01:19:02,422 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:02,460 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:02,460 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:02,493 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:02,493 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:02,532 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3580#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-22 01:19:02,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-22 01:19:02,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:02,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-22 01:19:02,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-22 01:19:02,533 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 13 states. [2020-10-22 01:19:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:02,770 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-10-22 01:19:02,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-22 01:19:02,770 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-22 01:19:02,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:02,771 INFO L225 Difference]: With dead ends: 72 [2020-10-22 01:19:02,772 INFO L226 Difference]: Without dead ends: 66 [2020-10-22 01:19:02,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:19:02,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-22 01:19:02,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-10-22 01:19:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-22 01:19:02,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-22 01:19:02,775 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 16 [2020-10-22 01:19:02,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:02,776 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-22 01:19:02,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-22 01:19:02,776 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-22 01:19:02,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-22 01:19:02,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:02,776 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:02,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-22 01:19:02,987 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:02,987 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 16 times [2020-10-22 01:19:02,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:02,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605957426] [2020-10-22 01:19:02,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:03,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605957426] [2020-10-22 01:19:03,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115609631] [2020-10-22 01:19:03,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:03,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:19:03,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:03,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-22 01:19:03,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:03,194 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:03,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:03,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-22 01:19:03,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [493346231] [2020-10-22 01:19:03,206 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:03,207 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:03,209 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 24 transitions. [2020-10-22 01:19:03,210 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:03,228 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:03,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-22 01:19:03,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:03,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-22 01:19:03,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-22 01:19:03,230 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 12 states. [2020-10-22 01:19:03,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:03,591 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-22 01:19:03,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-22 01:19:03,592 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-22 01:19:03,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:03,593 INFO L225 Difference]: With dead ends: 84 [2020-10-22 01:19:03,593 INFO L226 Difference]: Without dead ends: 79 [2020-10-22 01:19:03,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-22 01:19:03,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-22 01:19:03,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2020-10-22 01:19:03,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-22 01:19:03,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 119 transitions. [2020-10-22 01:19:03,598 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 119 transitions. Word has length 16 [2020-10-22 01:19:03,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:03,598 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 119 transitions. [2020-10-22 01:19:03,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-22 01:19:03,598 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 119 transitions. [2020-10-22 01:19:03,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-22 01:19:03,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:03,599 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:03,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:03,810 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:03,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:03,810 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 17 times [2020-10-22 01:19:03,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:03,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514578601] [2020-10-22 01:19:03,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:03,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514578601] [2020-10-22 01:19:03,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28905915] [2020-10-22 01:19:03,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:03,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-22 01:19:03,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:03,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-22 01:19:03,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:03,967 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:03,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:03,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-22 01:19:03,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [72679158] [2020-10-22 01:19:03,984 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:03,985 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:03,988 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-10-22 01:19:03,988 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:04,045 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4125#(and (<= ~i~0 13) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:04,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-22 01:19:04,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:04,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-22 01:19:04,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-22 01:19:04,046 INFO L87 Difference]: Start difference. First operand 50 states and 119 transitions. Second operand 13 states. [2020-10-22 01:19:04,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:04,406 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-22 01:19:04,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-22 01:19:04,407 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-22 01:19:04,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:04,408 INFO L225 Difference]: With dead ends: 92 [2020-10-22 01:19:04,409 INFO L226 Difference]: Without dead ends: 83 [2020-10-22 01:19:04,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-22 01:19:04,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-22 01:19:04,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-22 01:19:04,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-22 01:19:04,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-22 01:19:04,413 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 16 [2020-10-22 01:19:04,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:04,413 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-22 01:19:04,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-22 01:19:04,413 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-22 01:19:04,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-22 01:19:04,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:04,414 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:04,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:04,625 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:04,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:04,626 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 18 times [2020-10-22 01:19:04,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:04,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559130323] [2020-10-22 01:19:04,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:04,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559130323] [2020-10-22 01:19:04,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495653266] [2020-10-22 01:19:04,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:04,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-22 01:19:04,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:04,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-22 01:19:04,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:04,809 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:04,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:04,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-22 01:19:04,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1096299371] [2020-10-22 01:19:04,822 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:04,823 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:04,826 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-10-22 01:19:04,826 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:04,861 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4430#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 11))] [2020-10-22 01:19:04,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-22 01:19:04,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:04,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-22 01:19:04,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-22 01:19:04,862 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 14 states. [2020-10-22 01:19:05,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:05,311 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-22 01:19:05,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-22 01:19:05,314 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-22 01:19:05,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:05,314 INFO L225 Difference]: With dead ends: 92 [2020-10-22 01:19:05,315 INFO L226 Difference]: Without dead ends: 83 [2020-10-22 01:19:05,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=770, Unknown=0, NotChecked=0, Total=1122 [2020-10-22 01:19:05,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-22 01:19:05,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-10-22 01:19:05,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-22 01:19:05,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-22 01:19:05,318 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-10-22 01:19:05,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:05,319 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-22 01:19:05,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-22 01:19:05,319 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-22 01:19:05,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-22 01:19:05,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:05,319 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:05,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:05,531 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:05,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:05,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 19 times [2020-10-22 01:19:05,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:05,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820723052] [2020-10-22 01:19:05,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:05,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820723052] [2020-10-22 01:19:05,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554182550] [2020-10-22 01:19:05,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:05,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-22 01:19:05,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:05,709 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:05,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:05,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-22 01:19:05,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1546626507] [2020-10-22 01:19:05,721 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:05,723 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:05,726 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2020-10-22 01:19:05,726 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:05,776 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:05,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-22 01:19:05,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:05,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-22 01:19:05,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-22 01:19:05,777 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-10-22 01:19:06,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:06,184 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-10-22 01:19:06,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-22 01:19:06,185 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-22 01:19:06,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:06,186 INFO L225 Difference]: With dead ends: 80 [2020-10-22 01:19:06,186 INFO L226 Difference]: Without dead ends: 75 [2020-10-22 01:19:06,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2020-10-22 01:19:06,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-22 01:19:06,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-10-22 01:19:06,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-22 01:19:06,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-22 01:19:06,191 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-22 01:19:06,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:06,192 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-22 01:19:06,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-22 01:19:06,192 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-22 01:19:06,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-22 01:19:06,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:06,193 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:06,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-22 01:19:06,396 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:06,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:06,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 