/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-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-1d1d2b5 [2020-10-22 01:18:48,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-22 01:18:48,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-22 01:18:48,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-22 01:18:48,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-22 01:18:48,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-22 01:18:48,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-22 01:18:48,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-22 01:18:48,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-22 01:18:48,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-22 01:18:48,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-22 01:18:48,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-22 01:18:48,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-22 01:18:48,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-22 01:18:48,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-22 01:18:48,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-22 01:18:48,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-22 01:18:48,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-22 01:18:48,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-22 01:18:48,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-22 01:18:48,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-22 01:18:48,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-22 01:18:48,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-22 01:18:48,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-22 01:18:48,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-22 01:18:48,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-22 01:18:48,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-22 01:18:48,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-22 01:18:48,795 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-22 01:18:48,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-22 01:18:48,797 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-22 01:18:48,798 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-22 01:18:48,799 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-22 01:18:48,799 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-22 01:18:48,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-22 01:18:48,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-22 01:18:48,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-22 01:18:48,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-22 01:18:48,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-22 01:18:48,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-22 01:18:48,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-22 01:18:48,812 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 01:18:48,855 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-22 01:18:48,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-22 01:18:48,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-22 01:18:48,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-22 01:18:48,858 INFO L138 SettingsManager]: * Use SBE=true [2020-10-22 01:18:48,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-22 01:18:48,858 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-22 01:18:48,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-22 01:18:48,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-22 01:18:48,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-22 01:18:48,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-22 01:18:48,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-22 01:18:48,859 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-22 01:18:48,859 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-22 01:18:48,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-22 01:18:48,860 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-22 01:18:48,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-22 01:18:48,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-22 01:18:48,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-22 01:18:48,861 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-22 01:18:48,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-22 01:18:48,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-22 01:18:48,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-22 01:18:48,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-22 01:18:48,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-22 01:18:48,862 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-22 01:18:48,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-22 01:18:48,863 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-10-22 01:18:48,864 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-22 01:18:48,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-22 01:18:48,864 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-10-22 01:18:49,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-22 01:18:49,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-22 01:18:49,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-22 01:18:49,224 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-22 01:18:49,226 INFO L275 PluginConnector]: CDTParser initialized [2020-10-22 01:18:49,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-22 01:18:49,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebcd31737/69767599c2f041d3b590a60c37c24ea6/FLAG45d6ba6ab [2020-10-22 01:18:49,827 INFO L306 CDTParser]: Found 1 translation units. [2020-10-22 01:18:49,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-22 01:18:49,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebcd31737/69767599c2f041d3b590a60c37c24ea6/FLAG45d6ba6ab [2020-10-22 01:18:50,130 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebcd31737/69767599c2f041d3b590a60c37c24ea6 [2020-10-22 01:18:50,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-22 01:18:50,146 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-22 01:18:50,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-22 01:18:50,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-22 01:18:50,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-22 01:18:50,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 01:18:50" (1/1) ... [2020-10-22 01:18:50,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66e6cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:50, skipping insertion in model container [2020-10-22 01:18:50,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 01:18:50" (1/1) ... [2020-10-22 01:18:50,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-22 01:18:50,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-22 01:18:50,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-22 01:18:50,737 INFO L203 MainTranslator]: Completed pre-run [2020-10-22 01:18:50,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-22 01:18:50,888 INFO L208 MainTranslator]: Completed translation [2020-10-22 01:18:50,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:50 WrapperNode [2020-10-22 01:18:50,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-22 01:18:50,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-22 01:18:50,890 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-22 01:18:50,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-22 01:18:50,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:50" (1/1) ... [2020-10-22 01:18:50,916 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:50" (1/1) ... [2020-10-22 01:18:50,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-22 01:18:50,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-22 01:18:50,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-22 01:18:50,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-22 01:18:50,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:50" (1/1) ... [2020-10-22 01:18:50,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:50" (1/1) ... [2020-10-22 01:18:50,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:50" (1/1) ... [2020-10-22 01:18:50,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:50" (1/1) ... [2020-10-22 01:18:50,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:50" (1/1) ... [2020-10-22 01:18:50,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:50" (1/1) ... [2020-10-22 01:18:50,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:50" (1/1) ... [2020-10-22 01:18:50,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-22 01:18:50,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-22 01:18:50,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-22 01:18:50,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-22 01:18:50,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:50" (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 01:18:51,039 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-22 01:18:51,040 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-22 01:18:51,040 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-22 01:18:51,040 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-22 01:18:51,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-22 01:18:51,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-22 01:18:51,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-22 01:18:51,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-22 01:18:51,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-22 01:18:51,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-22 01:18:51,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-22 01:18:51,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-22 01:18:51,043 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 01:18:51,446 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-22 01:18:51,446 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-22 01:18:51,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 01:18:51 BoogieIcfgContainer [2020-10-22 01:18:51,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-22 01:18:51,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-22 01:18:51,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-22 01:18:51,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-22 01:18:51,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 01:18:50" (1/3) ... [2020-10-22 01:18:51,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bd9910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 01:18:51, skipping insertion in model container [2020-10-22 01:18:51,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 01:18:50" (2/3) ... [2020-10-22 01:18:51,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bd9910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 01:18:51, skipping insertion in model container [2020-10-22 01:18:51,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 01:18:51" (3/3) ... [2020-10-22 01:18:51,458 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-10-22 01:18:51,470 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-22 01:18:51,471 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-22 01:18:51,479 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-22 01:18:51,480 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-22 01:18:51,508 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,508 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,508 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,509 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,509 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,510 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,510 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,510 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,510 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,511 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,511 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,511 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,512 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,512 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,512 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,513 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,513 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,513 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,514 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,514 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,515 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,515 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,515 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,516 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,516 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,516 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,516 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,517 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,521 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,521 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,521 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,521 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,522 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,522 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,529 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,529 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,529 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,530 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,530 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,530 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-22 01:18:51,535 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-22 01:18:51,550 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-22 01:18:51,574 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-22 01:18:51,574 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-22 01:18:51,574 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-22 01:18:51,574 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-22 01:18:51,575 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-22 01:18:51,575 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-22 01:18:51,575 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-22 01:18:51,575 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-22 01:18:51,590 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-22 01:18:51,591 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-22 01:18:51,594 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-22 01:18:51,596 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-10-22 01:18:51,640 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-10-22 01:18:51,640 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-22 01:18:51,646 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 01:18:51,648 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-10-22 01:18:52,505 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-22 01:18:52,978 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-22 01:18:53,395 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-22 01:18:53,529 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-22 01:18:53,565 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-10-22 01:18:53,565 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-10-22 01:18:53,572 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-22 01:18:53,582 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-22 01:18:53,585 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-22 01:18:53,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-22 01:18:53,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:53,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-22 01:18:53,594 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:53,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:53,599 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-10-22 01:18:53,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:53,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578887404] [2020-10-22 01:18:53,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:53,832 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 01:18:53,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578887404] [2020-10-22 01:18:53,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-22 01:18:53,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-22 01:18:53,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [726342997] [2020-10-22 01:18:53,836 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:53,839 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:53,850 INFO L252 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-10-22 01:18:53,851 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:53,856 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:18:53,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-22 01:18:53,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:53,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-22 01:18:53,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-22 01:18:53,875 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-22 01:18:53,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:53,939 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-22 01:18:53,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-22 01:18:53,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-22 01:18:53,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:53,952 INFO L225 Difference]: With dead ends: 75 [2020-10-22 01:18:53,952 INFO L226 Difference]: Without dead ends: 42 [2020-10-22 01:18:53,954 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 01:18:53,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-22 01:18:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-22 01:18:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-22 01:18:53,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-22 01:18:53,996 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-22 01:18:53,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:53,997 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-22 01:18:53,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-22 01:18:53,997 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-22 01:18:53,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-22 01:18:53,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:53,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:53,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-22 01:18:53,999 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:53,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:53,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-10-22 01:18:54,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:54,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248004574] [2020-10-22 01:18:54,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:54,116 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 01:18:54,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248004574] [2020-10-22 01:18:54,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-22 01:18:54,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-22 01:18:54,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2082201096] [2020-10-22 01:18:54,118 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:54,119 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:54,122 INFO L252 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-10-22 01:18:54,123 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:54,182 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:18:54,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-22 01:18:54,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:54,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-22 01:18:54,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-22 01:18:54,184 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-22 01:18:54,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:54,220 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-22 01:18:54,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-22 01:18:54,221 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-22 01:18:54,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:54,222 INFO L225 Difference]: With dead ends: 56 [2020-10-22 01:18:54,223 INFO L226 Difference]: Without dead ends: 50 [2020-10-22 01:18:54,223 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 01:18:54,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-22 01:18:54,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-22 01:18:54,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-22 01:18:54,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-22 01:18:54,231 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-22 01:18:54,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:54,233 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-22 01:18:54,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-22 01:18:54,233 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-22 01:18:54,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-22 01:18:54,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:54,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:54,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-22 01:18:54,235 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:54,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:54,235 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-10-22 01:18:54,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:54,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261493082] [2020-10-22 01:18:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:54,417 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 01:18:54,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261493082] [2020-10-22 01:18:54,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-22 01:18:54,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-22 01:18:54,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [244496952] [2020-10-22 01:18:54,418 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:54,419 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:54,428 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 25 transitions. [2020-10-22 01:18:54,429 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:54,447 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:18:54,447 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:18:54,534 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:18:54,534 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:18:54,553 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [474#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-22 01:18:54,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-22 01:18:54,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:54,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-22 01:18:54,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-22 01:18:54,554 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-10-22 01:18:54,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:54,694 INFO L93 Difference]: Finished difference Result 66 states and 152 transitions. [2020-10-22 01:18:54,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-22 01:18:54,695 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-10-22 01:18:54,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:54,696 INFO L225 Difference]: With dead ends: 66 [2020-10-22 01:18:54,696 INFO L226 Difference]: Without dead ends: 50 [2020-10-22 01:18:54,697 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 01:18:54,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-22 01:18:54,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-22 01:18:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-22 01:18:54,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2020-10-22 01:18:54,706 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 10 [2020-10-22 01:18:54,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:54,707 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2020-10-22 01:18:54,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-22 01:18:54,707 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2020-10-22 01:18:54,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-22 01:18:54,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:54,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:54,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-22 01:18:54,710 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:54,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:54,710 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 2 times [2020-10-22 01:18:54,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:54,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362541741] [2020-10-22 01:18:54,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:54,820 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 01:18:54,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362541741] [2020-10-22 01:18:54,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-22 01:18:54,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-22 01:18:54,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [372182774] [2020-10-22 01:18:54,822 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:54,823 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:54,825 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-10-22 01:18:54,825 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:54,877 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:18:54,878 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:18:54,930 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [639#(and (<= ~i~0 7) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:18:54,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-22 01:18:54,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:54,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-22 01:18:54,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-22 01:18:54,932 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 7 states. [2020-10-22 01:18:55,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:55,025 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-22 01:18:55,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-22 01:18:55,027 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-10-22 01:18:55,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:55,028 INFO L225 Difference]: With dead ends: 67 [2020-10-22 01:18:55,029 INFO L226 Difference]: Without dead ends: 54 [2020-10-22 01:18:55,029 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 01:18:55,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-22 01:18:55,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-10-22 01:18:55,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-22 01:18:55,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-22 01:18:55,036 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 10 [2020-10-22 01:18:55,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:55,036 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-22 01:18:55,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-22 01:18:55,036 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-22 01:18:55,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-22 01:18:55,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:55,037 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:55,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-22 01:18:55,038 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:55,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:55,038 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 3 times [2020-10-22 01:18:55,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:55,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799744992] [2020-10-22 01:18:55,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:55,105 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 01:18:55,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799744992] [2020-10-22 01:18:55,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825231850] [2020-10-22 01:18:55,106 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 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 01:18:55,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-22 01:18:55,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:18:55,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-22 01:18:55,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:18:55,227 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 01:18:55,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:18:55,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-22 01:18:55,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1424118989] [2020-10-22 01:18:55,228 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:55,229 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:55,231 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-10-22 01:18:55,232 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:55,277 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [835#(and (<= ~i~0 5) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:18:55,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-22 01:18:55,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:55,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-22 01:18:55,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-22 01:18:55,278 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 8 states. [2020-10-22 01:18:55,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:55,464 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-10-22 01:18:55,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-22 01:18:55,465 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-22 01:18:55,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:55,466 INFO L225 Difference]: With dead ends: 63 [2020-10-22 01:18:55,466 INFO L226 Difference]: Without dead ends: 54 [2020-10-22 01:18:55,467 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 01:18:55,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-22 01:18:55,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-10-22 01:18:55,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-22 01:18:55,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-10-22 01:18:55,473 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-10-22 01:18:55,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:55,474 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-10-22 01:18:55,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-22 01:18:55,474 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-10-22 01:18:55,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-22 01:18:55,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:55,475 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:55,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:18:55,689 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:55,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:55,690 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 4 times [2020-10-22 01:18:55,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:55,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836023794] [2020-10-22 01:18:55,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:55,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836023794] [2020-10-22 01:18:55,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963146324] [2020-10-22 01:18:55,782 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 01:18:55,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:18:55,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:18:55,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-22 01:18:55,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:18:55,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:18:55,889 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 01:18:55,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:18:55,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-22 01:18:55,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [463840484] [2020-10-22 01:18:55,891 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:55,892 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:55,895 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 23 transitions. [2020-10-22 01:18:55,896 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:55,956 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:18:55,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-22 01:18:55,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:55,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-22 01:18:55,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-22 01:18:55,957 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 7 states. [2020-10-22 01:18:56,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:56,097 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-10-22 01:18:56,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-22 01:18:56,098 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-22 01:18:56,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:56,099 INFO L225 Difference]: With dead ends: 56 [2020-10-22 01:18:56,099 INFO L226 Difference]: Without dead ends: 51 [2020-10-22 01:18:56,100 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 01:18:56,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-22 01:18:56,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-10-22 01:18:56,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-22 01:18:56,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-22 01:18:56,105 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-22 01:18:56,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:56,105 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-22 01:18:56,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-22 01:18:56,106 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-22 01:18:56,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-22 01:18:56,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:56,107 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:56,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:18:56,316 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:56,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:56,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 5 times [2020-10-22 01:18:56,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:56,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681246494] [2020-10-22 01:18:56,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:56,451 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 01:18:56,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681246494] [2020-10-22 01:18:56,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024168157] [2020-10-22 01:18:56,452 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 01:18:56,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:18:56,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:18:56,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-22 01:18:56,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:18:56,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:18:56,577 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 01:18:56,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:18:56,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-22 01:18:56,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1583444733] [2020-10-22 01:18:56,581 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:56,583 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:56,586 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-10-22 01:18:56,586 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:56,592 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:18:56,593 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:18:56,695 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:18:56,696 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:18:56,723 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1218#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-22 01:18:56,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-22 01:18:56,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:56,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-22 01:18:56,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-22 01:18:56,725 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 9 states. [2020-10-22 01:18:56,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:56,884 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-10-22 01:18:56,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-22 01:18:56,885 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-22 01:18:56,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:56,886 INFO L225 Difference]: With dead ends: 56 [2020-10-22 01:18:56,886 INFO L226 Difference]: Without dead ends: 50 [2020-10-22 01:18:56,886 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 01:18:56,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-22 01:18:56,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-22 01:18:56,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-22 01:18:56,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 113 transitions. [2020-10-22 01:18:56,895 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 113 transitions. Word has length 12 [2020-10-22 01:18:56,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:56,896 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 113 transitions. [2020-10-22 01:18:56,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-22 01:18:56,896 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 113 transitions. [2020-10-22 01:18:56,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-22 01:18:56,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:56,899 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:57,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:18:57,115 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:57,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:57,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 6 times [2020-10-22 01:18:57,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:57,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356504361] [2020-10-22 01:18:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:57,189 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 01:18:57,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356504361] [2020-10-22 01:18:57,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766845216] [2020-10-22 01:18:57,190 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 01:18:57,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-22 01:18:57,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:18:57,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-22 01:18:57,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:18:57,302 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:18:57,322 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 01:18:57,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:18:57,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-22 01:18:57,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1980378300] [2020-10-22 01:18:57,324 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:57,326 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:57,330 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-10-22 01:18:57,330 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:57,360 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:18:57,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-22 01:18:57,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:57,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-22 01:18:57,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-22 01:18:57,362 INFO L87 Difference]: Start difference. First operand 47 states and 113 transitions. Second operand 8 states. [2020-10-22 01:18:57,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:57,702 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-10-22 01:18:57,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-22 01:18:57,703 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-22 01:18:57,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:57,705 INFO L225 Difference]: With dead ends: 64 [2020-10-22 01:18:57,705 INFO L226 Difference]: Without dead ends: 59 [2020-10-22 01:18:57,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-22 01:18:57,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-22 01:18:57,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-10-22 01:18:57,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-22 01:18:57,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2020-10-22 01:18:57,710 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 12 [2020-10-22 01:18:57,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:57,711 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2020-10-22 01:18:57,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-22 01:18:57,711 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2020-10-22 01:18:57,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-22 01:18:57,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:57,712 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:57,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:18:57,924 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:57,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:57,925 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 7 times [2020-10-22 01:18:57,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:57,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443998521] [2020-10-22 01:18:57,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:57,997 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 01:18:57,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443998521] [2020-10-22 01:18:57,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305015922] [2020-10-22 01:18:57,998 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 01:18:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:58,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-22 01:18:58,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:18:58,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:18:58,109 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 01:18:58,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:18:58,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-22 01:18:58,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [340984914] [2020-10-22 01:18:58,110 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:58,111 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:58,114 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-10-22 01:18:58,114 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:58,192 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1631#(and (<= ~i~0 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:18:58,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-22 01:18:58,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:58,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-22 01:18:58,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-22 01:18:58,193 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 9 states. [2020-10-22 01:18:58,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:58,384 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-10-22 01:18:58,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-22 01:18:58,385 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-22 01:18:58,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:58,387 INFO L225 Difference]: With dead ends: 72 [2020-10-22 01:18:58,387 INFO L226 Difference]: Without dead ends: 63 [2020-10-22 01:18:58,388 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 01:18:58,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-22 01:18:58,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2020-10-22 01:18:58,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-22 01:18:58,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-22 01:18:58,398 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 12 [2020-10-22 01:18:58,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:58,401 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-22 01:18:58,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-22 01:18:58,401 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-22 01:18:58,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-22 01:18:58,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:58,402 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:58,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:18:58,616 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:58,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:58,616 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 8 times [2020-10-22 01:18:58,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:58,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724092119] [2020-10-22 01:18:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:18:58,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724092119] [2020-10-22 01:18:58,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937022361] [2020-10-22 01:18:58,686 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 01:18:58,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:18:58,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:18:58,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-22 01:18:58,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:18:58,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:18:58,808 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 01:18:58,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:18:58,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-22 01:18:58,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [106355622] [2020-10-22 01:18:58,809 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:58,810 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:58,813 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-10-22 01:18:58,813 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:58,852 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1860#(and (<= ~i~0 7) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:18:58,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-22 01:18:58,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:58,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-22 01:18:58,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-22 01:18:58,853 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 10 states. [2020-10-22 01:18:59,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:59,104 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-10-22 01:18:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-22 01:18:59,104 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-22 01:18:59,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:59,105 INFO L225 Difference]: With dead ends: 72 [2020-10-22 01:18:59,105 INFO L226 Difference]: Without dead ends: 63 [2020-10-22 01:18:59,106 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 01:18:59,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-22 01:18:59,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-10-22 01:18:59,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-22 01:18:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-22 01:18:59,135 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-10-22 01:18:59,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:59,136 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-22 01:18:59,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-22 01:18:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-22 01:18:59,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-22 01:18:59,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:59,140 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:59,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:18:59,352 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:59,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:59,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 9 times [2020-10-22 01:18:59,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:18:59,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305893084] [2020-10-22 01:18:59,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:18:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:18:59,419 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 01:18:59,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305893084] [2020-10-22 01:18:59,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306419081] [2020-10-22 01:18:59,420 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 01:18:59,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-22 01:18:59,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:18:59,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-22 01:18:59,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:18:59,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:18:59,517 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 01:18:59,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:18:59,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-22 01:18:59,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1527750750] [2020-10-22 01:18:59,518 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:18:59,519 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:18:59,522 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-10-22 01:18:59,522 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:18:59,572 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:18:59,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-22 01:18:59,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:18:59,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-22 01:18:59,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-22 01:18:59,574 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-10-22 01:18:59,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:18:59,778 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-22 01:18:59,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-22 01:18:59,778 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-22 01:18:59,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:18:59,779 INFO L225 Difference]: With dead ends: 64 [2020-10-22 01:18:59,779 INFO L226 Difference]: Without dead ends: 59 [2020-10-22 01:18:59,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-22 01:18:59,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-22 01:18:59,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-10-22 01:18:59,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-22 01:18:59,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-22 01:18:59,787 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-22 01:18:59,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:18:59,787 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-22 01:18:59,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-22 01:18:59,787 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-22 01:18:59,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-22 01:18:59,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:18:59,788 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:18:59,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:18:59,998 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:18:59,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:18:59,999 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 10 times [2020-10-22 01:19:00,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:00,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193755624] [2020-10-22 01:19:00,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:00,099 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 01:19:00,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193755624] [2020-10-22 01:19:00,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031114157] [2020-10-22 01:19:00,100 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 01:19:00,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:19:00,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:00,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-22 01:19:00,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:00,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:00,190 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 01:19:00,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:00,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-22 01:19:00,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [488210161] [2020-10-22 01:19:00,191 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:00,200 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:00,205 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-10-22 01:19:00,205 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:00,242 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:00,242 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:00,271 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:00,271 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:00,302 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:00,302 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:00,308 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2312#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-22 01:19:00,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-22 01:19:00,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:00,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-22 01:19:00,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-22 01:19:00,309 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 11 states. [2020-10-22 01:19:00,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:00,503 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-10-22 01:19:00,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-22 01:19:00,503 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-22 01:19:00,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:00,504 INFO L225 Difference]: With dead ends: 64 [2020-10-22 01:19:00,505 INFO L226 Difference]: Without dead ends: 58 [2020-10-22 01:19:00,505 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 01:19:00,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-22 01:19:00,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-10-22 01:19:00,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-22 01:19:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 129 transitions. [2020-10-22 01:19:00,509 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 129 transitions. Word has length 14 [2020-10-22 01:19:00,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:00,510 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 129 transitions. [2020-10-22 01:19:00,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-22 01:19:00,510 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 129 transitions. [2020-10-22 01:19:00,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-22 01:19:00,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:00,511 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:00,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-22 01:19:00,723 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:00,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:00,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 11 times [2020-10-22 01:19:00,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:00,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005785973] [2020-10-22 01:19:00,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:00,797 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 01:19:00,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005785973] [2020-10-22 01:19:00,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623751824] [2020-10-22 01:19:00,797 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 01:19:00,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-22 01:19:00,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:00,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-22 01:19:00,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:00,886 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:00,899 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 01:19:00,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:00,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-22 01:19:00,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1094773821] [2020-10-22 01:19:00,900 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:00,902 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:00,904 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-10-22 01:19:00,905 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:00,929 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:00,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-22 01:19:00,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:00,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-22 01:19:00,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-22 01:19:00,930 INFO L87 Difference]: Start difference. First operand 53 states and 129 transitions. Second operand 10 states. [2020-10-22 01:19:01,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:01,267 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-22 01:19:01,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-22 01:19:01,268 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-22 01:19:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:01,269 INFO L225 Difference]: With dead ends: 74 [2020-10-22 01:19:01,269 INFO L226 Difference]: Without dead ends: 69 [2020-10-22 01:19:01,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-22 01:19:01,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-22 01:19:01,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 46. [2020-10-22 01:19:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-22 01:19:01,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 109 transitions. [2020-10-22 01:19:01,275 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 109 transitions. Word has length 14 [2020-10-22 01:19:01,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:01,275 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 109 transitions. [2020-10-22 01:19:01,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-22 01:19:01,276 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 109 transitions. [2020-10-22 01:19:01,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-22 01:19:01,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:01,278 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:01,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:01,489 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:01,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:01,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 12 times [2020-10-22 01:19:01,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:01,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832239329] [2020-10-22 01:19:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:01,584 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 01:19:01,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832239329] [2020-10-22 01:19:01,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836119615] [2020-10-22 01:19:01,584 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 01:19:01,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-22 01:19:01,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:01,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-22 01:19:01,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:01,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:01,679 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 01:19:01,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:01,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-22 01:19:01,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1382607238] [2020-10-22 01:19:01,680 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:01,682 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:01,684 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-10-22 01:19:01,684 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:01,759 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2791#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 11))] [2020-10-22 01:19:01,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-22 01:19:01,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:01,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-22 01:19:01,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-22 01:19:01,760 INFO L87 Difference]: Start difference. First operand 46 states and 109 transitions. Second operand 11 states. [2020-10-22 01:19:02,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:02,057 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-10-22 01:19:02,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-22 01:19:02,057 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-22 01:19:02,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:02,059 INFO L225 Difference]: With dead ends: 82 [2020-10-22 01:19:02,059 INFO L226 Difference]: Without dead ends: 73 [2020-10-22 01:19:02,060 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 01:19:02,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-22 01:19:02,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-22 01:19:02,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-22 01:19:02,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-22 01:19:02,064 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 14 [2020-10-22 01:19:02,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:02,064 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-22 01:19:02,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-22 01:19:02,064 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-22 01:19:02,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-22 01:19:02,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:02,065 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:02,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:02,278 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:02,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:02,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 13 times [2020-10-22 01:19:02,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:02,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518287072] [2020-10-22 01:19:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:02,358 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 01:19:02,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518287072] [2020-10-22 01:19:02,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845256442] [2020-10-22 01:19:02,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:19:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:02,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-22 01:19:02,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:02,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:02,458 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 01:19:02,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:02,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-22 01:19:02,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [113776452] [2020-10-22 01:19:02,459 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:02,460 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:02,462 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-10-22 01:19:02,463 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:02,506 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3058#(and (<= ~i~0 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:02,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-22 01:19:02,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:02,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-22 01:19:02,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-22 01:19:02,508 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 12 states. [2020-10-22 01:19:02,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:02,891 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-10-22 01:19:02,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-22 01:19:02,891 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-22 01:19:02,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:02,892 INFO L225 Difference]: With dead ends: 82 [2020-10-22 01:19:02,892 INFO L226 Difference]: Without dead ends: 73 [2020-10-22 01:19:02,893 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 01:19:02,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-22 01:19:02,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-10-22 01:19:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-22 01:19:02,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-22 01:19:02,896 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-10-22 01:19:02,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:02,896 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-22 01:19:02,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-22 01:19:02,897 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-22 01:19:02,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-22 01:19:02,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:02,897 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:03,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-22 01:19:03,103 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:03,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:03,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 14 times [2020-10-22 01:19:03,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:03,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202597429] [2020-10-22 01:19:03,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:03,184 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 01:19:03,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202597429] [2020-10-22 01:19:03,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710803768] [2020-10-22 01:19:03,185 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 01:19:03,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:19:03,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:03,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-22 01:19:03,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:03,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:03,303 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 01:19:03,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:03,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-22 01:19:03,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [5526140] [2020-10-22 01:19:03,304 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:03,305 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:03,307 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2020-10-22 01:19:03,307 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:03,353 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:03,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-22 01:19:03,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:03,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-22 01:19:03,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-22 01:19:03,354 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-10-22 01:19:03,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:03,693 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-10-22 01:19:03,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-22 01:19:03,694 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-22 01:19:03,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:03,694 INFO L225 Difference]: With dead ends: 72 [2020-10-22 01:19:03,695 INFO L226 Difference]: Without dead ends: 67 [2020-10-22 01:19:03,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2020-10-22 01:19:03,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-22 01:19:03,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-10-22 01:19:03,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-22 01:19:03,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-22 01:19:03,698 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-22 01:19:03,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:03,698 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-22 01:19:03,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-22 01:19:03,698 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-22 01:19:03,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-22 01:19:03,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:03,699 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:03,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-22 01:19:03,909 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:03,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:03,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 15 times [2020-10-22 01:19:03,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:03,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211836770] [2020-10-22 01:19:03,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:04,050 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 01:19:04,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211836770] [2020-10-22 01:19:04,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345475029] [2020-10-22 01:19:04,051 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 01:19:04,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-22 01:19:04,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:04,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-22 01:19:04,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:04,134 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:04,149 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 01:19:04,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:04,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-22 01:19:04,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [330573252] [2020-10-22 01:19:04,150 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:04,152 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:04,156 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 31 transitions. [2020-10-22 01:19:04,156 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:04,205 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:04,206 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:04,284 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3580#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-22 01:19:04,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-22 01:19:04,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:04,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-22 01:19:04,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-22 01:19:04,285 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 13 states. [2020-10-22 01:19:04,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:04,506 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-10-22 01:19:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-22 01:19:04,507 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-22 01:19:04,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:04,508 INFO L225 Difference]: With dead ends: 72 [2020-10-22 01:19:04,508 INFO L226 Difference]: Without dead ends: 66 [2020-10-22 01:19:04,508 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 01:19:04,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-22 01:19:04,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-10-22 01:19:04,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-22 01:19:04,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-22 01:19:04,518 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 16 [2020-10-22 01:19:04,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:04,518 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-22 01:19:04,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-22 01:19:04,519 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-22 01:19:04,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-22 01:19:04,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:04,519 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:04,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-22 01:19:04,724 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:04,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:04,725 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 16 times [2020-10-22 01:19:04,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:04,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225414848] [2020-10-22 01:19:04,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:04,814 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 01:19:04,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225414848] [2020-10-22 01:19:04,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975549216] [2020-10-22 01:19:04,815 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 01:19:04,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:19:04,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:04,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-22 01:19:04,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:04,916 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:04,927 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 01:19:04,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:04,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-22 01:19:04,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [548327342] [2020-10-22 01:19:04,928 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:04,930 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:04,932 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 24 transitions. [2020-10-22 01:19:04,932 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:04,951 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:04,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-22 01:19:04,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:04,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-22 01:19:04,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-22 01:19:04,952 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 12 states. [2020-10-22 01:19:05,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:05,346 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-22 01:19:05,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-22 01:19:05,347 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-22 01:19:05,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:05,348 INFO L225 Difference]: With dead ends: 84 [2020-10-22 01:19:05,348 INFO L226 Difference]: Without dead ends: 79 [2020-10-22 01:19:05,349 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 01:19:05,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-22 01:19:05,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2020-10-22 01:19:05,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-22 01:19:05,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 119 transitions. [2020-10-22 01:19:05,353 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 119 transitions. Word has length 16 [2020-10-22 01:19:05,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:05,353 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 119 transitions. [2020-10-22 01:19:05,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-22 01:19:05,353 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 119 transitions. [2020-10-22 01:19:05,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-22 01:19:05,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:05,353 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:05,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:05,554 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:05,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:05,555 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 17 times [2020-10-22 01:19:05,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:05,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658561123] [2020-10-22 01:19:05,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:05,660 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 01:19:05,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658561123] [2020-10-22 01:19:05,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509973330] [2020-10-22 01:19:05,661 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 01:19:05,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-22 01:19:05,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:05,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-22 01:19:05,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:05,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:05,756 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 01:19:05,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:05,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-22 01:19:05,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1452521600] [2020-10-22 01:19:05,757 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:05,758 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:05,761 