20 times [2020-10-22 01:19:06,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:06,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835663278] [2020-10-22 01:19:06,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:06,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835663278] [2020-10-22 01:19:06,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371235785] [2020-10-22 01:19:06,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:06,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:19:06,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:06,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-22 01:19:06,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:06,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:06,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:06,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-22 01:19:06,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1318219769] [2020-10-22 01:19:06,621 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:06,623 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:06,626 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 33 transitions. [2020-10-22 01:19:06,626 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:06,655 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:06,656 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:06,691 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:06,692 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:06,720 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5022#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-22 01:19:06,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-22 01:19:06,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:06,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-22 01:19:06,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-22 01:19:06,722 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 15 states. [2020-10-22 01:19:07,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:07,016 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-22 01:19:07,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-22 01:19:07,017 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-22 01:19:07,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:07,018 INFO L225 Difference]: With dead ends: 80 [2020-10-22 01:19:07,018 INFO L226 Difference]: Without dead ends: 74 [2020-10-22 01:19:07,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=482, Unknown=0, NotChecked=0, Total=702 [2020-10-22 01:19:07,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-22 01:19:07,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2020-10-22 01:19:07,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-22 01:19:07,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-22 01:19:07,022 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 18 [2020-10-22 01:19:07,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:07,023 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-22 01:19:07,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-22 01:19:07,023 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-22 01:19:07,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-22 01:19:07,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:07,024 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:07,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-22 01:19:07,233 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:07,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:07,233 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 21 times [2020-10-22 01:19:07,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:07,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130403398] [2020-10-22 01:19:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:07,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:07,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130403398] [2020-10-22 01:19:07,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40160383] [2020-10-22 01:19:07,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:07,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-22 01:19:07,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:07,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-22 01:19:07,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:07,418 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:07,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:07,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-22 01:19:07,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1138583463] [2020-10-22 01:19:07,430 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:07,432 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:07,435 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 26 transitions. [2020-10-22 01:19:07,435 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:07,452 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:07,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-22 01:19:07,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:07,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-22 01:19:07,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-22 01:19:07,454 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 14 states. [2020-10-22 01:19:07,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:07,897 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-22 01:19:07,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-22 01:19:07,898 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-22 01:19:07,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:07,898 INFO L225 Difference]: With dead ends: 94 [2020-10-22 01:19:07,898 INFO L226 Difference]: Without dead ends: 89 [2020-10-22 01:19:07,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=404, Invalid=856, Unknown=0, NotChecked=0, Total=1260 [2020-10-22 01:19:07,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-22 01:19:07,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 54. [2020-10-22 01:19:07,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-22 01:19:07,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 129 transitions. [2020-10-22 01:19:07,902 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 129 transitions. Word has length 18 [2020-10-22 01:19:07,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:07,903 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 129 transitions. [2020-10-22 01:19:07,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-22 01:19:07,903 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 129 transitions. [2020-10-22 01:19:07,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-22 01:19:07,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:07,904 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:08,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-22 01:19:08,108 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:08,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:08,108 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 22 times [2020-10-22 01:19:08,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:08,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266083979] [2020-10-22 01:19:08,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:08,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266083979] [2020-10-22 01:19:08,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120567490] [2020-10-22 01:19:08,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:08,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:19:08,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:08,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-22 01:19:08,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:08,298 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:08,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:08,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-22 01:19:08,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1771061344] [2020-10-22 01:19:08,314 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:08,316 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:08,321 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-10-22 01:19:08,321 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:08,382 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5633#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 15))] [2020-10-22 01:19:08,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-22 01:19:08,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:08,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-22 01:19:08,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-22 01:19:08,383 INFO L87 Difference]: Start difference. First operand 54 states and 129 transitions. Second operand 15 states. [2020-10-22 01:19:08,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:08,869 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-10-22 01:19:08,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-22 01:19:08,870 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-22 01:19:08,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:08,871 INFO L225 Difference]: With dead ends: 102 [2020-10-22 01:19:08,872 INFO L226 Difference]: Without dead ends: 93 [2020-10-22 01:19:08,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2020-10-22 01:19:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-22 01:19:08,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-10-22 01:19:08,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-22 01:19:08,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-22 01:19:08,875 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 18 [2020-10-22 01:19:08,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:08,876 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-22 01:19:08,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-22 01:19:08,876 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-22 01:19:08,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-22 01:19:08,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:08,877 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:09,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-22 01:19:09,082 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:09,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:09,082 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 23 times [2020-10-22 01:19:09,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:09,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411048940] [2020-10-22 01:19:09,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:09,185 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:09,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411048940] [2020-10-22 01:19:09,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186017662] [2020-10-22 01:19:09,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:09,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-22 01:19:09,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:09,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-22 01:19:09,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:09,267 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:09,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:09,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-22 01:19:09,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1299551409] [2020-10-22 01:19:09,280 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:09,282 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:09,287 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-10-22 01:19:09,287 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:09,326 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5976#(and (<= ~i~0 13) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:09,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-22 01:19:09,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:09,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-22 01:19:09,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-22 01:19:09,327 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 16 states. [2020-10-22 01:19:09,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:09,870 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-10-22 01:19:09,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-22 01:19:09,871 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-22 01:19:09,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:09,871 INFO L225 Difference]: With dead ends: 102 [2020-10-22 01:19:09,872 INFO L226 Difference]: Without dead ends: 93 [2020-10-22 01:19:09,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=488, Invalid=1072, Unknown=0, NotChecked=0, Total=1560 [2020-10-22 01:19:09,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-22 01:19:09,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-10-22 01:19:09,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-22 01:19:09,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-10-22 01:19:09,875 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 19 [2020-10-22 01:19:09,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:09,875 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-10-22 01:19:09,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-22 01:19:09,875 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-10-22 01:19:09,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-22 01:19:09,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:09,876 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:10,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-22 01:19:10,084 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:10,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:10,084 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 24 times [2020-10-22 01:19:10,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:10,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256317820] [2020-10-22 01:19:10,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:10,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256317820] [2020-10-22 01:19:10,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818322552] [2020-10-22 01:19:10,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:10,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-22 01:19:10,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:10,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-22 01:19:10,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:10,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:10,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:10,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-22 01:19:10,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [289678042] [2020-10-22 01:19:10,354 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:10,356 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:10,359 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2020-10-22 01:19:10,359 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:10,405 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:10,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-22 01:19:10,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:10,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-22 