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-10-22 01:19:05,761 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:05,826 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4125#(and (<= ~i~0 13) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:05,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-22 01:19:05,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:05,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-22 01:19:05,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-22 01:19:05,827 INFO L87 Difference]: Start difference. First operand 50 states and 119 transitions. Second operand 13 states. [2020-10-22 01:19:06,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:06,226 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-22 01:19:06,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-22 01:19:06,226 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-22 01:19:06,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:06,228 INFO L225 Difference]: With dead ends: 92 [2020-10-22 01:19:06,228 INFO L226 Difference]: Without dead ends: 83 [2020-10-22 01:19:06,229 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 01:19:06,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-22 01:19:06,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-22 01:19:06,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-22 01:19:06,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-22 01:19:06,231 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 16 [2020-10-22 01:19:06,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:06,232 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-22 01:19:06,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-22 01:19:06,232 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-22 01:19:06,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-22 01:19:06,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:06,232 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:06,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:06,436 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:06,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:06,436 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 18 times [2020-10-22 01:19:06,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:06,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59110824] [2020-10-22 01:19:06,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:06,527 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 01:19:06,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59110824] [2020-10-22 01:19:06,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052931889] [2020-10-22 01:19:06,528 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 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 01:19:06,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-22 01:19:06,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:06,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-22 01:19:06,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:06,632 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:06,642 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 01:19:06,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:06,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-22 01:19:06,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [798260839] [2020-10-22 01:19:06,644 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:06,646 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:06,649 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-10-22 01:19:06,649 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:06,692 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4430#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 11))] [2020-10-22 01:19:06,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-22 01:19:06,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:06,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-22 01:19:06,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-22 01:19:06,693 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 14 states. [2020-10-22 01:19:07,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:07,162 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-22 01:19:07,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-22 01:19:07,168 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-22 01:19:07,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:07,169 INFO L225 Difference]: With dead ends: 92 [2020-10-22 01:19:07,169 INFO L226 Difference]: Without dead ends: 83 [2020-10-22 01:19:07,170 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 01:19:07,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-22 01:19:07,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-10-22 01:19:07,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-22 01:19:07,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-22 01:19:07,173 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-10-22 01:19:07,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:07,173 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-22 01:19:07,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-22 01:19:07,173 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-22 01:19:07,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-22 01:19:07,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:07,174 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:07,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:07,381 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:07,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:07,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 19 times [2020-10-22 01:19:07,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:07,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144846570] [2020-10-22 01:19:07,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:07,475 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 01:19:07,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144846570] [2020-10-22 01:19:07,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594178275] [2020-10-22 01:19:07,475 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 01:19:07,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:07,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-22 01:19:07,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:07,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:07,642 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 01:19:07,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:07,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-22 01:19:07,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [944414753] [2020-10-22 01:19:07,643 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:07,646 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:07,650 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2020-10-22 01:19:07,651 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:07,717 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:07,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-22 01:19:07,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:07,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-22 01:19:07,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-22 01:19:07,718 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-10-22 01:19:08,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:08,300 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-10-22 01:19:08,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-22 01:19:08,301 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-22 01:19:08,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:08,301 INFO L225 Difference]: With dead ends: 80 [2020-10-22 01:19:08,302 INFO L226 Difference]: Without dead ends: 75 [2020-10-22 01:19:08,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2020-10-22 01:19:08,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-22 01:19:08,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-10-22 01:19:08,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-22 01:19:08,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-22 01:19:08,308 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-22 01:19:08,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:08,310 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-22 01:19:08,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-22 01:19:08,310 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-22 01:19:08,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-22 01:19:08,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:08,312 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:08,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-22 01:19:08,523 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:08,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:08,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 20 times [2020-10-22 01:19:08,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:08,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413514964] [2020-10-22 01:19:08,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:08,708 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 01:19:08,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413514964] [2020-10-22 01:19:08,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593383765] [2020-10-22 01:19:08,708 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 01:19:08,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:19:08,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:08,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-22 01:19:08,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:08,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:08,811 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 01:19:08,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:08,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-22 01:19:08,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1642885073] [2020-10-22 01:19:08,812 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:08,814 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:08,818 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 33 transitions. [2020-10-22 01:19:08,819 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:08,883 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:08,883 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:08,912 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:08,913 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:08,945 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5022#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-22 01:19:08,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-22 01:19:08,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:08,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-22 01:19:08,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-22 01:19:08,946 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 15 states. [2020-10-22 01:19:09,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:09,253 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-22 01:19:09,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-22 01:19:09,253 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-22 01:19:09,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:09,254 INFO L225 Difference]: With dead ends: 80 [2020-10-22 01:19:09,254 INFO L226 Difference]: Without dead ends: 74 [2020-10-22 01:19:09,254 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 01:19:09,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-22 01:19:09,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2020-10-22 01:19:09,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-22 01:19:09,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-22 01:19:09,257 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 18 [2020-10-22 01:19:09,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:09,257 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-22 01:19:09,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-22 01:19:09,257 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-22 01:19:09,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-22 01:19:09,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:09,258 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:09,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-22 01:19:09,459 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:09,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:09,459 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 21 times [2020-10-22 01:19:09,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:09,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312563169] [2020-10-22 01:19:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:09,556 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 01:19:09,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312563169] [2020-10-22 01:19:09,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824146141] [2020-10-22 01:19:09,557 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 01:19:09,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-22 01:19:09,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:09,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-22 01:19:09,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:09,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:09,686 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 01:19:09,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:09,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-22 01:19:09,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1530905222] [2020-10-22 01:19:09,687 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:09,689 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:09,694 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 26 transitions. [2020-10-22 01:19:09,694 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:09,715 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:09,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-22 01:19:09,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:09,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-22 01:19:09,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-22 01:19:09,716 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 14 states. [2020-10-22 01:19:10,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:10,239 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-22 01:19:10,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-22 01:19:10,240 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-22 01:19:10,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:10,241 INFO L225 Difference]: With dead ends: 94 [2020-10-22 01:19:10,241 INFO L226 Difference]: Without dead ends: 89 [2020-10-22 01:19:10,242 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 01:19:10,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-22 01:19:10,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 54. [2020-10-22 01:19:10,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-22 01:19:10,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 129 transitions. [2020-10-22 01:19:10,245 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 129 transitions. Word has length 18 [2020-10-22 01:19:10,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:10,245 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 129 transitions. [2020-10-22 01:19:10,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-22 01:19:10,245 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 129 transitions. [2020-10-22 01:19:10,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-22 01:19:10,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:10,246 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:10,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-22 01:19:10,447 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:10,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:10,447 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 22 times [2020-10-22 01:19:10,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:10,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903666256] [2020-10-22 01:19:10,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:10,550 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 01:19:10,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903666256] [2020-10-22 01:19:10,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062754455] [2020-10-22 01:19:10,551 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 01:19:10,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:19:10,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:10,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-22 01:19:10,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:10,643 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:10,654 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 01:19:10,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:10,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-22 01:19:10,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1045332648] [2020-10-22 01:19:10,655 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:10,658 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:10,661 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-10-22 01:19:10,661 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:10,734 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5633#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 15))] [2020-10-22 01:19:10,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-22 01:19:10,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:10,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-22 01:19:10,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-22 01:19:10,735 INFO L87 Difference]: Start difference. First operand 54 states and 129 transitions. Second operand 15 states. [2020-10-22 01:19:11,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:11,280 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-10-22 01:19:11,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-22 01:19:11,280 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-22 01:19:11,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:11,282 INFO L225 Difference]: With dead ends: 102 [2020-10-22 01:19:11,282 INFO L226 Difference]: Without dead ends: 93 [2020-10-22 01:19:11,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2020-10-22 01:19:11,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-22 01:19:11,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-10-22 01:19:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-22 01:19:11,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-22 01:19:11,287 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 18 [2020-10-22 01:19:11,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:11,287 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-22 01:19:11,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-22 01:19:11,287 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-22 01:19:11,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-22 01:19:11,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:11,288 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:11,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-22 01:19:11,495 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:11,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:11,495 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 23 times [2020-10-22 01:19:11,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:11,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617895756] [2020-10-22 01:19:11,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:11,633 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 01:19:11,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617895756] [2020-10-22 01:19:11,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963496273] [2020-10-22 01:19:11,634 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 01:19:11,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-22 01:19:11,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:11,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-22 01:19:11,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:11,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:11,739 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 01:19:11,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:11,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-22 01:19:11,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1865544712] [2020-10-22 01:19:11,741 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:11,742 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:11,745 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-10-22 01:19:11,745 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:11,795 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5976#(and (<= ~i~0 13) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:11,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-22 01:19:11,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:11,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-22 01:19:11,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-22 01:19:11,796 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 16 states. [2020-10-22 01:19:12,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:12,412 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-10-22 01:19:12,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-22 01:19:12,412 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-22 01:19:12,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:12,413 INFO L225 Difference]: With dead ends: 102 [2020-10-22 01:19:12,413 INFO L226 Difference]: Without dead ends: 93 [2020-10-22 01:19:12,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=488, Invalid=1072, Unknown=0, NotChecked=0, Total=1560 [2020-10-22 01:19:12,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-22 01:19:12,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-10-22 01:19:12,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-22 01:19:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-10-22 01:19:12,416 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 19 [2020-10-22 01:19:12,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:12,417 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-10-22 01:19:12,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-22 01:19:12,417 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-10-22 01:19:12,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-22 01:19:12,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:12,418 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:12,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-22 01:19:12,628 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:12,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:12,628 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 24 times [2020-10-22 01:19:12,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:12,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981842576] [2020-10-22 01:19:12,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:12,736 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 01:19:12,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981842576] [2020-10-22 01:19:12,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175275430] [2020-10-22 01:19:12,737 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 01:19:12,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-22 01:19:12,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:12,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-22 01:19:12,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:12,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:12,865 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 01:19:12,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:12,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-22 01:19:12,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1645208499] [2020-10-22 01:19:12,866 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:12,868 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:12,872 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2020-10-22 01:19:12,873 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:12,930 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:12,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-22 01:19:12,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:12,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-22 01:19:12,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-22 01:19:12,931 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-10-22 01:19:13,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:13,525 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-10-22 01:19:13,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-22 01:19:13,526 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-22 01:19:13,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:13,527 INFO L225 Difference]: With dead ends: 88 [2020-10-22 01:19:13,527 INFO L226 Difference]: Without dead ends: 83 [2020-10-22 01:19:13,528 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 01:19:13,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-22 01:19:13,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-10-22 01:19:13,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-22 01:19:13,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-22 01:19:13,531 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-22 01:19:13,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:13,531 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-22 01:19:13,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-22 01:19:13,531 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-22 01:19:13,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-22 01:19:13,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:13,532 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:13,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:13,742 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:13,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:13,742 INFO L82 PathProgramCache]: Analyzing trace with hash -923845315, now seen corresponding path program 25 times [2020-10-22 01:19:13,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:13,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028085565] [2020-10-22 01:19:13,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:13,911 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 01:19:13,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028085565] [2020-10-22 01:19:13,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834546254] [2020-10-22 01:19:13,912 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 01:19:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:13,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-22 01:19:13,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:13,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:13,988 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 01:19:13,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:13,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-22 01:19:13,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1561441187] [2020-10-22 01:19:13,989 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:13,991 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:13,995 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2020-10-22 01:19:13,995 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:14,002 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:14,002 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:14,064 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:14,065 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:14,087 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:14,087 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:14,099 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6638#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-22 01:19:14,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-22 01:19:14,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:14,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-22 01:19:14,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-22 01:19:14,100 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 17 states. [2020-10-22 01:19:14,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:14,463 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-10-22 01:19:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-22 01:19:14,463 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-22 01:19:14,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:14,464 INFO L225 Difference]: With dead ends: 88 [2020-10-22 01:19:14,464 INFO L226 Difference]: Without dead ends: 82 [2020-10-22 01:19:14,465 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 01:19:14,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-22 01:19:14,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2020-10-22 01:19:14,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-22 01:19:14,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-22 01:19:14,468 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 20 [2020-10-22 01:19:14,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:14,469 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-22 01:19:14,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-22 01:19:14,469 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-22 01:19:14,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-22 01:19:14,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:14,470 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:14,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-22 01:19:14,681 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:14,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:14,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1384142351, now seen corresponding path program 26 times [2020-10-22 01:19:14,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:14,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820336947] [2020-10-22 01:19:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:14,823 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 01:19:14,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820336947] [2020-10-22 01:19:14,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124133487] [2020-10-22 01:19:14,824 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 01:19:14,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:19:14,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:14,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-22 01:19:14,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:14,909 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:14,925 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 01:19:14,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:14,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-22 01:19:14,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1404720678] [2020-10-22 01:19:14,926 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:14,928 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:14,932 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 28 transitions. [2020-10-22 01:19:14,932 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:14,953 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:14,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-22 01:19:14,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:14,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-22 01:19:14,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-22 01:19:14,954 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 16 states. [2020-10-22 01:19:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:15,623 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-22 01:19:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-22 01:19:15,625 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-22 01:19:15,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:15,626 INFO L225 Difference]: With dead ends: 104 [2020-10-22 01:19:15,626 INFO L226 Difference]: Without dead ends: 99 [2020-10-22 01:19:15,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=549, Invalid=1173, Unknown=0, NotChecked=0, Total=1722 [2020-10-22 01:19:15,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-22 01:19:15,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 58. [2020-10-22 01:19:15,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-22 01:19:15,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 139 transitions. [2020-10-22 01:19:15,630 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 139 transitions. Word has length 20 [2020-10-22 01:19:15,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:15,631 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 139 transitions. [2020-10-22 01:19:15,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-22 01:19:15,631 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 139 transitions. [2020-10-22 01:19:15,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-22 01:19:15,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:15,631 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:15,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:15,843 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:15,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:15,843 INFO L82 PathProgramCache]: Analyzing trace with hash -215934529, now seen corresponding path program 27 times [2020-10-22 01:19:15,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:15,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026037302] [2020-10-22 01:19:15,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:15,983 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 01:19:15,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026037302] [2020-10-22 01:19:15,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047631612] [2020-10-22 01:19:15,983 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 01:19:16,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-22 01:19:16,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:16,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-22 01:19:16,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:16,081 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:16,095 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 01:19:16,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:16,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-22 01:19:16,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [505036586] [2020-10-22 01:19:16,096 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:16,099 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:16,103 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-10-22 01:19:16,103 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:16,175 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7315#(and (<= ~i~0 17) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:16,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-22 01:19:16,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:16,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-22 01:19:16,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-10-22 01:19:16,176 INFO L87 Difference]: Start difference. First operand 58 states and 139 transitions. Second operand 17 states. [2020-10-22 01:19:16,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:16,846 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-10-22 01:19:16,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-22 01:19:16,847 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-22 01:19:16,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:16,848 INFO L225 Difference]: With dead ends: 112 [2020-10-22 01:19:16,848 INFO L226 Difference]: Without dead ends: 103 [2020-10-22 01:19:16,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=502, Invalid=1138, Unknown=0, NotChecked=0, Total=1640 [2020-10-22 01:19:16,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-22 01:19:16,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 72. [2020-10-22 01:19:16,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-22 01:19:16,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-22 01:19:16,852 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 20 [2020-10-22 01:19:16,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:16,853 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-22 01:19:16,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-22 01:19:16,853 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-22 01:19:16,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-22 01:19:16,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:16,854 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:17,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-22 01:19:17,064 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:17,064 INFO L82 PathProgramCache]: Analyzing trace with hash -41234864, now seen corresponding path program 28 times [2020-10-22 01:19:17,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:17,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655397038] [2020-10-22 01:19:17,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:17,215 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 01:19:17,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655397038] [2020-10-22 01:19:17,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510850914] [2020-10-22 01:19:17,216 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 01:19:17,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:19:17,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:17,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-22 01:19:17,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:17,306 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:17,324 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 01:19:17,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:17,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-22 01:19:17,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [926244538] [2020-10-22 01:19:17,325 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:17,327 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:17,333 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-22 01:19:17,334 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:17,381 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7696#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 15))] [2020-10-22 01:19:17,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-22 01:19:17,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:17,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-22 01:19:17,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-10-22 01:19:17,383 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 18 states. [2020-10-22 01:19:18,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:18,174 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-10-22 01:19:18,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-22 01:19:18,175 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-22 01:19:18,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:18,176 INFO L225 Difference]: With dead ends: 112 [2020-10-22 01:19:18,176 INFO L226 Difference]: Without dead ends: 103 [2020-10-22 01:19:18,177 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 01:19:18,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-22 01:19:18,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-10-22 01:19:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-22 01:19:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-10-22 01:19:18,182 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 21 [2020-10-22 01:19:18,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:18,182 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-10-22 01:19:18,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-22 01:19:18,183 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-10-22 01:19:18,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-22 01:19:18,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:18,183 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:18,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:18,394 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:18,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:18,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1895992291, now seen corresponding path program 29 times [2020-10-22 01:19:18,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:18,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398730707] [2020-10-22 01:19:18,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:18,549 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 01:19:18,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398730707] [2020-10-22 01:19:18,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383093005] [2020-10-22 01:19:18,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:19:18,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-22 01:19:18,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:18,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-22 01:19:18,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:18,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:18,657 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 01:19:18,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:18,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-22 01:19:18,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [439329158] [2020-10-22 01:19:18,658 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:18,660 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:18,663 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 33 transitions. [2020-10-22 01:19:18,663 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:18,706 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:18,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-22 01:19:18,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:18,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-22 01:19:18,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-22 01:19:18,707 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 17 states. [2020-10-22 01:19:19,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:19,433 INFO L93 Difference]: Finished difference Result 96 states and 233 transitions. [2020-10-22 01:19:19,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-22 01:19:19,440 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-22 01:19:19,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:19,440 INFO L225 Difference]: With dead ends: 96 [2020-10-22 01:19:19,441 INFO L226 Difference]: Without dead ends: 91 [2020-10-22 01:19:19,442 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 01:19:19,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-22 01:19:19,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-10-22 01:19:19,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-22 01:19:19,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-22 01:19:19,445 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-22 01:19:19,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:19,445 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-22 01:19:19,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-22 01:19:19,445 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-22 01:19:19,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-22 01:19:19,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:19,446 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:19,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-22 01:19:19,648 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:19,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:19,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1242888800, now seen corresponding path program 30 times [2020-10-22 01:19:19,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:19,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658354045] [2020-10-22 01:19:19,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:19,867 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 01:19:19,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658354045] [2020-10-22 01:19:19,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784646141] [2020-10-22 01:19:19,868 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 01:19:19,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-22 01:19:19,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:19,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-22 01:19:19,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:19,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:19,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:19,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-22 01:19:19,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1656839115] [2020-10-22 01:19:19,963 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:19,965 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:19,970 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 37 transitions. [2020-10-22 01:19:19,970 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:19,974 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:19,974 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:20,035 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:20,035 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:20,066 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8428#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-22 01:19:20,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-22 01:19:20,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:20,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-22 01:19:20,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-22 01:19:20,067 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 19 states. [2020-10-22 01:19:20,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:20,499 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-22 01:19:20,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-22 01:19:20,499 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-22 01:19:20,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:20,501 INFO L225 Difference]: With dead ends: 96 [2020-10-22 01:19:20,501 INFO L226 Difference]: Without dead ends: 90 [2020-10-22 01:19:20,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2020-10-22 01:19:20,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-22 01:19:20,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-10-22 01:19:20,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-22 01:19:20,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-22 01:19:20,504 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 22 [2020-10-22 01:19:20,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:20,504 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-22 01:19:20,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-22 01:19:20,505 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-22 01:19:20,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-22 01:19:20,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:20,505 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:20,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:20,714 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:20,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:20,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1278252686, now seen corresponding path program 31 times [2020-10-22 01:19:20,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:20,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136715816] [2020-10-22 01:19:20,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:20,885 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 01:19:20,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136715816] [2020-10-22 01:19:20,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941308431] [2020-10-22 01:19:20,886 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 01:19:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:20,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-22 01:19:20,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:20,968 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:20,986 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 01:19:20,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:20,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-22 01:19:20,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [357809479] [2020-10-22 01:19:20,987 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:20,990 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:20,994 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 30 transitions. [2020-10-22 01:19:20,994 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:21,011 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:21,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-22 01:19:21,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:21,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-22 01:19:21,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-22 01:19:21,012 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 18 states. [2020-10-22 01:19:21,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:21,873 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-22 01:19:21,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-22 01:19:21,874 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-22 01:19:21,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:21,875 INFO L225 Difference]: With dead ends: 114 [2020-10-22 01:19:21,875 INFO L226 Difference]: Without dead ends: 109 [2020-10-22 01:19:21,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=716, Invalid=1540, Unknown=0, NotChecked=0, Total=2256 [2020-10-22 01:19:21,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-22 01:19:21,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 62. [2020-10-22 01:19:21,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-22 01:19:21,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 149 transitions. [2020-10-22 01:19:21,880 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 149 transitions. Word has length 22 [2020-10-22 01:19:21,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:21,881 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 149 transitions. [2020-10-22 01:19:21,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-22 01:19:21,881 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 149 transitions. [2020-10-22 01:19:21,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-22 01:19:21,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:21,882 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:22,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-22 01:19:22,092 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:22,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:22,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1353755908, now seen corresponding path program 32 times [2020-10-22 01:19:22,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:22,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609022808] [2020-10-22 01:19:22,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:22,289 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 01:19:22,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609022808] [2020-10-22 01:19:22,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003351618] [2020-10-22 01:19:22,290 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 01:19:22,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:19:22,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:22,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-22 01:19:22,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:22,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:22,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:22,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-22 01:19:22,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1307143246] [2020-10-22 01:19:22,414 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:22,416 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:22,421 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-22 01:19:22,421 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:22,490 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9171#(and (<= ~i~0 19) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:22,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-22 01:19:22,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:22,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-22 01:19:22,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-10-22 01:19:22,491 INFO L87 Difference]: Start difference. First operand 62 states and 149 transitions. Second operand 19 states. [2020-10-22 01:19:23,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:23,331 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-10-22 01:19:23,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-22 01:19:23,331 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-22 01:19:23,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:23,333 INFO L225 Difference]: With dead ends: 122 [2020-10-22 01:19:23,333 INFO L226 Difference]: Without dead ends: 113 [2020-10-22 01:19:23,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=661, Invalid=1501, Unknown=0, NotChecked=0, Total=2162 [2020-10-22 01:19:23,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-22 01:19:23,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2020-10-22 01:19:23,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-22 01:19:23,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-22 01:19:23,337 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 22 [2020-10-22 01:19:23,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:23,338 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-22 01:19:23,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-22 01:19:23,338 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-22 01:19:23,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-22 01:19:23,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:23,338 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:23,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:23,550 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:23,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:23,550 INFO L82 PathProgramCache]: Analyzing trace with hash -971102387, now seen corresponding path program 33 times [2020-10-22 01:19:23,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:23,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992135559] [2020-10-22 01:19:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:23,778 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 01:19:23,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992135559] [2020-10-22 01:19:23,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185711601] [2020-10-22 01:19:23,779 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 01:19:23,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-22 01:19:23,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:23,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-22 01:19:23,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:23,916 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:23,933 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 01:19:23,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:23,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-22 01:19:23,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [378302021] [2020-10-22 01:19:23,934 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:23,936 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:23,942 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-22 01:19:23,942 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:23,981 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9590#(and (<= ~i~0 17) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:23,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-22 01:19:23,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:23,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-22 01:19:23,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-10-22 01:19:23,983 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 20 states. [2020-10-22 01:19:24,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:24,917 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-10-22 01:19:24,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-22 01:19:24,922 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-22 01:19:24,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:24,923 INFO L225 Difference]: With dead ends: 122 [2020-10-22 01:19:24,923 INFO L226 Difference]: Without dead ends: 113 [2020-10-22 01:19:24,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=826, Invalid=1826, Unknown=0, NotChecked=0, Total=2652 [2020-10-22 01:19:24,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-22 01:19:24,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2020-10-22 01:19:24,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-22 01:19:24,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-10-22 01:19:24,928 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 23 [2020-10-22 01:19:24,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:24,928 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-10-22 01:19:24,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-22 01:19:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-10-22 01:19:24,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-22 01:19:24,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:24,929 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:25,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-22 01:19:25,139 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:25,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:25,139 INFO L82 PathProgramCache]: Analyzing trace with hash 983267910, now seen corresponding path program 34 times [2020-10-22 01:19:25,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:25,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499364486] [2020-10-22 01:19:25,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:25,292 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 01:19:25,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499364486] [2020-10-22 01:19:25,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261371483] [2020-10-22 01:19:25,293 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 01:19:25,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:19:25,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:25,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-22 01:19:25,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:25,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:25,407 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 01:19:25,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:25,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-22 01:19:25,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [464795735] [2020-10-22 01:19:25,408 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:25,410 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:25,415 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 35 transitions. [2020-10-22 01:19:25,415 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:25,461 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:25,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-22 01:19:25,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:25,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-22 01:19:25,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-22 01:19:25,462 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 19 states. [2020-10-22 01:19:26,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:26,357 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-10-22 01:19:26,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-22 01:19:26,358 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-22 01:19:26,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:26,359 INFO L225 Difference]: With dead ends: 104 [2020-10-22 01:19:26,360 INFO L226 Difference]: Without dead ends: 99 [2020-10-22 01:19:26,361 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 01:19:26,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-22 01:19:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-10-22 01:19:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-22 01:19:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-22 01:19:26,364 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-22 01:19:26,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:26,364 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-22 01:19:26,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-22 01:19:26,364 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-22 01:19:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-22 01:19:26,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:26,365 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:26,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-22 01:19:26,577 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:26,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:26,577 INFO L82 PathProgramCache]: Analyzing trace with hash 415234755, now seen corresponding path program 35 times [2020-10-22 01:19:26,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:26,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965838162] [2020-10-22 01:19:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:26,863 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 01:19:26,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965838162] [2020-10-22 01:19:26,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999414434] [2020-10-22 01:19:26,864 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 01:19:26,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-22 01:19:26,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:26,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-22 01:19:26,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:26,958 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:26,974 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 01:19:26,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:26,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-22 01:19:26,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2018910463] [2020-10-22 01:19:26,975 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:26,978 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:26,985 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 39 transitions. [2020-10-22 01:19:26,986 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:26,995 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:26,995 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:27,061 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:27,064 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:27,099 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10392#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-22 01:19:27,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-22 01:19:27,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:27,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-22 01:19:27,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-22 01:19:27,100 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 21 states. [2020-10-22 01:19:27,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:27,612 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-10-22 01:19:27,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-22 01:19:27,612 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-22 01:19:27,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:27,613 INFO L225 Difference]: With dead ends: 104 [2020-10-22 01:19:27,614 INFO L226 Difference]: Without dead ends: 98 [2020-10-22 01:19:27,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=460, Invalid=1022, Unknown=0, NotChecked=0, Total=1482 [2020-10-22 01:19:27,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-22 01:19:27,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-22 01:19:27,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-22 01:19:27,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-22 01:19:27,618 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 24 [2020-10-22 01:19:27,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:27,618 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-22 01:19:27,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-22 01:19:27,618 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-22 01:19:27,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-22 01:19:27,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:27,619 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:27,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-22 01:19:27,828 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:27,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:27,828 INFO L82 PathProgramCache]: Analyzing trace with hash -39374827, now seen corresponding path program 36 times [2020-10-22 01:19:27,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:27,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456551606] [2020-10-22 01:19:27,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:28,010 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 01:19:28,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456551606] [2020-10-22 01:19:28,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063483919] [2020-10-22 01:19:28,011 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 01:19:28,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-22 01:19:28,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:28,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-22 01:19:28,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:28,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:28,127 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 01:19:28,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:28,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-22 01:19:28,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [961965014] [2020-10-22 01:19:28,128 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:28,131 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:28,135 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 32 transitions. [2020-10-22 01:19:28,136 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:28,155 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:28,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-22 01:19:28,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:28,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-22 01:19:28,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-22 01:19:28,157 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 20 states. [2020-10-22 01:19:29,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:29,153 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-22 01:19:29,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-22 01:19:29,153 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-22 01:19:29,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:29,155 INFO L225 Difference]: With dead ends: 124 [2020-10-22 01:19:29,155 INFO L226 Difference]: Without dead ends: 119 [2020-10-22 01:19:29,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=1957, Unknown=0, NotChecked=0, Total=2862 [2020-10-22 01:19:29,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-22 01:19:29,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 66. [2020-10-22 01:19:29,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-22 01:19:29,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 159 transitions. [2020-10-22 01:19:29,159 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 159 transitions. Word has length 24 [2020-10-22 01:19:29,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:29,159 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 159 transitions. [2020-10-22 01:19:29,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-22 01:19:29,160 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 159 transitions. [2020-10-22 01:19:29,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-22 01:19:29,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:29,160 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:29,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-22 01:19:29,361 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:29,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:29,362 INFO L82 PathProgramCache]: Analyzing trace with hash 416559353, now seen corresponding path program 37 times [2020-10-22 01:19:29,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:29,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027993588] [2020-10-22 01:19:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:29,558 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 01:19:29,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027993588] [2020-10-22 01:19:29,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795018327] [2020-10-22 01:19:29,559 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 01:19:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:29,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-22 01:19:29,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:29,657 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:29,672 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 01:19:29,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:29,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-22 01:19:29,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [440104852] [2020-10-22 01:19:29,673 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:29,675 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:29,681 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-22 01:19:29,682 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:29,748 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11201#(and (<= ~i~0 21) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:29,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-22 01:19:29,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:29,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-22 01:19:29,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2020-10-22 01:19:29,749 INFO L87 Difference]: Start difference. First operand 66 states and 159 transitions. Second operand 21 states. [2020-10-22 01:19:30,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:30,800 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-10-22 01:19:30,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-22 01:19:30,800 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-22 01:19:30,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:30,802 INFO L225 Difference]: With dead ends: 132 [2020-10-22 01:19:30,802 INFO L226 Difference]: Without dead ends: 123 [2020-10-22 01:19:30,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=842, Invalid=1914, Unknown=0, NotChecked=0, Total=2756 [2020-10-22 01:19:30,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-22 01:19:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 84. [2020-10-22 01:19:30,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-22 01:19:30,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-22 01:19:30,807 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 24 [2020-10-22 01:19:30,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:30,807 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-22 01:19:30,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-22 01:19:30,807 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-22 01:19:30,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-22 01:19:30,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:30,808 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:31,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-22 01:19:31,019 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:31,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:31,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1220594422, now seen corresponding path program 38 times [2020-10-22 01:19:31,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:31,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821820795] [2020-10-22 01:19:31,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:31,214 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 01:19:31,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821820795] [2020-10-22 01:19:31,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055512651] [2020-10-22 01:19:31,215 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 01:19:31,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:19:31,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:31,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-22 01:19:31,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:31,363 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 01:19:31,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:31,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-22 01:19:31,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1599075809] [2020-10-22 01:19:31,365 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:31,370 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:31,380 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-22 01:19:31,380 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:31,434 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11658#(and (<= ~i~0 19) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:31,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-22 01:19:31,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:31,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-22 01:19:31,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:19:31,436 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 22 states. [2020-10-22 01:19:32,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:32,758 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-10-22 01:19:32,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-22 01:19:32,759 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-22 01:19:32,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:32,760 INFO L225 Difference]: With dead ends: 132 [2020-10-22 01:19:32,760 INFO L226 Difference]: Without dead ends: 123 [2020-10-22 01:19:32,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1028, Invalid=2278, Unknown=0, NotChecked=0, Total=3306 [2020-10-22 01:19:32,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-22 01:19:32,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 65. [2020-10-22 01:19:32,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-22 01:19:32,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-10-22 01:19:32,764 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 25 [2020-10-22 01:19:32,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:32,765 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-10-22 01:19:32,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-22 01:19:32,765 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-10-22 01:19:32,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-22 01:19:32,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:32,765 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:32,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-22 01:19:32,966 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:32,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:32,967 INFO L82 PathProgramCache]: Analyzing trace with hash 28466153, now seen corresponding path program 39 times [2020-10-22 01:19:32,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:32,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266922366] [2020-10-22 01:19:32,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:33,187 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 01:19:33,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266922366] [2020-10-22 01:19:33,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89390776] [2020-10-22 01:19:33,188 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 01:19:33,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-22 01:19:33,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:33,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-22 01:19:33,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:33,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:33,317 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 01:19:33,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:33,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-22 01:19:33,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [968874516] [2020-10-22 01:19:33,318 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:33,321 