01:19:10,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-22 01:19:10,406 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-10-22 01:19:10,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:10,961 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-10-22 01:19:10,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-22 01:19:10,962 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-22 01:19:10,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:10,963 INFO L225 Difference]: With dead ends: 88 [2020-10-22 01:19:10,963 INFO L226 Difference]: Without dead ends: 83 [2020-10-22 01:19:10,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=418, Invalid=914, Unknown=0, NotChecked=0, Total=1332 [2020-10-22 01:19:10,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-22 01:19:10,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-10-22 01:19:10,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-22 01:19:10,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-22 01:19:10,967 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-22 01:19:10,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:10,967 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-22 01:19:10,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-22 01:19:10,968 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-22 01:19:10,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-22 01:19:10,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:10,968 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:11,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:11,172 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:11,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:11,172 INFO L82 PathProgramCache]: Analyzing trace with hash -923845315, now seen corresponding path program 25 times [2020-10-22 01:19:11,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:11,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990746521] [2020-10-22 01:19:11,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:11,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990746521] [2020-10-22 01:19:11,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544794959] [2020-10-22 01:19:11,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:11,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-22 01:19:11,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:11,387 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:11,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:11,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-22 01:19:11,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1412415222] [2020-10-22 01:19:11,403 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:11,404 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:11,410 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2020-10-22 01:19:11,410 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:11,413 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:11,414 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:11,468 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:11,469 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:11,490 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:11,492 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:11,499 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6638#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-22 01:19:11,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-22 01:19:11,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:11,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-22 01:19:11,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-22 01:19:11,500 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 17 states. [2020-10-22 01:19:11,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:11,836 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-10-22 01:19:11,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-22 01:19:11,837 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-22 01:19:11,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:11,838 INFO L225 Difference]: With dead ends: 88 [2020-10-22 01:19:11,838 INFO L226 Difference]: Without dead ends: 82 [2020-10-22 01:19:11,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2020-10-22 01:19:11,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-22 01:19:11,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2020-10-22 01:19:11,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-22 01:19:11,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-22 01:19:11,841 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 20 [2020-10-22 01:19:11,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:11,842 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-22 01:19:11,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-22 01:19:11,842 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-22 01:19:11,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-22 01:19:11,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:11,843 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:12,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-22 01:19:12,054 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:12,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:12,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1384142351, now seen corresponding path program 26 times [2020-10-22 01:19:12,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:12,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470881462] [2020-10-22 01:19:12,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:12,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470881462] [2020-10-22 01:19:12,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030109128] [2020-10-22 01:19:12,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:12,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:19:12,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:12,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-22 01:19:12,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:12,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:12,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:12,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-22 01:19:12,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [821149653] [2020-10-22 01:19:12,307 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:12,309 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:12,312 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 28 transitions. [2020-10-22 01:19:12,312 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:12,328 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:12,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-22 01:19:12,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:12,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-22 01:19:12,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-22 01:19:12,330 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 16 states. [2020-10-22 01:19:12,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:12,925 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-22 01:19:12,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-22 01:19:12,926 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-22 01:19:12,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:12,927 INFO L225 Difference]: With dead ends: 104 [2020-10-22 01:19:12,928 INFO L226 Difference]: Without dead ends: 99 [2020-10-22 01:19:12,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=549, Invalid=1173, Unknown=0, NotChecked=0, Total=1722 [2020-10-22 01:19:12,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-22 01:19:12,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 58. [2020-10-22 01:19:12,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-22 01:19:12,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 139 transitions. [2020-10-22 01:19:12,932 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 139 transitions. Word has length 20 [2020-10-22 01:19:12,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:12,932 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 139 transitions. [2020-10-22 01:19:12,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-22 01:19:12,933 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 139 transitions. [2020-10-22 01:19:12,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-22 01:19:12,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:12,933 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:13,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:13,146 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:13,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:13,146 INFO L82 PathProgramCache]: Analyzing trace with hash -215934529, now seen corresponding path program 27 times [2020-10-22 01:19:13,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:13,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126483016] [2020-10-22 01:19:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:13,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126483016] [2020-10-22 01:19:13,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227053098] [2020-10-22 01:19:13,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:13,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-22 01:19:13,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:13,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-22 01:19:13,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:13,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:13,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-22 01:19:13,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1631672074] [2020-10-22 01:19:13,375 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:13,377 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:13,382 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-10-22 01:19:13,382 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:13,450 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7315#(and (<= ~i~0 17) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:13,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-22 01:19:13,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:13,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-22 01:19:13,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-10-22 01:19:13,452 INFO L87 Difference]: Start difference. First operand 58 states and 139 transitions. Second operand 17 states. [2020-10-22 01:19:14,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:14,049 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-10-22 01:19:14,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-22 01:19:14,050 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-22 01:19:14,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:14,051 INFO L225 Difference]: With dead ends: 112 [2020-10-22 01:19:14,051 INFO L226 Difference]: Without dead ends: 103 [2020-10-22 01:19:14,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=502, Invalid=1138, Unknown=0, NotChecked=0, Total=1640 [2020-10-22 01:19:14,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-22 01:19:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 72. [2020-10-22 01:19:14,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-22 01:19:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-22 01:19:14,056 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 20 [2020-10-22 01:19:14,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:14,056 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-22 01:19:14,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-22 01:19:14,056 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-22 01:19:14,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-22 01:19:14,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:14,057 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:14,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-22 01:19:14,268 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:14,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:14,268 INFO L82 PathProgramCache]: Analyzing trace with hash -41234864, now seen corresponding path program 28 times [2020-10-22 01:19:14,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:14,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139951560] [2020-10-22 01:19:14,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:14,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139951560] [2020-10-22 01:19:14,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135681181] [2020-10-22 01:19:14,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:14,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:19:14,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:14,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-22 01:19:14,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:14,510 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:14,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:14,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-22 01:19:14,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [163245450] [2020-10-22 01:19:14,523 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:14,525 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:14,529 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-22 01:19:14,529 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:14,569 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7696#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 15))] [2020-10-22 01:19:14,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-22 01:19:14,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:14,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-22 01:19:14,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-10-22 01:19:14,570 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 18 states. [2020-10-22 01:19:15,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:15,299 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-10-22 01:19:15,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-22 01:19:15,299 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-22 01:19:15,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:15,300 INFO L225 Difference]: With dead ends: 112 [2020-10-22 01:19:15,300 INFO L226 Difference]: Without dead ends: 103 [2020-10-22 01:19:15,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=646, Invalid=1424, Unknown=0, NotChecked=0, Total=2070 [2020-10-22 01:19:15,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-22 01:19:15,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-10-22 01:19:15,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-22 01:19:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-10-22 01:19:15,305 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 21 [2020-10-22 01:19:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:15,305 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-10-22 01:19:15,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-22 01:19:15,306 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-10-22 01:19:15,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-22 01:19:15,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:15,307 