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:33,327 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 37 transitions. [2020-10-22 01:19:33,327 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:33,376 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:33,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-22 01:19:33,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:33,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-22 01:19:33,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-22 01:19:33,377 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 21 states. [2020-10-22 01:19:34,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:34,714 INFO L93 Difference]: Finished difference Result 112 states and 273 transitions. [2020-10-22 01:19:34,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-22 01:19:34,715 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-22 01:19:34,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:34,716 INFO L225 Difference]: With dead ends: 112 [2020-10-22 01:19:34,716 INFO L226 Difference]: Without dead ends: 107 [2020-10-22 01:19:34,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=922, Invalid=2048, Unknown=0, NotChecked=0, Total=2970 [2020-10-22 01:19:34,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-22 01:19:34,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-10-22 01:19:34,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-22 01:19:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-22 01:19:34,722 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-22 01:19:34,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:34,723 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-22 01:19:34,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-22 01:19:34,724 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-22 01:19:34,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-22 01:19:34,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:34,724 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:34,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-22 01:19:34,935 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:34,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:34,936 INFO L82 PathProgramCache]: Analyzing trace with hash -391352730, now seen corresponding path program 40 times [2020-10-22 01:19:34,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:34,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612011085] [2020-10-22 01:19:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:35,281 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 01:19:35,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612011085] [2020-10-22 01:19:35,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132685693] [2020-10-22 01:19:35,282 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 01:19:35,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:19:35,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:35,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-22 01:19:35,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:35,346 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:35,364 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 01:19:35,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:35,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-22 01:19:35,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1134843270] [2020-10-22 01:19:35,365 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:35,368 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:35,375 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 41 transitions. [2020-10-22 01:19:35,375 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:35,420 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:35,420 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:35,452 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:35,452 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:35,484 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12530#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-22 01:19:35,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-22 01:19:35,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:35,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-22 01:19:35,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:19:35,486 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 23 states. [2020-10-22 01:19:36,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:36,075 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-22 01:19:36,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-22 01:19:36,076 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-22 01:19:36,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:36,077 INFO L225 Difference]: With dead ends: 112 [2020-10-22 01:19:36,077 INFO L226 Difference]: Without dead ends: 106 [2020-10-22 01:19:36,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=560, Invalid=1246, Unknown=0, NotChecked=0, Total=1806 [2020-10-22 01:19:36,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-22 01:19:36,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2020-10-22 01:19:36,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-22 01:19:36,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-10-22 01:19:36,084 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 26 [2020-10-22 01:19:36,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:36,084 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-10-22 01:19:36,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-22 01:19:36,084 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-10-22 01:19:36,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-22 01:19:36,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:36,085 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:36,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:36,296 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:36,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:36,296 INFO L82 PathProgramCache]: Analyzing trace with hash 816306680, now seen corresponding path program 41 times [2020-10-22 01:19:36,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:36,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452213234] [2020-10-22 01:19:36,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:36,538 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 01:19:36,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452213234] [2020-10-22 01:19:36,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914940319] [2020-10-22 01:19:36,539 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 01:19:36,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-22 01:19:36,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:36,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-22 01:19:36,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:36,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:36,708 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 01:19:36,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:36,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-22 01:19:36,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [929766074] [2020-10-22 01:19:36,709 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:36,715 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:36,724 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 34 transitions. [2020-10-22 01:19:36,724 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:36,755 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:36,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-22 01:19:36,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:36,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-22 01:19:36,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-22 01:19:36,756 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 22 states. [2020-10-22 01:19:38,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:38,000 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-22 01:19:38,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-22 01:19:38,001 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-22 01:19:38,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:38,002 INFO L225 Difference]: With dead ends: 134 [2020-10-22 01:19:38,002 INFO L226 Difference]: Without dead ends: 129 [2020-10-22 01:19:38,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1116, Invalid=2424, Unknown=0, NotChecked=0, Total=3540 [2020-10-22 01:19:38,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-22 01:19:38,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 70. [2020-10-22 01:19:38,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-22 01:19:38,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 169 transitions. [2020-10-22 01:19:38,006 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 169 transitions. Word has length 26 [2020-10-22 01:19:38,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:38,007 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 169 transitions. [2020-10-22 01:19:38,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-22 01:19:38,007 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 169 transitions. [2020-10-22 01:19:38,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-22 01:19:38,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:38,008 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:38,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:38,216 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:38,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:38,216 INFO L82 PathProgramCache]: Analyzing trace with hash 882475958, now seen corresponding path program 42 times [2020-10-22 01:19:38,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:38,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332950378] [2020-10-22 01:19:38,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:38,465 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 01:19:38,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332950378] [2020-10-22 01:19:38,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646640947] [2020-10-22 01:19:38,468 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 01:19:38,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-22 01:19:38,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:38,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-22 01:19:38,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:38,602 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 01:19:38,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:38,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-22 01:19:38,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [926555418] [2020-10-22 01:19:38,603 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:38,607 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:38,614 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-22 01:19:38,614 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:38,693 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13405#(and (<= ~i~0 23) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:38,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-22 01:19:38,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:38,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-22 01:19:38,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-10-22 01:19:38,694 INFO L87 Difference]: Start difference. First operand 70 states and 169 transitions. Second operand 23 states. [2020-10-22 01:19:39,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:39,931 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-10-22 01:19:39,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-22 01:19:39,932 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-22 01:19:39,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:39,933 INFO L225 Difference]: With dead ends: 142 [2020-10-22 01:19:39,933 INFO L226 Difference]: Without dead ends: 133 [2020-10-22 01:19:39,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1045, Invalid=2377, Unknown=0, NotChecked=0, Total=3422 [2020-10-22 01:19:39,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-22 01:19:39,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 90. [2020-10-22 01:19:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-22 01:19:39,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 229 transitions. [2020-10-22 01:19:39,939 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 229 transitions. Word has length 26 [2020-10-22 01:19:39,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:39,939 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 229 transitions. [2020-10-22 01:19:39,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-22 01:19:39,940 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 229 transitions. [2020-10-22 01:19:39,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-22 01:19:39,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:39,941 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:40,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:40,152 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:40,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:40,153 INFO L82 PathProgramCache]: Analyzing trace with hash -464271481, now seen corresponding path program 43 times [2020-10-22 01:19:40,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:40,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109602506] [2020-10-22 01:19:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:40,406 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 01:19:40,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109602506] [2020-10-22 01:19:40,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064584426] [2020-10-22 01:19:40,407 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 01:19:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:40,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-22 01:19:40,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:40,496 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:40,514 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 01:19:40,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:40,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-22 01:19:40,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [81769734] [2020-10-22 01:19:40,515 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:40,518 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:40,523 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-22 01:19:40,523 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:40,581 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13900#(and (<= ~i~0 21) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:40,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-22 01:19:40,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:40,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-22 01:19:40,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-10-22 01:19:40,585 INFO L87 Difference]: Start difference. First operand 90 states and 229 transitions. Second operand 24 states. [2020-10-22 01:19:41,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:41,833 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-10-22 01:19:41,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-22 01:19:41,834 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-22 01:19:41,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:41,835 INFO L225 Difference]: With dead ends: 142 [2020-10-22 01:19:41,835 INFO L226 Difference]: Without dead ends: 133 [2020-10-22 01:19:41,836 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 01:19:41,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-22 01:19:41,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 69. [2020-10-22 01:19:41,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-22 01:19:41,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-10-22 01:19:41,839 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 27 [2020-10-22 01:19:41,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:41,839 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-10-22 01:19:41,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-22 01:19:41,839 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-10-22 01:19:41,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-22 01:19:41,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:41,840 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:42,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-22 01:19:42,051 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:42,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:42,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1586979020, now seen corresponding path program 44 times [2020-10-22 01:19:42,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:42,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242377226] [2020-10-22 01:19:42,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:42,304 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 01:19:42,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242377226] [2020-10-22 01:19:42,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39125493] [2020-10-22 01:19:42,305 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 01:19:42,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:19:42,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:42,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-22 01:19:42,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:42,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:42,444 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 01:19:42,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:42,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-22 01:19:42,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1390171204] [2020-10-22 01:19:42,445 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:42,447 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:42,453 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 39 transitions. [2020-10-22 01:19:42,453 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:42,502 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:42,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-22 01:19:42,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:42,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-22 01:19:42,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-22 01:19:42,503 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 23 states. [2020-10-22 01:19:43,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:43,740 INFO L93 Difference]: Finished difference Result 120 states and 293 transitions. [2020-10-22 01:19:43,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-22 01:19:43,741 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-22 01:19:43,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:43,742 INFO L225 Difference]: With dead ends: 120 [2020-10-22 01:19:43,743 INFO L226 Difference]: Without dead ends: 115 [2020-10-22 01:19:43,743 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 01:19:43,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-22 01:19:43,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-10-22 01:19:43,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-22 01:19:43,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-22 01:19:43,747 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-22 01:19:43,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:43,747 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-22 01:19:43,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-22 01:19:43,747 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-22 01:19:43,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-22 01:19:43,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:43,748 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:43,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:43,960 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:43,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:43,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1867154761, now seen corresponding path program 45 times [2020-10-22 01:19:43,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:43,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494859639] [2020-10-22 01:19:43,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:44,347 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 01:19:44,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494859639] [2020-10-22 01:19:44,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225706920] [2020-10-22 01:19:44,348 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 01:19:44,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-22 01:19:44,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:44,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-22 01:19:44,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:44,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:44,430 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 01:19:44,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:44,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-22 01:19:44,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [566885648] [2020-10-22 01:19:44,431 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:44,433 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:44,439 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 43 transitions. [2020-10-22 01:19:44,439 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:44,473 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:44,473 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:44,511 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:44,511 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:44,537 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:44,537 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:44,538 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14842#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-22 01:19:44,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-22 01:19:44,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:44,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-22 01:19:44,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-10-22 01:19:44,539 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 25 states. [2020-10-22 01:19:45,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:45,211 INFO L93 Difference]: Finished difference Result 120 states and 291 transitions. [2020-10-22 01:19:45,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-22 01:19:45,212 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-22 01:19:45,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:45,213 INFO L225 Difference]: With dead ends: 120 [2020-10-22 01:19:45,213 INFO L226 Difference]: Without dead ends: 114 [2020-10-22 01:19:45,214 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 01:19:45,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-22 01:19:45,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 95. [2020-10-22 01:19:45,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-22 01:19:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 241 transitions. [2020-10-22 01:19:45,217 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 241 transitions. Word has length 28 [2020-10-22 01:19:45,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:45,218 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 241 transitions. [2020-10-22 01:19:45,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-22 01:19:45,218 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 241 transitions. [2020-10-22 01:19:45,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-22 01:19:45,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:45,219 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:45,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:45,430 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:45,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:45,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1507485925, now seen corresponding path program 46 times [2020-10-22 01:19:45,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:45,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189670199] [2020-10-22 01:19:45,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:45,705 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 01:19:45,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189670199] [2020-10-22 01:19:45,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188133610] [2020-10-22 01:19:45,706 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 01:19:45,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:19:45,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:45,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-22 01:19:45,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:45,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:45,824 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 01:19:45,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:45,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-22 01:19:45,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2011058556] [2020-10-22 01:19:45,825 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:45,829 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:45,835 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 36 transitions. [2020-10-22 01:19:45,835 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:45,854 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:45,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-22 01:19:45,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:45,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-22 01:19:45,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-22 01:19:45,855 INFO L87 Difference]: Start difference. First operand 95 states and 241 transitions. Second operand 24 states. [2020-10-22 01:19:47,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:47,209 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-10-22 01:19:47,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-22 01:19:47,210 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-22 01:19:47,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:47,211 INFO L225 Difference]: With dead ends: 144 [2020-10-22 01:19:47,212 INFO L226 Difference]: Without dead ends: 139 [2020-10-22 01:19:47,212 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 01:19:47,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-22 01:19:47,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 74. [2020-10-22 01:19:47,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-22 01:19:47,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-22 01:19:47,218 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 28 [2020-10-22 01:19:47,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:47,218 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-22 01:19:47,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-22 01:19:47,218 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-22 01:19:47,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-22 01:19:47,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:47,219 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:47,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-22 01:19:47,426 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:47,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:47,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1951734579, now seen corresponding path program 47 times [2020-10-22 01:19:47,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:47,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752181479] [2020-10-22 01:19:47,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:47,769 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 01:19:47,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752181479] [2020-10-22 01:19:47,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915211976] [2020-10-22 01:19:47,770 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 01:19:47,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-22 01:19:47,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:47,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-22 01:19:47,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:47,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:47,941 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 01:19:47,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:47,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-22 01:19:47,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1989357774] [2020-10-22 01:19:47,943 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:47,949 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:47,962 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-22 01:19:47,962 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:48,075 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15783#(and (<= ~i~0 25) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:48,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-22 01:19:48,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:48,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-22 01:19:48,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-10-22 01:19:48,076 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 25 states. [2020-10-22 01:19:49,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:49,834 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-10-22 01:19:49,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-22 01:19:49,834 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-22 01:19:49,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:49,835 INFO L225 Difference]: With dead ends: 152 [2020-10-22 01:19:49,836 INFO L226 Difference]: Without dead ends: 143 [2020-10-22 01:19:49,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1270, Invalid=2890, Unknown=0, NotChecked=0, Total=4160 [2020-10-22 01:19:49,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-22 01:19:49,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 96. [2020-10-22 01:19:49,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-22 01:19:49,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 245 transitions. [2020-10-22 01:19:49,839 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 245 transitions. Word has length 28 [2020-10-22 01:19:49,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:49,839 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 245 transitions. [2020-10-22 01:19:49,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-22 01:19:49,839 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 245 transitions. [2020-10-22 01:19:49,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-22 01:19:49,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:49,840 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:50,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-22 01:19:50,041 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:50,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:50,041 INFO L82 PathProgramCache]: Analyzing trace with hash 512601796, now seen corresponding path program 48 times [2020-10-22 01:19:50,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:50,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969420147] [2020-10-22 01:19:50,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:50,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969420147] [2020-10-22 01:19:50,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125808909] [2020-10-22 01:19:50,355 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 01:19:50,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-22 01:19:50,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:50,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-22 01:19:50,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:50,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:50,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-22 01:19:50,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1892242025] [2020-10-22 01:19:50,490 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:50,493 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:50,500 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-10-22 01:19:50,500 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:50,545 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16316#(and (<= ~i~0 23) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:19:50,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-22 01:19:50,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:50,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-22 01:19:50,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-10-22 01:19:50,547 INFO L87 Difference]: Start difference. First operand 96 states and 245 transitions. Second operand 26 states. [2020-10-22 01:19:52,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:52,106 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-10-22 01:19:52,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-22 01:19:52,107 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-22 01:19:52,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:52,109 INFO L225 Difference]: With dead ends: 152 [2020-10-22 01:19:52,109 INFO L226 Difference]: Without dead ends: 143 [2020-10-22 01:19:52,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1498, Invalid=3332, Unknown=0, NotChecked=0, Total=4830 [2020-10-22 01:19:52,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-22 01:19:52,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 73. [2020-10-22 01:19:52,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-22 01:19:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 177 transitions. [2020-10-22 01:19:52,112 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 177 transitions. Word has length 29 [2020-10-22 01:19:52,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:52,113 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 177 transitions. [2020-10-22 01:19:52,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-22 01:19:52,113 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 177 transitions. [2020-10-22 01:19:52,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-22 01:19:52,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:52,113 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:52,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-22 01:19:52,314 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:52,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:52,315 INFO L82 PathProgramCache]: Analyzing trace with hash 374257903, now seen corresponding path program 49 times [2020-10-22 01:19:52,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:52,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528106476] [2020-10-22 01:19:52,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:52,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528106476] [2020-10-22 01:19:52,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986306567] [2020-10-22 01:19:52,647 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 01:19:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:52,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-22 01:19:52,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:52,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:52,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:52,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-22 01:19:52,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1152774074] [2020-10-22 01:19:52,764 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:52,767 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:52,774 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 41 transitions. [2020-10-22 01:19:52,775 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:52,825 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:52,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-22 01:19:52,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:52,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-22 01:19:52,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-10-22 01:19:52,826 INFO L87 Difference]: Start difference. First operand 73 states and 177 transitions. Second operand 25 states. [2020-10-22 01:19:54,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:54,338 INFO L93 Difference]: Finished difference Result 128 states and 313 transitions. [2020-10-22 01:19:54,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-22 01:19:54,339 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-22 01:19:54,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:54,341 INFO L225 Difference]: With dead ends: 128 [2020-10-22 01:19:54,341 INFO L226 Difference]: Without dead ends: 123 [2020-10-22 01:19:54,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1368, Invalid=3054, Unknown=0, NotChecked=0, Total=4422 [2020-10-22 01:19:54,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-22 01:19:54,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 97. [2020-10-22 01:19:54,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-22 01:19:54,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-10-22 01:19:54,344 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-10-22 01:19:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:54,344 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-10-22 01:19:54,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-22 01:19:54,344 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-10-22 01:19:54,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-22 01:19:54,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:54,345 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:54,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:54,546 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:54,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:54,546 INFO L82 PathProgramCache]: Analyzing trace with hash -960598164, now seen corresponding path program 50 times [2020-10-22 01:19:54,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:54,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649586475] [2020-10-22 01:19:54,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:54,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649586475] [2020-10-22 01:19:54,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219196359] [2020-10-22 01:19:54,975 