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:15,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:15,517 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:15,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:15,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1895992291, now seen corresponding path program 29 times [2020-10-22 01:19:15,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:15,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669463069] [2020-10-22 01:19:15,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:15,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669463069] [2020-10-22 01:19:15,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098183704] [2020-10-22 01:19:15,638 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:15,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-22 01:19:15,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:15,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-22 01:19:15,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:15,776 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:15,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:15,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-22 01:19:15,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [859923431] [2020-10-22 01:19:15,791 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:15,794 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:15,804 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 33 transitions. [2020-10-22 01:19:15,804 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:15,873 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:15,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-22 01:19:15,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:15,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-22 01:19:15,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-22 01:19:15,874 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 17 states. [2020-10-22 01:19:16,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:16,619 INFO L93 Difference]: Finished difference Result 96 states and 233 transitions. [2020-10-22 01:19:16,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-22 01:19:16,619 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-22 01:19:16,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:16,620 INFO L225 Difference]: With dead ends: 96 [2020-10-22 01:19:16,620 INFO L226 Difference]: Without dead ends: 91 [2020-10-22 01:19:16,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=564, Invalid=1242, Unknown=0, NotChecked=0, Total=1806 [2020-10-22 01:19:16,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-22 01:19:16,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-10-22 01:19:16,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-22 01:19:16,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-22 01:19:16,625 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-22 01:19:16,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:16,625 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-22 01:19:16,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-22 01:19:16,625 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-22 01:19:16,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-22 01:19:16,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:16,626 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:16,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-22 01:19:16,838 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:16,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:16,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1242888800, now seen corresponding path program 30 times [2020-10-22 01:19:16,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:16,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303202898] [2020-10-22 01:19:16,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:17,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303202898] [2020-10-22 01:19:17,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920973462] [2020-10-22 01:19:17,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:17,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-22 01:19:17,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:17,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-22 01:19:17,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:17,122 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:17,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:17,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-22 01:19:17,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1898583684] [2020-10-22 01:19:17,143 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:17,145 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:17,150 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 37 transitions. [2020-10-22 01:19:17,150 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:17,154 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:17,154 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:17,250 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8428#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-22 01:19:17,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-22 01:19:17,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:17,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-22 01:19:17,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-22 01:19:17,252 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 19 states. [2020-10-22 01:19:17,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:17,649 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-22 01:19:17,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-22 01:19:17,650 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-22 01:19:17,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:17,651 INFO L225 Difference]: With dead ends: 96 [2020-10-22 01:19:17,651 INFO L226 Difference]: Without dead ends: 90 [2020-10-22 01:19:17,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2020-10-22 01:19:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-22 01:19:17,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-10-22 01:19:17,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-22 01:19:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-22 01:19:17,655 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 22 [2020-10-22 01:19:17,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:17,655 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-22 01:19:17,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-22 01:19:17,655 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-22 01:19:17,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-22 01:19:17,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:17,656 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:17,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:17,865 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:17,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:17,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1278252686, now seen corresponding path program 31 times [2020-10-22 01:19:17,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:17,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528665826] [2020-10-22 01:19:17,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:18,013 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:18,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528665826] [2020-10-22 01:19:18,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321182514] [2020-10-22 01:19:18,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:19:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:18,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-22 01:19:18,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:18,111 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:18,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:18,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-22 01:19:18,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1652121026] [2020-10-22 01:19:18,130 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:18,132 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:18,137 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 30 transitions. [2020-10-22 01:19:18,137 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:18,156 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:18,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-22 01:19:18,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:18,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-22 01:19:18,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-22 01:19:18,158 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 18 states. [2020-10-22 01:19:18,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:18,934 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-22 01:19:18,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-22 01:19:18,935 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-22 01:19:18,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:18,936 INFO L225 Difference]: With dead ends: 114 [2020-10-22 01:19:18,936 INFO L226 Difference]: Without dead ends: 109 [2020-10-22 01:19:18,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=716, Invalid=1540, Unknown=0, NotChecked=0, Total=2256 [2020-10-22 01:19:18,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-22 01:19:18,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 62. [2020-10-22 01:19:18,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-22 01:19:18,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 149 transitions. [2020-10-22 01:19:18,941 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 149 transitions. Word has length 22 [2020-10-22 01:19:18,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:18,941 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 149 transitions. [2020-10-22 01:19:18,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-22 01:19:18,942 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 149 transitions. [2020-10-22 01:19:18,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-22 01:19:18,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:18,942 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:19,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-22 01:19:19,143 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:19,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:19,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1353755908, now seen corresponding path program 32 times [2020-10-22 01:19:19,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:19,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536298058] [2020-10-22 01:19:19,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:19,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536298058] [2020-10-22 01:19:19,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897341971] [2020-10-22 01:19:19,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:19,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:19:19,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:19,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-22 01:19:19,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:19,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:19,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-22 01:19:19,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [332461528] [2020-10-22 01:19:19,400 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:19,403 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:19,408 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-22 01:19:19,408 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:19,487 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9171#(and (<= ~i~0 19) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:19,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-22 01:19:19,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:19,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-22 01:19:19,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-10-22 01:19:19,488 INFO L87 Difference]: Start difference. First operand 62 states and 149 transitions. Second operand 19 states. [2020-10-22 01:19:20,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:20,237 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-10-22 01:19:20,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-22 01:19:20,238 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-22 01:19:20,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:20,239 INFO L225 Difference]: With dead ends: 122 [2020-10-22 01:19:20,239 INFO L226 Difference]: Without dead ends: 113 [2020-10-22 01:19:20,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=661, Invalid=1501, Unknown=0, NotChecked=0, Total=2162 [2020-10-22 01:19:20,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-22 01:19:20,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2020-10-22 01:19:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-22 01:19:20,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-22 01:19:20,243 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 22 [2020-10-22 01:19:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:20,243 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-22 01:19:20,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-22 01:19:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-22 01:19:20,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-22 01:19:20,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:20,244 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:20,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:20,445 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:20,445 INFO L82 PathProgramCache]: Analyzing trace with hash -971102387, now seen corresponding path program 33 times [2020-10-22 01:19:20,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:20,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614408090] [2020-10-22 01:19:20,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:20,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614408090] [2020-10-22 01:19:20,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174875230] [2020-10-22 01:19:20,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:20,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-22 01:19:20,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:20,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-22 01:19:20,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:20,708 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:20,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:20,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-22 01:19:20,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [248925966] [2020-10-22 01:19:20,721 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:20,723 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:20,727 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-22 01:19:20,727 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:20,771 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9590#(and (<= ~i~0 17) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:20,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-22 