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:55,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:19:55,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:55,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-22 01:19:55,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:55,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:55,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:55,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-22 01:19:55,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [498480325] [2020-10-22 01:19:55,071 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:55,075 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:55,087 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 45 transitions. [2020-10-22 01:19:55,087 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:55,108 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:19:55,108 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:19:55,217 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17328#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-22 01:19:55,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-22 01:19:55,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:55,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-22 01:19:55,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-10-22 01:19:55,218 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 27 states. [2020-10-22 01:19:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:56,066 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-10-22 01:19:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-22 01:19:56,066 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-22 01:19:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:56,068 INFO L225 Difference]: With dead ends: 128 [2020-10-22 01:19:56,068 INFO L226 Difference]: Without dead ends: 122 [2020-10-22 01:19:56,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=790, Invalid=1760, Unknown=0, NotChecked=0, Total=2550 [2020-10-22 01:19:56,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-22 01:19:56,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2020-10-22 01:19:56,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-22 01:19:56,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 257 transitions. [2020-10-22 01:19:56,072 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 257 transitions. Word has length 30 [2020-10-22 01:19:56,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:56,072 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 257 transitions. [2020-10-22 01:19:56,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-22 01:19:56,073 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 257 transitions. [2020-10-22 01:19:56,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-22 01:19:56,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:56,073 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:56,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:56,281 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:56,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:56,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1289185410, now seen corresponding path program 51 times [2020-10-22 01:19:56,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:56,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652082028] [2020-10-22 01:19:56,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:56,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652082028] [2020-10-22 01:19:56,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445452393] [2020-10-22 01:19:56,579 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:56,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-22 01:19:56,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:56,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-22 01:19:56,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:56,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:19:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:56,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:56,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-22 01:19:56,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [862207010] [2020-10-22 01:19:56,714 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:56,718 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:56,724 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 38 transitions. [2020-10-22 01:19:56,725 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:56,750 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:19:56,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-22 01:19:56,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:56,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-22 01:19:56,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-10-22 01:19:56,751 INFO L87 Difference]: Start difference. First operand 101 states and 257 transitions. Second operand 26 states. [2020-10-22 01:19:58,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:19:58,329 INFO L93 Difference]: Finished difference Result 154 states and 367 transitions. [2020-10-22 01:19:58,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-22 01:19:58,329 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-22 01:19:58,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:19:58,331 INFO L225 Difference]: With dead ends: 154 [2020-10-22 01:19:58,331 INFO L226 Difference]: Without dead ends: 149 [2020-10-22 01:19:58,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1604, Invalid=3508, Unknown=0, NotChecked=0, Total=5112 [2020-10-22 01:19:58,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-22 01:19:58,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 78. [2020-10-22 01:19:58,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-22 01:19:58,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 189 transitions. [2020-10-22 01:19:58,335 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 189 transitions. Word has length 30 [2020-10-22 01:19:58,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:19:58,335 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 189 transitions. [2020-10-22 01:19:58,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-22 01:19:58,335 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 189 transitions. [2020-10-22 01:19:58,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-22 01:19:58,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:19:58,336 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:19:58,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-10-22 01:19:58,541 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:19:58,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:19:58,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1282881680, now seen corresponding path program 52 times [2020-10-22 01:19:58,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:19:58,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761306672] [2020-10-22 01:19:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:19:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:19:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:58,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761306672] [2020-10-22 01:19:58,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436242923] [2020-10-22 01:19:58,882 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:19:58,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:19:58,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:19:58,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-22 01:19:58,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:19:59,045 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:19:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:19:59,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:19:59,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-22 01:19:59,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1714141052] [2020-10-22 01:19:59,076 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:19:59,082 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:19:59,096 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-10-22 01:19:59,096 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:19:59,227 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18335#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 27))] [2020-10-22 01:19:59,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-22 01:19:59,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:19:59,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-22 01:19:59,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2020-10-22 01:19:59,229 INFO L87 Difference]: Start difference. First operand 78 states and 189 transitions. Second operand 27 states. [2020-10-22 01:20:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:20:00,997 INFO L93 Difference]: Finished difference Result 162 states and 385 transitions. [2020-10-22 01:20:00,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-22 01:20:00,998 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-22 01:20:00,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:20:00,999 INFO L225 Difference]: With dead ends: 162 [2020-10-22 01:20:00,999 INFO L226 Difference]: Without dead ends: 153 [2020-10-22 01:20:01,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1517, Invalid=3453, Unknown=0, NotChecked=0, Total=4970 [2020-10-22 01:20:01,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-22 01:20:01,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 102. [2020-10-22 01:20:01,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-22 01:20:01,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 261 transitions. [2020-10-22 01:20:01,004 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 261 transitions. Word has length 30 [2020-10-22 01:20:01,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:20:01,004 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 261 transitions. [2020-10-22 01:20:01,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-22 01:20:01,005 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 261 transitions. [2020-10-22 01:20:01,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-22 01:20:01,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:20:01,005 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:20:01,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:01,217 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:20:01,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:20:01,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1310016831, now seen corresponding path program 53 times [2020-10-22 01:20:01,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:20:01,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261873067] [2020-10-22 01:20:01,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:20:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:01,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261873067] [2020-10-22 01:20:01,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737458424] [2020-10-22 01:20:01,604 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:01,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-22 01:20:01,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:20:01,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-22 01:20:01,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:20:01,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:20:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:01,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:20:01,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-22 01:20:01,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [799471632] [2020-10-22 01:20:01,737 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:20:01,747 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:20:01,765 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-10-22 01:20:01,765 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:20:01,818 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18906#(and (<= ~i~0 25) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:20:01,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-22 01:20:01,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:20:01,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-22 01:20:01,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2020-10-22 01:20:01,819 INFO L87 Difference]: Start difference. First operand 102 states and 261 transitions. Second operand 28 states. [2020-10-22 01:20:03,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:20:03,545 INFO L93 Difference]: Finished difference Result 162 states and 385 transitions. [2020-10-22 01:20:03,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-22 01:20:03,545 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-22 01:20:03,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:20:03,547 INFO L225 Difference]: With dead ends: 162 [2020-10-22 01:20:03,547 INFO L226 Difference]: Without dead ends: 153 [2020-10-22 01:20:03,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1766, Invalid=3934, Unknown=0, NotChecked=0, Total=5700 [2020-10-22 01:20:03,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-22 01:20:03,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 77. [2020-10-22 01:20:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-22 01:20:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 187 transitions. [2020-10-22 01:20:03,550 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 187 transitions. Word has length 31 [2020-10-22 01:20:03,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:20:03,552 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 187 transitions. [2020-10-22 01:20:03,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-22 01:20:03,552 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 187 transitions. [2020-10-22 01:20:03,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-22 01:20:03,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:20:03,553 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:20:03,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-10-22 01:20:03,753 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:20:03,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:20:03,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1114598318, now seen corresponding path program 54 times [2020-10-22 01:20:03,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:20:03,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585300528] [2020-10-22 01:20:03,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:20:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:04,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585300528] [2020-10-22 01:20:04,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418555518] [2020-10-22 01:20:04,114 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:04,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-22 01:20:04,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:20:04,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-22 01:20:04,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:20:04,228 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:20:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:04,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:20:04,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-22 01:20:04,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1914488108] [2020-10-22 01:20:04,257 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:20:04,262 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:20:04,271 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 43 transitions. [2020-10-22 01:20:04,271 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:20:04,336 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:20:04,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-22 01:20:04,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:20:04,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-22 01:20:04,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-10-22 01:20:04,337 INFO L87 Difference]: Start difference. First operand 77 states and 187 transitions. Second operand 27 states. [2020-10-22 01:20:06,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:20:06,047 INFO L93 Difference]: Finished difference Result 136 states and 333 transitions. [2020-10-22 01:20:06,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-22 01:20:06,048 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-22 01:20:06,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:20:06,050 INFO L225 Difference]: With dead ends: 136 [2020-10-22 01:20:06,050 INFO L226 Difference]: Without dead ends: 131 [2020-10-22 01:20:06,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1624, Invalid=3632, Unknown=0, NotChecked=0, Total=5256 [2020-10-22 01:20:06,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-22 01:20:06,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2020-10-22 01:20:06,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-22 01:20:06,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-10-22 01:20:06,053 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-10-22 01:20:06,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:20:06,053 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-10-22 01:20:06,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-22 01:20:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-10-22 01:20:06,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-22 01:20:06,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:20:06,054 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:20:06,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-22 01:20:06,255 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:20:06,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:20:06,255 INFO L82 PathProgramCache]: Analyzing trace with hash 283139279, now seen corresponding path program 55 times [2020-10-22 01:20:06,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:20:06,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341413659] [2020-10-22 01:20:06,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:20:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:06,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341413659] [2020-10-22 01:20:06,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517826020] [2020-10-22 01:20:06,788 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:06,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-22 01:20:06,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:20:06,861 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:20:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:06,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:20:06,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-22 01:20:06,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [76364947] [2020-10-22 01:20:06,882 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:20:06,887 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:20:06,899 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 47 transitions. [2020-10-22 01:20:06,899 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:20:06,937 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:20:06,937 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:20:07,029 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19988#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-22 01:20:07,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-22 01:20:07,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:20:07,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-22 01:20:07,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-10-22 01:20:07,030 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 29 states. [2020-10-22 01:20:07,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:20:07,994 INFO L93 Difference]: Finished difference Result 136 states and 331 transitions. [2020-10-22 01:20:07,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-22 01:20:07,995 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-22 01:20:07,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:20:07,996 INFO L225 Difference]: With dead ends: 136 [2020-10-22 01:20:07,996 INFO L226 Difference]: Without dead ends: 130 [2020-10-22 01:20:07,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=920, Invalid=2050, Unknown=0, NotChecked=0, Total=2970 [2020-10-22 01:20:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-22 01:20:07,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 107. [2020-10-22 01:20:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-22 01:20:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 273 transitions. [2020-10-22 01:20:08,000 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 273 transitions. Word has length 32 [2020-10-22 01:20:08,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:20:08,000 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 273 transitions. [2020-10-22 01:20:08,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-22 01:20:08,000 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 273 transitions. [2020-10-22 01:20:08,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-22 01:20:08,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:20:08,000 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:20:08,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-22 01:20:08,202 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:20:08,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:20:08,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1955787999, now seen corresponding path program 56 times [2020-10-22 01:20:08,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:20:08,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189261141] [2020-10-22 01:20:08,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:20:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:08,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189261141] [2020-10-22 01:20:08,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890868541] [2020-10-22 01:20:08,632 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:08,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:20:08,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:20:08,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-22 01:20:08,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:20:08,739 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:20:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:08,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:20:08,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-22 01:20:08,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [109255025] [2020-10-22 01:20:08,765 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:20:08,769 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:20:08,780 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 40 transitions. [2020-10-22 01:20:08,780 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:20:08,802 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:20:08,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-22 01:20:08,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:20:08,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-22 01:20:08,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-10-22 01:20:08,803 INFO L87 Difference]: Start difference. First operand 107 states and 273 transitions. Second operand 28 states. [2020-10-22 01:20:10,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:20:10,669 INFO L93 Difference]: Finished difference Result 164 states and 391 transitions. [2020-10-22 01:20:10,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-22 01:20:10,670 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-22 01:20:10,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:20:10,672 INFO L225 Difference]: With dead ends: 164 [2020-10-22 01:20:10,672 INFO L226 Difference]: Without dead ends: 159 [2020-10-22 01:20:10,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1881, Invalid=4125, Unknown=0, NotChecked=0, Total=6006 [2020-10-22 01:20:10,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-22 01:20:10,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 82. [2020-10-22 01:20:10,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-22 01:20:10,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 199 transitions. [2020-10-22 01:20:10,680 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 199 transitions. Word has length 32 [2020-10-22 01:20:10,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:20:10,680 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 199 transitions. [2020-10-22 01:20:10,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-22 01:20:10,680 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 199 transitions. [2020-10-22 01:20:10,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-22 01:20:10,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:20:10,681 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:20:10,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-22 01:20:10,893 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:20:10,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:20:10,893 INFO L82 PathProgramCache]: Analyzing trace with hash -192784275, now seen corresponding path program 57 times [2020-10-22 01:20:10,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:20:10,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860755531] [2020-10-22 01:20:10,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:20:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:11,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860755531] [2020-10-22 01:20:11,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357249431] [2020-10-22 01:20:11,285 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:11,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-22 01:20:11,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:20:11,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-22 01:20:11,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:20:11,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:20:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:11,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:20:11,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-22 01:20:11,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1670499633] [2020-10-22 01:20:11,429 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:20:11,432 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:20:11,441 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-10-22 01:20:11,442 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:20:11,532 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21061#(and (<= ~i~0 29) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:20:11,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-22 01:20:11,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:20:11,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-22 01:20:11,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2020-10-22 01:20:11,533 INFO L87 Difference]: Start difference. First operand 82 states and 199 transitions. Second operand 29 states. [2020-10-22 01:20:13,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:20:13,455 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2020-10-22 01:20:13,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-22 01:20:13,456 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-22 01:20:13,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:20:13,457 INFO L225 Difference]: With dead ends: 172 [2020-10-22 01:20:13,457 INFO L226 Difference]: Without dead ends: 163 [2020-10-22 01:20:13,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1786, Invalid=4066, Unknown=0, NotChecked=0, Total=5852 [2020-10-22 01:20:13,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-22 01:20:13,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 108. [2020-10-22 01:20:13,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-22 01:20:13,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 277 transitions. [2020-10-22 01:20:13,461 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 277 transitions. Word has length 32 [2020-10-22 01:20:13,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:20:13,461 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 277 transitions. [2020-10-22 01:20:13,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-22 01:20:13,461 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 277 transitions. [2020-10-22 01:20:13,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-22 01:20:13,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:20:13,462 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:20:13,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:13,673 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:20:13,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:20:13,673 INFO L82 PathProgramCache]: Analyzing trace with hash -499860610, now seen corresponding path program 58 times [2020-10-22 01:20:13,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:20:13,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78812725] [2020-10-22 01:20:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:20:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:14,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78812725] [2020-10-22 01:20:14,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402442796] [2020-10-22 01:20:14,199 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:14,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:20:14,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:20:14,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-22 01:20:14,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:20:14,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:20:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:14,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:20:14,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-22 01:20:14,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [139930044] [2020-10-22 01:20:14,325 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:20:14,329 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:20:14,343 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-10-22 01:20:14,343 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:20:14,408 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21670#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 27))] [2020-10-22 01:20:14,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-22 01:20:14,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:20:14,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-22 01:20:14,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2020-10-22 01:20:14,410 INFO L87 Difference]: Start difference. First operand 108 states and 277 transitions. Second operand 30 states. [2020-10-22 01:20:16,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:20:16,475 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2020-10-22 01:20:16,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-22 01:20:16,476 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-22 01:20:16,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:20:16,478 INFO L225 Difference]: With dead ends: 172 [2020-10-22 01:20:16,478 INFO L226 Difference]: Without dead ends: 163 [2020-10-22 01:20:16,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1907 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2056, Invalid=4586, Unknown=0, NotChecked=0, Total=6642 [2020-10-22 01:20:16,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-22 01:20:16,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 81. [2020-10-22 01:20:16,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-22 01:20:16,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2020-10-22 01:20:16,482 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 33 [2020-10-22 01:20:16,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:20:16,482 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2020-10-22 01:20:16,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-22 01:20:16,482 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2020-10-22 01:20:16,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-22 01:20:16,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:20:16,483 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:20:16,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-22 01:20:16,695 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:20:16,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:20:16,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1681317131, now seen corresponding path program 59 times [2020-10-22 01:20:16,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:20:16,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477718986] [2020-10-22 01:20:16,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:20:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:17,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477718986] [2020-10-22 01:20:17,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560156946] [2020-10-22 01:20:17,142 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:17,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-22 01:20:17,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:20:17,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-22 01:20:17,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:20:17,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:20:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:17,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:20:17,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-22 01:20:17,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [376651722] [2020-10-22 01:20:17,287 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:20:17,290 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:20:17,299 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 45 transitions. [2020-10-22 01:20:17,300 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:20:17,343 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:20:17,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-22 01:20:17,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:20:17,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-22 01:20:17,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-10-22 01:20:17,344 INFO L87 Difference]: Start difference. First operand 81 states and 197 transitions. Second operand 29 states. [2020-10-22 01:20:19,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:20:19,375 INFO L93 Difference]: Finished difference Result 144 states and 353 transitions. [2020-10-22 01:20:19,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-22 01:20:19,376 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-22 01:20:19,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:20:19,377 INFO L225 Difference]: With dead ends: 144 [2020-10-22 01:20:19,377 INFO L226 Difference]: Without dead ends: 139 [2020-10-22 01:20:19,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1902, Invalid=4260, Unknown=0, NotChecked=0, Total=6162 [2020-10-22 01:20:19,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-22 01:20:19,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 109. [2020-10-22 01:20:19,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-22 01:20:19,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-10-22 01:20:19,381 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-10-22 01:20:19,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:20:19,381 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-10-22 01:20:19,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-22 01:20:19,381 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-10-22 01:20:19,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-22 01:20:19,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:20:19,382 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:20:19,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:19,590 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:20:19,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:20:19,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1513913714, now seen corresponding path program 60 times [2020-10-22 01:20:19,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:20:19,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89620160] [2020-10-22 01:20:19,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:20:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:20,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89620160] [2020-10-22 01:20:20,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700639040] [2020-10-22 01:20:20,224 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:20,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-22 01:20:20,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:20:20,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-22 01:20:20,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:20:20,308 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:20:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:20,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:20:20,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-22 01:20:20,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1611054586] [2020-10-22 01:20:20,322 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:20:20,327 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:20:20,339 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 49 transitions. [2020-10-22 01:20:20,340 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:20:20,368 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:20:20,368 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:20:20,458 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:20:20,459 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:20:20,487 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:20:20,488 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:20:20,489 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22822#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-22 01:20:20,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-22 01:20:20,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:20:20,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-22 01:20:20,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2020-10-22 01:20:20,490 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 31 states. [2020-10-22 01:20:21,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:20:21,503 INFO L93 