01:19:20,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:20,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-22 01:19:20,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-10-22 01:19:20,772 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 20 states. [2020-10-22 01:19:21,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:21,619 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-10-22 01:19:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-22 01:19:21,620 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-22 01:19:21,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:21,621 INFO L225 Difference]: With dead ends: 122 [2020-10-22 01:19:21,621 INFO L226 Difference]: Without dead ends: 113 [2020-10-22 01:19:21,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=826, Invalid=1826, Unknown=0, NotChecked=0, Total=2652 [2020-10-22 01:19:21,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-22 01:19:21,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2020-10-22 01:19:21,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-22 01:19:21,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-10-22 01:19:21,624 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 23 [2020-10-22 01:19:21,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:21,625 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-10-22 01:19:21,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-22 01:19:21,625 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-10-22 01:19:21,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-22 01:19:21,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:21,625 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:21,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-22 01:19:21,826 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:21,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:21,827 INFO L82 PathProgramCache]: Analyzing trace with hash 983267910, now seen corresponding path program 34 times [2020-10-22 01:19:21,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:21,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669287995] [2020-10-22 01:19:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:21,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669287995] [2020-10-22 01:19:21,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829398449] [2020-10-22 01:19:21,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:22,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:19:22,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:22,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-22 01:19:22,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:22,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:22,091 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:22,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:22,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-22 01:19:22,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [429493468] [2020-10-22 01:19:22,093 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:22,095 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:22,100 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 35 transitions. [2020-10-22 01:19:22,100 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:22,161 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:22,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-22 01:19:22,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:22,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-22 01:19:22,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-22 01:19:22,162 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 19 states. [2020-10-22 01:19:22,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:22,979 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-10-22 01:19:22,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-22 01:19:22,980 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-22 01:19:22,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:22,981 INFO L225 Difference]: With dead ends: 104 [2020-10-22 01:19:22,981 INFO L226 Difference]: Without dead ends: 99 [2020-10-22 01:19:22,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=732, Invalid=1620, Unknown=0, NotChecked=0, Total=2352 [2020-10-22 01:19:22,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-22 01:19:22,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-10-22 01:19:22,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-22 01:19:22,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-22 01:19:22,986 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-22 01:19:22,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:22,986 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-22 01:19:22,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-22 01:19:22,986 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-22 01:19:22,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-22 01:19:22,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:22,987 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:23,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-22 01:19:23,198 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:23,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:23,199 INFO L82 PathProgramCache]: Analyzing trace with hash 415234755, now seen corresponding path program 35 times [2020-10-22 01:19:23,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:23,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453080404] [2020-10-22 01:19:23,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:23,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453080404] [2020-10-22 01:19:23,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874329976] [2020-10-22 01:19:23,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:23,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-22 01:19:23,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:23,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-22 01:19:23,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:23,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:23,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:23,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-22 01:19:23,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [490296903] [2020-10-22 01:19:23,537 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:23,540 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:23,546 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 39 transitions. [2020-10-22 01:19:23,546 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:23,550 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:23,550 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:23,619 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:23,619 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:23,655 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10392#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-22 01:19:23,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-22 01:19:23,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:23,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-22 01:19:23,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-22 01:19:23,657 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 21 states. [2020-10-22 01:19:24,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:24,101 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-10-22 01:19:24,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-22 01:19:24,102 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-22 01:19:24,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:24,103 INFO L225 Difference]: With dead ends: 104 [2020-10-22 01:19:24,103 INFO L226 Difference]: Without dead ends: 98 [2020-10-22 01:19:24,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=460, Invalid=1022, Unknown=0, NotChecked=0, Total=1482 [2020-10-22 01:19:24,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-22 01:19:24,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-22 01:19:24,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-22 01:19:24,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-22 01:19:24,108 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 24 [2020-10-22 01:19:24,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:24,109 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-22 01:19:24,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-22 01:19:24,109 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-22 01:19:24,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-22 01:19:24,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:24,110 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:24,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-22 01:19:24,321 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:24,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:24,321 INFO L82 PathProgramCache]: Analyzing trace with hash -39374827, now seen corresponding path program 36 times [2020-10-22 01:19:24,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:24,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674712943] [2020-10-22 01:19:24,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:24,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674712943] [2020-10-22 01:19:24,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418089531] [2020-10-22 01:19:24,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:24,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-22 01:19:24,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:24,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-22 01:19:24,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:24,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:24,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:24,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-22 01:19:24,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [879712875] [2020-10-22 01:19:24,606 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:24,608 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:24,612 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 32 transitions. [2020-10-22 01:19:24,613 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:24,630 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:24,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-22 01:19:24,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:24,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-22 01:19:24,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-22 01:19:24,632 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 20 states. [2020-10-22 01:19:25,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:25,543 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-22 01:19:25,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-22 01:19:25,543 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-22 01:19:25,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:25,545 INFO L225 Difference]: With dead ends: 124 [2020-10-22 01:19:25,545 INFO L226 Difference]: Without dead ends: 119 [2020-10-22 01:19:25,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=905, Invalid=1957, Unknown=0, NotChecked=0, Total=2862 [2020-10-22 01:19:25,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-22 01:19:25,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 66. [2020-10-22 01:19:25,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-22 01:19:25,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 159 transitions. [2020-10-22 01:19:25,549 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 159 transitions. Word has length 24 [2020-10-22 01:19:25,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:25,550 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 159 transitions. [2020-10-22 01:19:25,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-22 01:19:25,550 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 159 transitions. [2020-10-22 01:19:25,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-22 01:19:25,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:25,551 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:25,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-22 01:19:25,759 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:25,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:25,760 INFO L82 PathProgramCache]: Analyzing trace with hash 416559353, now seen corresponding path program 37 times [2020-10-22 01:19:25,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:25,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046825192] [2020-10-22 01:19:25,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:25,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046825192] [2020-10-22 01:19:25,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183077979] [2020-10-22 01:19:25,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:26,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-22 01:19:26,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:26,040 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:26,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:26,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-22 01:19:26,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1026301035] [2020-10-22 01:19:26,055 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:26,057 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:26,063 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-22 01:19:26,063 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:26,129 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11201#(and (<= ~i~0 21) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:26,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-22 01:19:26,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:26,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-22 01:19:26,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2020-10-22 01:19:26,130 INFO L87 Difference]: Start difference. First operand 66 states and 159 transitions. Second operand 21 states. [2020-10-22 01:19:27,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:27,085 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-10-22 01:19:27,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-22 01:19:27,086 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-22 01:19:27,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:27,087 INFO L225 Difference]: With dead ends: 132 [2020-10-22 01:19:27,087 INFO L226 Difference]: Without dead ends: 123 [2020-10-22 01:19:27,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=842, Invalid=1914, Unknown=0, NotChecked=0, Total=2756 [2020-10-22 01:19:27,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-22 01:19:27,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 84. [2020-10-22 01:19:27,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-22 01:19:27,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-22 01:19:27,092 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 24 [2020-10-22 01:19:27,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:27,092 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-22 01:19:27,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-22 01:19:27,093 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-22 01:19:27,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-22 01:19:27,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:27,093 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:27,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-22 01:19:27,306 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:27,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:27,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1220594422, now seen corresponding path program 38 times [2020-10-22 01:19:27,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:27,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382513575] [2020-10-22 01:19:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:27,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382513575] [2020-10-22 01:19:27,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752118265] [2020-10-22 01:19:27,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:27,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:19:27,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:27,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-22 01:19:27,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:27,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:27,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:27,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-22 01:19:27,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1676304360] [2020-10-22 01:19:27,582 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:27,584 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:27,588 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-22 01:19:27,589 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:27,627 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11658#(and (<= ~i~0 19) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:27,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-22 01:19:27,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:27,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-22 01:19:27,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:19:27,628 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 22 states. [2020-10-22 01:19:28,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:28,697 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-10-22 01:19:28,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-22 01:19:28,698 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-22 01:19:28,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:28,698 INFO L225 Difference]: With dead ends: 132 [2020-10-22 01:19:28,698 INFO L226 Difference]: Without dead ends: 123 [2020-10-22 01:19:28,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1028, Invalid=2278, Unknown=0, NotChecked=0, Total=3306 [2020-10-22 01:19:28,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-22 01:19:28,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 65. [2020-10-22 01:19:28,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-22 01:19:28,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-10-22 01:19:28,702 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 25 [2020-10-22 01:19:28,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:28,702 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-10-22 01:19:28,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-22 01:19:28,703 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-10-22 01:19:28,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-22 01:19:28,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:28,703 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:28,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-22 01:19:28,913 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:28,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:28,913 INFO L82 PathProgramCache]: Analyzing trace with hash 28466153, now seen corresponding path program 39 times [2020-10-22 01:19:28,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:28,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380460397] [2020-10-22 01:19:28,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:29,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380460397] [2020-10-22 01:19:29,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841394127] [2020-10-22 01:19:29,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:29,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-22 01:19:29,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:29,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-22 01:19:29,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:29,207 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:29,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:29,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-22 01:19:29,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1973224899] [2020-10-22 01:19:29,228 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:29,231 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:29,237 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 37 transitions. [2020-10-22 01:19:29,238 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:29,289 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:29,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-22 01:19:29,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:29,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-22 01:19:29,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-22 01:19:29,290 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 21 states. [2020-10-22 01:19:30,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:30,317 INFO L93 Difference]: Finished difference Result 112 states and 273 transitions. [2020-10-22 01:19:30,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-22 01:19:30,318 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-22 01:19:30,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:30,319 INFO L225 Difference]: With dead ends: 112 [2020-10-22 01:19:30,319 INFO L226 Difference]: Without dead ends: 107 [2020-10-22 01:19:30,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=922, Invalid=2048, Unknown=0, NotChecked=0, Total=2970 [2020-10-22 01:19:30,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-22 01:19:30,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-10-22 01:19:30,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-22 01:19:30,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-22 01:19:30,326 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-22 01:19:30,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:30,326 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-22 01:19:30,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-22 01:19:30,327 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-22 01:19:30,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-22 01:19:30,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:30,327 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:30,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-22 01:19:30,538 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:30,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:30,538 INFO L82 PathProgramCache]: Analyzing trace with hash -391352730, now seen corresponding path program 40 times [2020-10-22 01:19:30,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:30,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518877816] [2020-10-22 01:19:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:30,839 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:30,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518877816] [2020-10-22 01:19:30,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740109768] [2020-10-22 01:19:30,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:30,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:19:30,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:30,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-22 01:19:30,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:30,902 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:30,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:30,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-22 01:19:30,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1463041745] [2020-10-22 01:19:30,915 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:30,918 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:30,925 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 41 transitions. [2020-10-22 01:19:30,925 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:30,974 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:30,974 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:31,009 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:31,010 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:31,027 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:31,027 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:31,043 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12530#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-22 01:19:31,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-22 01:19:31,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:31,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-22 01:19:31,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:19:31,044 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 23 states. [2020-10-22 01:19:31,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:31,596 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-22 01:19:31,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-22 01:19:31,596 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-22 01:19:31,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:31,598 INFO L225 Difference]: With dead ends: 112 [2020-10-22 01:19:31,598 INFO L226 Difference]: Without dead ends: 106 [2020-10-22 01:19:31,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=560, Invalid=1246, Unknown=0, NotChecked=0, Total=1806 [2020-10-22 01:19:31,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-22 01:19:31,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2020-10-22 01:19:31,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-22 01:19:31,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-10-22 01:19:31,602 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 26 [2020-10-22 01:19:31,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:31,602 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-10-22 01:19:31,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-22 01:19:31,603 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-10-22 01:19:31,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-22 01:19:31,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:31,603 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:31,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:31,804 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:31,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:31,804 INFO L82 PathProgramCache]: Analyzing trace with hash 816306680, now seen corresponding path program 41 times [2020-10-22 01:19:31,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:31,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439987125] [2020-10-22 01:19:31,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:32,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439987125] [2020-10-22 01:19:32,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874068683] [2020-10-22 01:19:32,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:32,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-22 01:19:32,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:32,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-22 01:19:32,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:32,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:32,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:32,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-22 01:19:32,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1686149314] [2020-10-22 01:19:32,144 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:32,148 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:32,154 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 34 transitions. [2020-10-22 01:19:32,155 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:32,176 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:32,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-22 01:19:32,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:32,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-22 01:19:32,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:19:32,177 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 22 states. [2020-10-22 01:19:33,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:33,271 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-22 01:19:33,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-22 01:19:33,272 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-22 01:19:33,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:33,273 INFO L225 Difference]: With dead ends: 134 [2020-10-22 01:19:33,273 INFO L226 Difference]: Without dead ends: 129 [2020-10-22 01:19:33,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1116, Invalid=2424, Unknown=0, NotChecked=0, Total=3540 [2020-10-22 01:19:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-22 01:19:33,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 70. [2020-10-22 01:19:33,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-22 01:19:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 169 transitions. [2020-10-22 01:19:33,278 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 169 transitions. Word has length 26 [2020-10-22 01:19:33,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:33,279 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 169 transitions. [2020-10-22 01:19:33,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-22 01:19:33,279 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 169 transitions. [2020-10-22 01:19:33,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-22 01:19:33,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:33,280 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:33,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:33,483 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:33,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:33,483 INFO L82 PathProgramCache]: Analyzing trace with hash 882475958, now seen corresponding path program 42 times [2020-10-22 01:19:33,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:33,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467584802] [2020-10-22 01:19:33,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:33,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467584802] [2020-10-22 01:19:33,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075909946] [2020-10-22 01:19:33,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:19:33,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-22 01:19:33,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:33,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-22 01:19:33,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:33,807 