Difference]: Finished difference Result 144 states and 351 transitions. [2020-10-22 01:20:21,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-22 01:20:21,504 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-22 01:20:21,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:20:21,505 INFO L225 Difference]: With dead ends: 144 [2020-10-22 01:20:21,505 INFO L226 Difference]: Without dead ends: 138 [2020-10-22 01:20:21,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1060, Invalid=2362, Unknown=0, NotChecked=0, Total=3422 [2020-10-22 01:20:21,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-22 01:20:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 113. [2020-10-22 01:20:21,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-22 01:20:21,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 289 transitions. [2020-10-22 01:20:21,508 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 289 transitions. Word has length 34 [2020-10-22 01:20:21,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:20:21,509 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 289 transitions. [2020-10-22 01:20:21,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-22 01:20:21,509 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 289 transitions. [2020-10-22 01:20:21,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-22 01:20:21,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:20:21,510 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:20:21,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-10-22 01:20:21,713 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:20:21,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:20:21,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1684218372, now seen corresponding path program 61 times [2020-10-22 01:20:21,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:20:21,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248165261] [2020-10-22 01:20:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:20:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:22,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248165261] [2020-10-22 01:20:22,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415010007] [2020-10-22 01:20:22,189 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:22,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:22,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-22 01:20:22,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:20:22,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:20:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:22,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:20:22,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-22 01:20:22,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1652946000] [2020-10-22 01:20:22,325 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:20:22,329 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:20:22,342 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 42 transitions. [2020-10-22 01:20:22,342 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:20:22,372 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:20:22,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-22 01:20:22,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:20:22,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-22 01:20:22,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2020-10-22 01:20:22,373 INFO L87 Difference]: Start difference. First operand 113 states and 289 transitions. Second operand 30 states. [2020-10-22 01:20:24,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:20:24,482 INFO L93 Difference]: Finished difference Result 174 states and 415 transitions. [2020-10-22 01:20:24,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-22 01:20:24,483 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-22 01:20:24,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:20:24,484 INFO L225 Difference]: With dead ends: 174 [2020-10-22 01:20:24,484 INFO L226 Difference]: Without dead ends: 169 [2020-10-22 01:20:24,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2180, Invalid=4792, Unknown=0, NotChecked=0, Total=6972 [2020-10-22 01:20:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-22 01:20:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 86. [2020-10-22 01:20:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-22 01:20:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 209 transitions. [2020-10-22 01:20:24,487 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 209 transitions. Word has length 34 [2020-10-22 01:20:24,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:20:24,487 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 209 transitions. [2020-10-22 01:20:24,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-22 01:20:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 209 transitions. [2020-10-22 01:20:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-22 01:20:24,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:20:24,488 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:20:24,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:24,689 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:20:24,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:20:24,689 INFO L82 PathProgramCache]: Analyzing trace with hash -581198294, now seen corresponding path program 62 times [2020-10-22 01:20:24,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:20:24,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389624887] [2020-10-22 01:20:24,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:20:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:25,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389624887] [2020-10-22 01:20:25,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337340881] [2020-10-22 01:20:25,173 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:25,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:20:25,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:20:25,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-22 01:20:25,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:20:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:25,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:20:25,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-22 01:20:25,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1064328139] [2020-10-22 01:20:25,311 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:20:25,314 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:20:25,325 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-10-22 01:20:25,325 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:20:25,409 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23961#(and (<= ~i~0 31) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:20:25,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-22 01:20:25,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:20:25,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-22 01:20:25,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2020-10-22 01:20:25,410 INFO L87 Difference]: Start difference. First operand 86 states and 209 transitions. Second operand 31 states. [2020-10-22 01:20:27,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:20:27,597 INFO L93 Difference]: Finished difference Result 182 states and 433 transitions. [2020-10-22 01:20:27,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-22 01:20:27,598 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-22 01:20:27,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:20:27,599 INFO L225 Difference]: With dead ends: 182 [2020-10-22 01:20:27,600 INFO L226 Difference]: Without dead ends: 173 [2020-10-22 01:20:27,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2077, Invalid=4729, Unknown=0, NotChecked=0, Total=6806 [2020-10-22 01:20:27,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-22 01:20:27,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 114. [2020-10-22 01:20:27,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-22 01:20:27,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 293 transitions. [2020-10-22 01:20:27,603 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 293 transitions. Word has length 34 [2020-10-22 01:20:27,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:20:27,604 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 293 transitions. [2020-10-22 01:20:27,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-22 01:20:27,604 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 293 transitions. [2020-10-22 01:20:27,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-22 01:20:27,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:20:27,605 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:20:27,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-10-22 01:20:27,809 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:20:27,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:20:27,809 INFO L82 PathProgramCache]: Analyzing trace with hash 671187195, now seen corresponding path program 63 times [2020-10-22 01:20:27,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:20:27,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731397474] [2020-10-22 01:20:27,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:20:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:28,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731397474] [2020-10-22 01:20:28,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616913357] [2020-10-22 01:20:28,317 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:28,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-10-22 01:20:28,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:20:28,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-22 01:20:28,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:20:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:28,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:20:28,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-22 01:20:28,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [38235540] [2020-10-22 01:20:28,470 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:20:28,473 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:20:28,482 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-10-22 01:20:28,483 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:20:28,534 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24608#(and (<= ~i~0 29) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:20:28,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-22 01:20:28,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:20:28,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-22 01:20:28,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2020-10-22 01:20:28,535 INFO L87 Difference]: Start difference. First operand 114 states and 293 transitions. Second operand 32 states. [2020-10-22 01:20:30,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:20:30,846 INFO L93 Difference]: Finished difference Result 182 states and 433 transitions. [2020-10-22 01:20:30,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-22 01:20:30,847 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-22 01:20:30,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:20:30,848 INFO L225 Difference]: With dead ends: 182 [2020-10-22 01:20:30,849 INFO L226 Difference]: Without dead ends: 173 [2020-10-22 01:20:30,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2368, Invalid=5288, Unknown=0, NotChecked=0, Total=7656 [2020-10-22 01:20:30,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-22 01:20:30,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 85. [2020-10-22 01:20:30,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-22 01:20:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 207 transitions. [2020-10-22 01:20:30,852 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 207 transitions. Word has length 35 [2020-10-22 01:20:30,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:20:30,852 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 207 transitions. [2020-10-22 01:20:30,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-22 01:20:30,852 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 207 transitions. [2020-10-22 01:20:30,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-22 01:20:30,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:20:30,853 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:20:31,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:31,062 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:20:31,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:20:31,062 INFO L82 PathProgramCache]: Analyzing trace with hash -837249832, now seen corresponding path program 64 times [2020-10-22 01:20:31,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:20:31,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772082128] [2020-10-22 01:20:31,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:20:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:31,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772082128] [2020-10-22 01:20:31,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285219759] [2020-10-22 01:20:31,567 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:31,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:20:31,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:20:31,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-22 01:20:31,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:20:31,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:20:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:31,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:20:31,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-22 01:20:31,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [867610483] [2020-10-22 01:20:31,707 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:20:31,711 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:20:31,721 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 47 transitions. [2020-10-22 01:20:31,721 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:20:31,769 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:20:31,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-22 01:20:31,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:20:31,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-22 01:20:31,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-22 01:20:31,770 INFO L87 Difference]: Start difference. First operand 85 states and 207 transitions. Second operand 31 states. [2020-10-22 01:20:34,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:20:34,253 INFO L93 Difference]: Finished difference Result 152 states and 373 transitions. [2020-10-22 01:20:34,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-22 01:20:34,254 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-22 01:20:34,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:20:34,256 INFO L225 Difference]: With dead ends: 152 [2020-10-22 01:20:34,256 INFO L226 Difference]: Without dead ends: 147 [2020-10-22 01:20:34,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2202, Invalid=4938, Unknown=0, NotChecked=0, Total=7140 [2020-10-22 01:20:34,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-22 01:20:34,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2020-10-22 01:20:34,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-22 01:20:34,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 297 transitions. [2020-10-22 01:20:34,260 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 297 transitions. Word has length 35 [2020-10-22 01:20:34,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:20:34,260 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 297 transitions. [2020-10-22 01:20:34,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-22 01:20:34,261 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 297 transitions. [2020-10-22 01:20:34,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-22 01:20:34,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:20:34,261 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:20:34,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-22 01:20:34,473 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:20:34,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:20:34,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1122827947, now seen corresponding path program 65 times [2020-10-22 01:20:34,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:20:34,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752699700] [2020-10-22 01:20:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:20:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:35,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752699700] [2020-10-22 01:20:35,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398176936] [2020-10-22 01:20:35,179 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:35,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-22 01:20:35,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:20:35,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-22 01:20:35,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:20:35,257 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:20:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:35,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:20:35,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-10-22 01:20:35,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1726541632] [2020-10-22 01:20:35,270 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:20:35,274 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:20:35,284 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 51 transitions. [2020-10-22 01:20:35,284 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:20:35,321 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:20:35,321 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:20:35,415 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:20:35,416 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:20:35,417 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25830#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-22 01:20:35,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-22 01:20:35,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:20:35,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-22 01:20:35,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=796, Unknown=0, NotChecked=0, Total=1056 [2020-10-22 01:20:35,418 INFO L87 Difference]: Start difference. First operand 115 states and 297 transitions. Second operand 33 states. [2020-10-22 01:20:36,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:20:36,649 INFO L93 Difference]: Finished difference Result 152 states and 371 transitions. [2020-10-22 01:20:36,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-22 01:20:36,650 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-10-22 01:20:36,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:20:36,651 INFO L225 Difference]: With dead ends: 152 [2020-10-22 01:20:36,651 INFO L226 Difference]: Without dead ends: 146 [2020-10-22 01:20:36,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1210, Invalid=2696, Unknown=0, NotChecked=0, Total=3906 [2020-10-22 01:20:36,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-22 01:20:36,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 119. [2020-10-22 01:20:36,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-22 01:20:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 305 transitions. [2020-10-22 01:20:36,655 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 305 transitions. Word has length 36 [2020-10-22 01:20:36,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:20:36,656 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 305 transitions. [2020-10-22 01:20:36,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-22 01:20:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 305 transitions. [2020-10-22 01:20:36,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-22 01:20:36,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:20:36,656 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:20:36,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:36,857 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:20:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:20:36,857 INFO L82 PathProgramCache]: Analyzing trace with hash -668005337, now seen corresponding path program 66 times [2020-10-22 01:20:36,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:20:36,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414576164] [2020-10-22 01:20:36,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:20:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:37,413 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:37,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414576164] [2020-10-22 01:20:37,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585518547] [2020-10-22 01:20:37,413 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:37,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-10-22 01:20:37,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:20:37,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-22 01:20:37,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:20:37,537 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:20:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:37,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:20:37,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-10-22 01:20:37,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [875861498] [2020-10-22 01:20:37,573 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:20:37,576 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:20:37,587 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 44 transitions. [2020-10-22 01:20:37,587 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:20:37,608 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:20:37,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-22 01:20:37,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:20:37,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-22 01:20:37,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2020-10-22 01:20:37,609 INFO L87 Difference]: Start difference. First operand 119 states and 305 transitions. Second operand 32 states. [2020-10-22 01:20:40,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:20:40,073 INFO L93 Difference]: Finished difference Result 184 states and 439 transitions. [2020-10-22 01:20:40,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-22 01:20:40,074 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-10-22 01:20:40,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:20:40,075 INFO L225 Difference]: With dead ends: 184 [2020-10-22 01:20:40,076 INFO L226 Difference]: Without dead ends: 179 [2020-10-22 01:20:40,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2501, Invalid=5509, Unknown=0, NotChecked=0, Total=8010 [2020-10-22 01:20:40,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-22 01:20:40,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 90. [2020-10-22 01:20:40,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-22 01:20:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 219 transitions. [2020-10-22 01:20:40,079 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 219 transitions. Word has length 36 [2020-10-22 01:20:40,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:20:40,079 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 219 transitions. [2020-10-22 01:20:40,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-22 01:20:40,079 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 219 transitions. [2020-10-22 01:20:40,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-22 01:20:40,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:20:40,080 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:20:40,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-22 01:20:40,281 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:20:40,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:20:40,281 INFO L82 PathProgramCache]: Analyzing trace with hash -184915801, now seen corresponding path program 67 times [2020-10-22 01:20:40,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:20:40,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724982201] [2020-10-22 01:20:40,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:20:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:40,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724982201] [2020-10-22 01:20:40,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277559465] [2020-10-22 01:20:40,827 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:40,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-22 01:20:40,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:20:40,936 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:20:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:40,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:20:40,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-10-22 01:20:40,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1682036680] [2020-10-22 01:20:40,965 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:20:40,970 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:20:40,981 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-10-22 01:20:40,981 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:20:41,068 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27035#(and (<= ~i~0 33) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:20:41,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-22 01:20:41,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:20:41,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-22 01:20:41,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2020-10-22 01:20:41,069 INFO L87 Difference]: Start difference. First operand 90 states and 219 transitions. Second operand 33 states. [2020-10-22 01:20:43,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:20:43,605 INFO L93 Difference]: Finished difference Result 192 states and 457 transitions. [2020-10-22 01:20:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-22 01:20:43,606 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-10-22 01:20:43,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:20:43,608 INFO L225 Difference]: With dead ends: 192 [2020-10-22 01:20:43,608 INFO L226 Difference]: Without dead ends: 183 [2020-10-22 01:20:43,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2390, Invalid=5442, Unknown=0, NotChecked=0, Total=7832 [2020-10-22 01:20:43,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-22 01:20:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 120. [2020-10-22 01:20:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-22 01:20:43,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 309 transitions. [2020-10-22 01:20:43,613 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 309 transitions. Word has length 36 [2020-10-22 01:20:43,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:20:43,613 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 309 transitions. [2020-10-22 01:20:43,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-22 01:20:43,613 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 309 transitions. [2020-10-22 01:20:43,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-22 01:20:43,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:20:43,614 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:20:43,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-22 01:20:43,820 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:20:43,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:20:43,820 INFO L82 PathProgramCache]: Analyzing trace with hash 766696248, now seen corresponding path program 68 times [2020-10-22 01:20:43,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:20:43,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075838948] [2020-10-22 01:20:43,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:20:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:44,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075838948] [2020-10-22 01:20:44,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151343858] [2020-10-22 01:20:44,380 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:44,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:20:44,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:20:44,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-22 01:20:44,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:20:44,492 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:20:44,520 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:44,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:20:44,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-10-22 01:20:44,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [323275456] [2020-10-22 01:20:44,521 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:20:44,526 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:20:44,542 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-10-22 01:20:44,542 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:20:44,597 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27720#(and (<= ~i~0 31) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:20:44,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-22 01:20:44,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:20:44,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-22 01:20:44,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2020-10-22 01:20:44,598 INFO L87 Difference]: Start difference. First operand 120 states and 309 transitions. Second operand 34 states. [2020-10-22 01:20:47,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:20:47,183 INFO L93 Difference]: Finished difference Result 192 states and 457 transitions. [2020-10-22 01:20:47,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-22 01:20:47,184 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-10-22 01:20:47,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:20:47,186 INFO L225 Difference]: With dead ends: 192 [2020-10-22 01:20:47,186 INFO L226 Difference]: Without dead ends: 183 [2020-10-22 01:20:47,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2539 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2702, Invalid=6040, Unknown=0, NotChecked=0, Total=8742 [2020-10-22 01:20:47,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-22 01:20:47,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 89. [2020-10-22 01:20:47,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-22 01:20:47,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 217 transitions. [2020-10-22 01:20:47,190 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 217 transitions. Word has length 37 [2020-10-22 01:20:47,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:20:47,190 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 217 transitions. [2020-10-22 01:20:47,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-22 01:20:47,190 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 217 transitions. [2020-10-22 01:20:47,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-22 01:20:47,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:20:47,191 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:20:47,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-22 01:20:47,392 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:20:47,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:20:47,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1437394437, now seen corresponding path program 69 times [2020-10-22 01:20:47,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:20:47,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415108504] [2020-10-22 01:20:47,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:20:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:47,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415108504] [2020-10-22 01:20:47,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249287921] [2020-10-22 01:20:47,984 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:48,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-10-22 01:20:48,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:20:48,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-22 01:20:48,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:20:48,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:20:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:48,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:20:48,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-10-22 01:20:48,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [40476415] [2020-10-22 01:20:48,146 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:20:48,150 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:20:48,162 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 49 transitions. [2020-10-22 01:20:48,162 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:20:48,212 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:20:48,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-22 01:20:48,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:20:48,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-22 01:20:48,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2020-10-22 01:20:48,214 INFO L87 Difference]: Start difference. First operand 89 states and 217 transitions. Second operand 33 states. [2020-10-22 01:20:50,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:20:50,860 INFO L93 Difference]: Finished difference Result 160 states and 393 transitions. [2020-10-22 01:20:50,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-22 01:20:50,861 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2020-10-22 01:20:50,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:20:50,863 INFO L225 Difference]: With dead ends: 160 [2020-10-22 01:20:50,863 INFO L226 Difference]: Without dead ends: 155 [2020-10-22 01:20:50,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2524, Invalid=5666, Unknown=0, NotChecked=0, Total=8190 [2020-10-22 01:20:50,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-22 01:20:50,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-22 01:20:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-22 01:20:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 313 transitions. [2020-10-22 01:20:50,866 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 313 transitions. Word has length 37 [2020-10-22 01:20:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:20:50,867 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 313 transitions. [2020-10-22 01:20:50,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-22 01:20:50,867 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 313 transitions. [2020-10-22 01:20:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-22 01:20:50,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:20:50,868 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:20:51,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:51,078 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:20:51,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:20:51,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1000859528, now seen corresponding path program 70 times [2020-10-22 01:20:51,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:20:51,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149026419] [2020-10-22 01:20:51,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:20:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:51,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149026419] [2020-10-22 01:20:51,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778959921] [2020-10-22 01:20:51,907 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:51,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:20:51,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:20:51,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-22 01:20:51,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:20:51,981 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:20:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:51,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:20:51,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-10-22 01:20:51,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [55397813] [2020-10-22 01:20:51,993 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:20:51,997 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:20:52,016 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 53 transitions. [2020-10-22 01:20:52,016 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:20:52,020 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:20:52,021 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:20:52,074 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:20:52,074 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:20:52,119 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:20:52,119 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:20:52,140 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29012#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-22 01:20:52,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-22 01:20:52,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:20:52,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-22 01:20:52,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=897, Unknown=0, NotChecked=0, Total=1190 [2020-10-22 01:20:52,141 INFO L87 Difference]: Start difference. First operand 121 states and 313 transitions. Second operand 35 states. [2020-10-22 01:20:53,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:20:53,788 INFO L93 Difference]: Finished difference Result 160 states and 391 transitions. [2020-10-22 01:20:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-22 01:20:53,788 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-10-22 01:20:53,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:20:53,789 INFO L225 Difference]: With dead ends: 160 [2020-10-22 01:20:53,789 INFO L226 Difference]: Without dead ends: 154 [2020-10-22 01:20:53,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1370, Invalid=3052, Unknown=0, NotChecked=0, Total=4422 [2020-10-22 01:20:53,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-22 01:20:53,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 125. [2020-10-22 01:20:53,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-22 