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:33,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:33,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-22 01:19:33,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [670985381] [2020-10-22 01:19:33,822 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:33,825 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:33,830 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-22 01:19:33,830 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:33,908 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13405#(and (<= ~i~0 23) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:33,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-22 01:19:33,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:33,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-22 01:19:33,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-10-22 01:19:33,910 INFO L87 Difference]: Start difference. First operand 70 states and 169 transitions. Second operand 23 states. [2020-10-22 01:19:35,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:35,055 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-10-22 01:19:35,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-22 01:19:35,056 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-22 01:19:35,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:35,058 INFO L225 Difference]: With dead ends: 142 [2020-10-22 01:19:35,058 INFO L226 Difference]: Without dead ends: 133 [2020-10-22 01:19:35,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1045, Invalid=2377, Unknown=0, NotChecked=0, Total=3422 [2020-10-22 01:19:35,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-22 01:19:35,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 90. [2020-10-22 01:19:35,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-22 01:19:35,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 229 transitions. [2020-10-22 01:19:35,066 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 229 transitions. Word has length 26 [2020-10-22 01:19:35,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:35,066 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 229 transitions. [2020-10-22 01:19:35,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-22 01:19:35,066 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 229 transitions. [2020-10-22 01:19:35,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-22 01:19:35,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:35,067 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:35,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:35,280 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:35,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:35,281 INFO L82 PathProgramCache]: Analyzing trace with hash -464271481, now seen corresponding path program 43 times [2020-10-22 01:19:35,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:35,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287044080] [2020-10-22 01:19:35,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:35,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287044080] [2020-10-22 01:19:35,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975845953] [2020-10-22 01:19:35,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:19:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:35,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-22 01:19:35,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:35,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:35,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:35,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-22 01:19:35,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2110679447] [2020-10-22 01:19:35,628 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:35,633 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:35,639 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-22 01:19:35,640 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:35,684 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13900#(and (<= ~i~0 21) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:35,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-22 01:19:35,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:35,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-22 01:19:35,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-10-22 01:19:35,685 INFO L87 Difference]: Start difference. First operand 90 states and 229 transitions. Second operand 24 states. [2020-10-22 01:19:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:36,899 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-10-22 01:19:36,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-22 01:19:36,900 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-22 01:19:36,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:36,901 INFO L225 Difference]: With dead ends: 142 [2020-10-22 01:19:36,901 INFO L226 Difference]: Without dead ends: 133 [2020-10-22 01:19:36,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1252, Invalid=2780, Unknown=0, NotChecked=0, Total=4032 [2020-10-22 01:19:36,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-22 01:19:36,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 69. [2020-10-22 01:19:36,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-22 01:19:36,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-10-22 01:19:36,905 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 27 [2020-10-22 01:19:36,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:36,905 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-10-22 01:19:36,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-22 01:19:36,906 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-10-22 01:19:36,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-22 01:19:36,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:36,906 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:37,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-22 01:19:37,117 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:37,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:37,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1586979020, now seen corresponding path program 44 times [2020-10-22 01:19:37,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:37,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216723600] [2020-10-22 01:19:37,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:37,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216723600] [2020-10-22 01:19:37,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966898527] [2020-10-22 01:19:37,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:19:37,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:19:37,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:37,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-22 01:19:37,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:37,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:37,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:37,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-22 01:19:37,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1215291939] [2020-10-22 01:19:37,453 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:37,456 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:37,461 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 39 transitions. [2020-10-22 01:19:37,462 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:37,508 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:37,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-22 01:19:37,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:37,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-22 01:19:37,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-22 01:19:37,509 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 23 states. [2020-10-22 01:19:38,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:38,719 INFO L93 Difference]: Finished difference Result 120 states and 293 transitions. [2020-10-22 01:19:38,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-22 01:19:38,720 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-22 01:19:38,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:38,722 INFO L225 Difference]: With dead ends: 120 [2020-10-22 01:19:38,722 INFO L226 Difference]: Without dead ends: 115 [2020-10-22 01:19:38,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1134, Invalid=2526, Unknown=0, NotChecked=0, Total=3660 [2020-10-22 01:19:38,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-22 01:19:38,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-10-22 01:19:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-22 01:19:38,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-22 01:19:38,726 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-22 01:19:38,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:38,726 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-22 01:19:38,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-22 01:19:38,727 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-22 01:19:38,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-22 01:19:38,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:38,727 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:38,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:38,935 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:38,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:38,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1867154761, now seen corresponding path program 45 times [2020-10-22 01:19:38,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:38,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548959146] [2020-10-22 01:19:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:39,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548959146] [2020-10-22 01:19:39,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142395549] [2020-10-22 01:19:39,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:19:39,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-22 01:19:39,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:39,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-22 01:19:39,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:39,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:39,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:39,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-22 01:19:39,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [217981522] [2020-10-22 01:19:39,379 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:39,381 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:39,387 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 43 transitions. [2020-10-22 01:19:39,388 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:39,422 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:39,423 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:39,498 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14842#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-22 01:19:39,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-22 01:19:39,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:39,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-22 01:19:39,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-10-22 01:19:39,500 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 25 states. [2020-10-22 01:19:40,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:40,142 INFO L93 Difference]: Finished difference Result 120 states and 291 transitions. [2020-10-22 01:19:40,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-22 01:19:40,143 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-22 01:19:40,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:40,144 INFO L225 Difference]: With dead ends: 120 [2020-10-22 01:19:40,145 INFO L226 Difference]: Without dead ends: 114 [2020-10-22 01:19:40,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=670, Invalid=1492, Unknown=0, NotChecked=0, Total=2162 [2020-10-22 01:19:40,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-22 01:19:40,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 95. [2020-10-22 01:19:40,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-22 01:19:40,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 241 transitions. [2020-10-22 01:19:40,148 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 241 transitions. Word has length 28 [2020-10-22 01:19:40,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:40,148 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 241 transitions. [2020-10-22 01:19:40,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-22 01:19:40,148 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 241 transitions. [2020-10-22 01:19:40,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-22 01:19:40,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:40,148 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:40,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:40,349 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:40,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:40,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1507485925, now seen corresponding path program 46 times [2020-10-22 01:19:40,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:40,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125444825] [2020-10-22 01:19:40,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:40,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125444825] [2020-10-22 01:19:40,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705050721] [2020-10-22 01:19:40,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:19:40,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:19:40,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:40,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-22 01:19:40,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:40,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:40,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:40,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-22 01:19:40,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1600365605] [2020-10-22 01:19:40,717 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:40,720 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:40,726 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 36 transitions. [2020-10-22 01:19:40,726 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:40,743 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:40,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-22 01:19:40,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:40,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-22 01:19:40,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-22 01:19:40,744 INFO L87 Difference]: Start difference. First operand 95 states and 241 transitions. Second operand 24 states. [2020-10-22 01:19:42,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:42,036 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-10-22 01:19:42,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-22 01:19:42,037 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-22 01:19:42,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:42,038 INFO L225 Difference]: With dead ends: 144 [2020-10-22 01:19:42,038 INFO L226 Difference]: Without dead ends: 139 [2020-10-22 01:19:42,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1349, Invalid=2941, Unknown=0, NotChecked=0, Total=4290 [2020-10-22 01:19:42,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-22 01:19:42,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 74. [2020-10-22 01:19:42,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-22 01:19:42,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-22 01:19:42,041 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 28 [2020-10-22 01:19:42,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:42,041 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-22 01:19:42,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-22 01:19:42,041 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-22 01:19:42,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-22 01:19:42,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:42,041 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:42,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-22 01:19:42,242 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:42,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:42,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1951734579, now seen corresponding path program 47 times [2020-10-22 01:19:42,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:42,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994575258] [2020-10-22 01:19:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:42,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994575258] [2020-10-22 01:19:42,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775653875] [2020-10-22 01:19:42,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:19:42,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-22 01:19:42,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:42,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-22 01:19:42,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:42,645 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:42,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:42,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-22 01:19:42,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1856014228] [2020-10-22 01:19:42,672 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:42,676 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:42,688 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-22 01:19:42,688 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:42,806 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15783#(and (<= ~i~0 25) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:42,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-22 01:19:42,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:42,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-22 01:19:42,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-10-22 01:19:42,808 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 25 states. [2020-10-22 01:19:44,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:44,121 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-10-22 01:19:44,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-22 01:19:44,122 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-22 01:19:44,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:44,123 INFO L225 Difference]: With dead ends: 152 [2020-10-22 01:19:44,123 INFO L226 Difference]: Without dead ends: 143 [2020-10-22 01:19:44,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1270, Invalid=2890, Unknown=0, NotChecked=0, Total=4160 [2020-10-22 01:19:44,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-22 01:19:44,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 96. [2020-10-22 01:19:44,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-22 01:19:44,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 245 transitions. [2020-10-22 01:19:44,127 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 245 transitions. Word has length 28 [2020-10-22 01:19:44,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:44,128 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 245 transitions. [2020-10-22 01:19:44,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-22 01:19:44,128 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 245 transitions. [2020-10-22 01:19:44,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-22 01:19:44,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:44,129 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:44,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-22 01:19:44,339 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:44,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:44,339 INFO L82 PathProgramCache]: Analyzing trace with hash 512601796, now seen corresponding path program 48 times [2020-10-22 01:19:44,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:44,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802401061] [2020-10-22 01:19:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:44,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802401061] [2020-10-22 01:19:44,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940073282] [2020-10-22 01:19:44,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:19:44,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-22 01:19:44,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:44,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-22 01:19:44,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:44,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-22 01:19:44,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2020-10-22 01:19:44,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [466021490] [2020-10-22 01:19:44,612 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:44,615 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:44,621 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-10-22 01:19:44,621 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:44,638 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:44,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-22 01:19:44,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:44,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-22 01:19:44,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-22 01:19:44,639 INFO L87 Difference]: Start difference. First operand 96 states and 245 transitions. Second operand 13 states. [2020-10-22 01:19:44,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:44,661 INFO L93 Difference]: Finished difference Result 414 states and 998 transitions. [2020-10-22 01:19:44,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-22 01:19:44,662 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-22 01:19:44,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:44,662 INFO L225 Difference]: With dead ends: 414 [2020-10-22 01:19:44,662 INFO L226 Difference]: Without dead ends: 46 [2020-10-22 01:19:44,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-22 01:19:44,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-22 01:19:44,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-22 01:19:44,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-22 01:19:44,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 80 transitions. [2020-10-22 01:19:44,665 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 80 transitions. Word has length 29 [2020-10-22 01:19:44,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:44,665 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 80 transitions. [2020-10-22 01:19:44,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-22 01:19:44,666 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 80 transitions. [2020-10-22 01:19:44,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-22 01:19:44,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:44,666 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:44,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-22 01:19:44,867 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:44,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:44,868 INFO L82 PathProgramCache]: Analyzing trace with hash 374257903, now seen corresponding path program 49 times [2020-10-22 01:19:44,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:44,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276085012] [2020-10-22 01:19:44,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 72 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:44,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276085012] [2020-10-22 01:19:44,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821919251] [2020-10-22 01:19:44,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-22 01:19:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:45,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-22 01:19:45,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:45,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-22 01:19:45,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2020-10-22 01:19:45,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1785428959] [2020-10-22 01:19:45,085 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:45,089 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:45,098 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 41 transitions. [2020-10-22 01:19:45,098 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:45,161 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:45,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-22 01:19:45,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:45,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-22 01:19:45,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-10-22 01:19:45,162 INFO L87 Difference]: Start difference. First operand 46 states and 80 transitions. Second operand 13 states. [2020-10-22 01:19:45,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:45,183 INFO L93 Difference]: Finished difference Result 151 states and 219 transitions. [2020-10-22 01:19:45,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-22 01:19:45,183 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-22 01:19:45,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:45,184 INFO L225 Difference]: With dead ends: 151 [2020-10-22 01:19:45,184 INFO L226 Difference]: Without dead ends: 0 [2020-10-22 01:19:45,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-10-22 01:19:45,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-22 01:19:45,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-22 01:19:45,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-22 01:19:45,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-22 01:19:45,185 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-10-22 01:19:45,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:45,186 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-22 01:19:45,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-22 01:19:45,186 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-22 01:19:45,186 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-22 01:19:45,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:45,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 01:19:45 BasicIcfg [2020-10-22 01:19:45,390 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-22 01:19:45,392 INFO L168 Benchmark]: Toolchain (without parser) took 56212.51 ms. Allocated memory was 139.5 MB in the beginning and 504.4 MB in the end (delta: 364.9 MB). Free memory was 100.8 MB in the beginning and 275.7 MB in the end (delta: -174.8 MB). Peak memory consumption was 190.1 MB. Max. memory is 7.1 GB. [2020-10-22 01:19:45,392 INFO L168 Benchmark]: CDTParser took 2.56 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-10-22 01:19:45,393 INFO L168 Benchmark]: CACSL2BoogieTranslator took 763.05 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 99.8 MB in the beginning and 158.3 MB in the end (delta: -58.5 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-10-22 01:19:45,393 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.15 ms. Allocated memory is still 202.9 MB. Free memory was 158.3 MB in the beginning and 156.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-22 01:19:45,393 INFO L168 Benchmark]: Boogie Preprocessor took 30.49 ms. Allocated memory is still 202.9 MB. Free memory was 156.2 MB in the beginning and 154.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-10-22 01:19:45,394 INFO L168 Benchmark]: RCFGBuilder took 473.07 ms. Allocated memory is still 202.9 MB. Free memory was 154.9 MB in the beginning and 132.3 MB in the end (delta: 22.6 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-10-22 01:19:45,394 INFO L168 Benchmark]: TraceAbstraction took 54888.05 ms. Allocated memory was 202.9 MB in the beginning and 504.4 MB in the end (delta: 301.5 MB). Free memory was 132.3 MB in the beginning and 275.7 MB in the end (delta: -143.4 MB). Peak memory consumption was 158.1 MB. Max. memory is 7.1 GB. [2020-10-22 01:19:45,396 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.56 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 763.05 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 99.8 MB in the beginning and 158.3 MB in the end (delta: -58.5 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 47.15 ms. Allocated memory is still 202.9 MB. Free memory was 158.3 MB in the beginning and 156.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.49 ms. Allocated memory is still 202.9 MB. Free memory was 156.2 MB in the beginning and 154.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 473.07 ms. Allocated memory is still 202.9 MB. Free memory was 154.9 MB in the beginning and 132.3 MB in the end (delta: 22.6 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 54888.05 ms. Allocated memory was 202.9 MB in the beginning and 504.4 MB in the end (delta: 301.5 MB). Free memory was 132.3 MB in the beginning and 275.7 MB in the end (delta: -143.4 MB). Peak memory consumption was 158.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 638 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.9s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - PositiveResult [Line: 685]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 54.7s, OverallIterations: 51, TraceHistogramMax: 11, AutomataDifference: 26.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 786 SDtfs, 3016 SDslu, 3698 SDs, 0 SdLazy, 3934 SolverSat, 2667 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2798 GetRequests, 1080 SyntacticMatches, 40 SemanticMatches, 1678 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17792 ImplicationChecksByTransitivity, 26.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 51 MinimizatonAttempts, 1280 StatesRemovedByMinimization, 48 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 8.5s InterpolantComputationTime, 1914 NumberOfCodeBlocks, 1914 NumberOfCodeBlocksAsserted, 236 NumberOfCheckSat, 1816 ConstructedInterpolants, 0 QuantifiedInterpolants, 149786 SizeOfPredicates, 531 NumberOfNonLiveVariables, 6486 ConjunctsInSsa, 738 ConjunctsInUnsatCore, 98 InterpolantComputations, 6 PerfectInterpolantSequences, 362/3520 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...