01:20:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 321 transitions. [2020-10-22 01:20:53,793 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 321 transitions. Word has length 38 [2020-10-22 01:20:53,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:20:53,794 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 321 transitions. [2020-10-22 01:20:53,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-22 01:20:53,794 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 321 transitions. [2020-10-22 01:20:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-22 01:20:53,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:20:53,794 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:20:54,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:54,005 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:20:54,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:20:54,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2002191990, now seen corresponding path program 71 times [2020-10-22 01:20:54,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:20:54,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96701071] [2020-10-22 01:20:54,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:20:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:54,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96701071] [2020-10-22 01:20:54,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393358595] [2020-10-22 01:20:54,632 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:54,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-10-22 01:20:54,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:20:54,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-22 01:20:54,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:20:54,770 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:20:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:54,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:20:54,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-10-22 01:20:54,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2108461685] [2020-10-22 01:20:54,803 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:20:54,807 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:20:54,822 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 46 transitions. [2020-10-22 01:20:54,822 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:20:54,844 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:20:54,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-22 01:20:54,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:20:54,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-22 01:20:54,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2020-10-22 01:20:54,845 INFO L87 Difference]: Start difference. First operand 125 states and 321 transitions. Second operand 34 states. [2020-10-22 01:20:57,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:20:57,619 INFO L93 Difference]: Finished difference Result 194 states and 463 transitions. [2020-10-22 01:20:57,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-22 01:20:57,619 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2020-10-22 01:20:57,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:20:57,621 INFO L225 Difference]: With dead ends: 194 [2020-10-22 01:20:57,621 INFO L226 Difference]: Without dead ends: 189 [2020-10-22 01:20:57,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2680 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2844, Invalid=6276, Unknown=0, NotChecked=0, Total=9120 [2020-10-22 01:20:57,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-22 01:20:57,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 94. [2020-10-22 01:20:57,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-22 01:20:57,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 229 transitions. [2020-10-22 01:20:57,624 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 229 transitions. Word has length 38 [2020-10-22 01:20:57,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:20:57,625 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 229 transitions. [2020-10-22 01:20:57,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-22 01:20:57,625 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 229 transitions. [2020-10-22 01:20:57,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-22 01:20:57,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:20:57,626 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:20:57,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:57,836 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:20:57,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:20:57,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1609529372, now seen corresponding path program 72 times [2020-10-22 01:20:57,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:20:57,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584105179] [2020-10-22 01:20:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:20:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:20:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:58,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584105179] [2020-10-22 01:20:58,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669090022] [2020-10-22 01:20:58,458 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:20:58,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-10-22 01:20:58,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:20:58,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-22 01:20:58,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:20:58,582 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:20:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:20:58,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:20:58,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-10-22 01:20:58,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2086179688] [2020-10-22 01:20:58,614 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:20:58,617 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:20:58,631 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-10-22 01:20:58,632 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:20:58,736 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30283#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 35))] [2020-10-22 01:20:58,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-22 01:20:58,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:20:58,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-22 01:20:58,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=977, Unknown=0, NotChecked=0, Total=1260 [2020-10-22 01:20:58,737 INFO L87 Difference]: Start difference. First operand 94 states and 229 transitions. Second operand 35 states. [2020-10-22 01:21:01,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:21:01,586 INFO L93 Difference]: Finished difference Result 202 states and 481 transitions. [2020-10-22 01:21:01,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-22 01:21:01,587 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-10-22 01:21:01,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:21:01,588 INFO L225 Difference]: With dead ends: 202 [2020-10-22 01:21:01,588 INFO L226 Difference]: Without dead ends: 193 [2020-10-22 01:21:01,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2428 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2725, Invalid=6205, Unknown=0, NotChecked=0, Total=8930 [2020-10-22 01:21:01,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-22 01:21:01,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 126. [2020-10-22 01:21:01,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-22 01:21:01,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 325 transitions. [2020-10-22 01:21:01,592 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 325 transitions. Word has length 38 [2020-10-22 01:21:01,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:21:01,592 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 325 transitions. [2020-10-22 01:21:01,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-22 01:21:01,593 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 325 transitions. [2020-10-22 01:21:01,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-22 01:21:01,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:21:01,593 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:21:01,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2020-10-22 01:21:01,803 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:21:01,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:21:01,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1938384331, now seen corresponding path program 73 times [2020-10-22 01:21:01,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:21:01,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989717344] [2020-10-22 01:21:01,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:21:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:21:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:02,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989717344] [2020-10-22 01:21:02,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498911045] [2020-10-22 01:21:02,470 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:21:02,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-22 01:21:02,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:21:02,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:21:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:02,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:21:02,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-10-22 01:21:02,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [372043493] [2020-10-22 01:21:02,625 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:21:02,628 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:21:02,642 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-10-22 01:21:02,642 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:21:02,699 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31006#(and (<= ~i~0 33) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:21:02,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-22 01:21:02,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:21:02,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-22 01:21:02,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1032, Unknown=0, NotChecked=0, Total=1332 [2020-10-22 01:21:02,700 INFO L87 Difference]: Start difference. First operand 126 states and 325 transitions. Second operand 36 states. [2020-10-22 01:21:05,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:21:05,697 INFO L93 Difference]: Finished difference Result 202 states and 481 transitions. [2020-10-22 01:21:05,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-22 01:21:05,699 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-10-22 01:21:05,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:21:05,700 INFO L225 Difference]: With dead ends: 202 [2020-10-22 01:21:05,700 INFO L226 Difference]: Without dead ends: 193 [2020-10-22 01:21:05,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2888 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3058, Invalid=6842, Unknown=0, NotChecked=0, Total=9900 [2020-10-22 01:21:05,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-22 01:21:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 93. [2020-10-22 01:21:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-22 01:21:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 227 transitions. [2020-10-22 01:21:05,704 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 227 transitions. Word has length 39 [2020-10-22 01:21:05,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:21:05,704 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 227 transitions. [2020-10-22 01:21:05,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-22 01:21:05,704 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 227 transitions. [2020-10-22 01:21:05,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-22 01:21:05,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:21:05,705 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:21:05,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:05,911 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:21:05,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:21:05,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1644225118, now seen corresponding path program 74 times [2020-10-22 01:21:05,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:21:05,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625629060] [2020-10-22 01:21:05,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:21:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:21:06,568 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:06,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625629060] [2020-10-22 01:21:06,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404685769] [2020-10-22 01:21:06,569 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:06,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:21:06,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:21:06,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-22 01:21:06,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:21:06,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:21:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:06,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:21:06,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-10-22 01:21:06,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [911739005] [2020-10-22 01:21:06,726 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:21:06,729 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:21:06,742 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 51 transitions. [2020-10-22 01:21:06,742 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:21:06,789 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:21:06,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-22 01:21:06,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:21:06,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-22 01:21:06,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2020-10-22 01:21:06,791 INFO L87 Difference]: Start difference. First operand 93 states and 227 transitions. Second operand 35 states. [2020-10-22 01:21:09,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:21:09,790 INFO L93 Difference]: Finished difference Result 168 states and 413 transitions. [2020-10-22 01:21:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-22 01:21:09,791 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 39 [2020-10-22 01:21:09,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:21:09,792 INFO L225 Difference]: With dead ends: 168 [2020-10-22 01:21:09,793 INFO L226 Difference]: Without dead ends: 163 [2020-10-22 01:21:09,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2868, Invalid=6444, Unknown=0, NotChecked=0, Total=9312 [2020-10-22 01:21:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-22 01:21:09,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 127. [2020-10-22 01:21:09,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-22 01:21:09,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 329 transitions. [2020-10-22 01:21:09,796 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 329 transitions. Word has length 39 [2020-10-22 01:21:09,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:21:09,796 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 329 transitions. [2020-10-22 01:21:09,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-22 01:21:09,796 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 329 transitions. [2020-10-22 01:21:09,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-22 01:21:09,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:21:09,797 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:21:09,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:09,999 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:21:09,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:21:09,999 INFO L82 PathProgramCache]: Analyzing trace with hash 246674139, now seen corresponding path program 75 times [2020-10-22 01:21:10,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:21:10,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679907105] [2020-10-22 01:21:10,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:21:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:21:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:10,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679907105] [2020-10-22 01:21:10,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737133012] [2020-10-22 01:21:10,928 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:11,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-22 01:21:11,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:21:11,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-22 01:21:11,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:21:11,016 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:21:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:11,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:21:11,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-10-22 01:21:11,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [784503552] [2020-10-22 01:21:11,030 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:21:11,034 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:21:11,048 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 55 transitions. [2020-10-22 01:21:11,048 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:21:11,052 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:21:11,052 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:21:11,146 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:21:11,146 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:21:11,186 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32368#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-22 01:21:11,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-22 01:21:11,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:21:11,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-22 01:21:11,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1004, Unknown=0, NotChecked=0, Total=1332 [2020-10-22 01:21:11,188 INFO L87 Difference]: Start difference. First operand 127 states and 329 transitions. Second operand 37 states. [2020-10-22 01:21:12,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:21:12,768 INFO L93 Difference]: Finished difference Result 168 states and 411 transitions. [2020-10-22 01:21:12,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-22 01:21:12,769 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-10-22 01:21:12,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:21:12,771 INFO L225 Difference]: With dead ends: 168 [2020-10-22 01:21:12,771 INFO L226 Difference]: Without dead ends: 162 [2020-10-22 01:21:12,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1540, Invalid=3430, Unknown=0, NotChecked=0, Total=4970 [2020-10-22 01:21:12,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-22 01:21:12,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 131. [2020-10-22 01:21:12,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-22 01:21:12,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 337 transitions. [2020-10-22 01:21:12,775 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 337 transitions. Word has length 40 [2020-10-22 01:21:12,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:21:12,775 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 337 transitions. [2020-10-22 01:21:12,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-22 01:21:12,775 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 337 transitions. [2020-10-22 01:21:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-22 01:21:12,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:21:12,776 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:21:12,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:12,980 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:21:12,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:21:12,980 INFO L82 PathProgramCache]: Analyzing trace with hash 39655981, now seen corresponding path program 76 times [2020-10-22 01:21:12,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:21:12,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591018598] [2020-10-22 01:21:12,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:21:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:21:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:13,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591018598] [2020-10-22 01:21:13,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125986174] [2020-10-22 01:21:13,693 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:13,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:21:13,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:21:13,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-22 01:21:13,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:21:13,812 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:21:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:13,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:21:13,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-10-22 01:21:13,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [618237004] [2020-10-22 01:21:13,849 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:21:13,852 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:21:13,869 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 48 transitions. [2020-10-22 01:21:13,870 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:21:13,897 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:21:13,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-22 01:21:13,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:21:13,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-22 01:21:13,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2020-10-22 01:21:13,898 INFO L87 Difference]: Start difference. First operand 131 states and 337 transitions. Second operand 36 states. [2020-10-22 01:21:17,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:21:17,036 INFO L93 Difference]: Finished difference Result 204 states and 487 transitions. [2020-10-22 01:21:17,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-22 01:21:17,037 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2020-10-22 01:21:17,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:21:17,038 INFO L225 Difference]: With dead ends: 204 [2020-10-22 01:21:17,038 INFO L226 Difference]: Without dead ends: 199 [2020-10-22 01:21:17,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3209, Invalid=7093, Unknown=0, NotChecked=0, Total=10302 [2020-10-22 01:21:17,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-22 01:21:17,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 98. [2020-10-22 01:21:17,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-22 01:21:17,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 239 transitions. [2020-10-22 01:21:17,042 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 239 transitions. Word has length 40 [2020-10-22 01:21:17,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:21:17,042 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 239 transitions. [2020-10-22 01:21:17,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-22 01:21:17,042 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 239 transitions. [2020-10-22 01:21:17,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-22 01:21:17,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:21:17,042 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:21:17,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-22 01:21:17,243 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:21:17,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:21:17,244 INFO L82 PathProgramCache]: Analyzing trace with hash -568603679, now seen corresponding path program 77 times [2020-10-22 01:21:17,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:21:17,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870033130] [2020-10-22 01:21:17,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:21:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:21:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:17,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870033130] [2020-10-22 01:21:17,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65349067] [2020-10-22 01:21:17,960 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:18,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-10-22 01:21:18,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:21:18,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-22 01:21:18,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:21:18,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:21:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:18,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:21:18,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-10-22 01:21:18,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1383044989] [2020-10-22 01:21:18,136 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:21:18,139 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:21:18,152 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-10-22 01:21:18,152 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:21:18,242 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33705#(and (<= ~i~0 37) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:21:18,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-22 01:21:18,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:21:18,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-22 01:21:18,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1089, Unknown=0, NotChecked=0, Total=1406 [2020-10-22 01:21:18,243 INFO L87 Difference]: Start difference. First operand 98 states and 239 transitions. Second operand 37 states. [2020-10-22 01:21:21,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:21:21,436 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-10-22 01:21:21,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-22 01:21:21,436 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-10-22 01:21:21,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:21:21,438 INFO L225 Difference]: With dead ends: 212 [2020-10-22 01:21:21,438 INFO L226 Difference]: Without dead ends: 203 [2020-10-22 01:21:21,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2766 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3082, Invalid=7018, Unknown=0, NotChecked=0, Total=10100 [2020-10-22 01:21:21,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-22 01:21:21,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 132. [2020-10-22 01:21:21,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-22 01:21:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 341 transitions. [2020-10-22 01:21:21,442 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 341 transitions. Word has length 40 [2020-10-22 01:21:21,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:21:21,442 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 341 transitions. [2020-10-22 01:21:21,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-22 01:21:21,442 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 341 transitions. [2020-10-22 01:21:21,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-22 01:21:21,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:21:21,443 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:21:21,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:21,645 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:21:21,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:21:21,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1229360626, now seen corresponding path program 78 times [2020-10-22 01:21:21,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:21:21,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778565873] [2020-10-22 01:21:21,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:21:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:21:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:22,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778565873] [2020-10-22 01:21:22,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908716176] [2020-10-22 01:21:22,416 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:22,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-10-22 01:21:22,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:21:22,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-22 01:21:22,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:21:22,549 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:21:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:22,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:21:22,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-10-22 01:21:22,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1646110579] [2020-10-22 01:21:22,581 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:21:22,584 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:21:22,598 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 51 transitions. [2020-10-22 01:21:22,599 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:21:22,667 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34466#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 35))] [2020-10-22 01:21:22,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-22 01:21:22,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:21:22,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-22 01:21:22,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1147, Unknown=0, NotChecked=0, Total=1482 [2020-10-22 01:21:22,669 INFO L87 Difference]: Start difference. First operand 132 states and 341 transitions. Second operand 38 states. [2020-10-22 01:21:26,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:21:26,061 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-10-22 01:21:26,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-22 01:21:26,061 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-10-22 01:21:26,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:21:26,063 INFO L225 Difference]: With dead ends: 212 [2020-10-22 01:21:26,063 INFO L226 Difference]: Without dead ends: 203 [2020-10-22 01:21:26,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3259 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3436, Invalid=7694, Unknown=0, NotChecked=0, Total=11130 [2020-10-22 01:21:26,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-22 01:21:26,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 97. [2020-10-22 01:21:26,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-22 01:21:26,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 237 transitions. [2020-10-22 01:21:26,066 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 237 transitions. Word has length 41 [2020-10-22 01:21:26,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:21:26,067 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 237 transitions. [2020-10-22 01:21:26,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-22 01:21:26,067 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 237 transitions. [2020-10-22 01:21:26,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-22 01:21:26,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:21:26,067 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:21:26,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-22 01:21:26,268 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:21:26,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:21:26,269 INFO L82 PathProgramCache]: Analyzing trace with hash -446816767, now seen corresponding path program 79 times [2020-10-22 01:21:26,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:21:26,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287446617] [2020-10-22 01:21:26,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:21:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:21:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:27,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287446617] [2020-10-22 01:21:27,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892759598] [2020-10-22 01:21:27,047 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:21:27,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-22 01:21:27,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:21:27,167 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:21:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:27,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:21:27,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-10-22 01:21:27,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1111263166] [2020-10-22 01:21:27,214 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:21:27,218 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:21:27,234 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 53 transitions. [2020-10-22 01:21:27,234 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:21:27,289 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:21:27,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-22 01:21:27,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:21:27,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-22 01:21:27,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2020-10-22 01:21:27,291 INFO L87 Difference]: Start difference. First operand 97 states and 237 transitions. Second operand 37 states. [2020-10-22 01:21:30,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:21:30,666 INFO L93 Difference]: Finished difference Result 176 states and 433 transitions. [2020-10-22 01:21:30,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-22 01:21:30,667 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 41 [2020-10-22 01:21:30,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:21:30,668 INFO L225 Difference]: With dead ends: 176 [2020-10-22 01:21:30,669 INFO L226 Difference]: Without dead ends: 171 [2020-10-22 01:21:30,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2909 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3234, Invalid=7272, Unknown=0, NotChecked=0, Total=10506 [2020-10-22 01:21:30,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-22 01:21:30,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2020-10-22 01:21:30,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-22 01:21:30,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 345 transitions. [2020-10-22 01:21:30,672 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 345 transitions. Word has length 41 [2020-10-22 01:21:30,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:21:30,673 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 345 transitions. [2020-10-22 01:21:30,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-22 01:21:30,673 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 345 transitions. [2020-10-22 01:21:30,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-22 01:21:30,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:21:30,674 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:21:30,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:30,878 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:21:30,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:21:30,878 INFO L82 PathProgramCache]: Analyzing trace with hash 830652542, now seen corresponding path program 80 times [2020-10-22 01:21:30,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:21:30,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099228659] [2020-10-22 01:21:30,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:21:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:21:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:31,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099228659] [2020-10-22 01:21:31,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092725477] [2020-10-22 01:21:31,959 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:32,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:21:32,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:21:32,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-22 01:21:32,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:21:32,039 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:21:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:32,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:21:32,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2020-10-22 01:21:32,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1031678173] [2020-10-22 01:21:32,056 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:21:32,060 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:21:32,084 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 57 transitions. [2020-10-22 01:21:32,084 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:21:32,089 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:21:32,090 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:21:32,188 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:21:32,188 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:21:32,221 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:21:32,221 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:21:32,222 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35898#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-22 01:21:32,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-22 01:21:32,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:21:32,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-22 01:21:32,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2020-10-22 01:21:32,224 INFO L87 Difference]: Start difference. First operand 133 states and 345 transitions. Second operand 39 states. [2020-10-22 01:21:33,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:21:33,999 INFO L93 Difference]: Finished difference Result 176 states and 431 transitions. [2020-10-22 01:21:34,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-22 01:21:34,000 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-10-22 01:21:34,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:21:34,002 INFO L225 Difference]: With dead ends: 176 [2020-10-22 01:21:34,002 INFO L226 Difference]: Without dead ends: 170 [2020-10-22 01:21:34,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1720, Invalid=3830, Unknown=0, NotChecked=0, Total=5550 [2020-10-22 01:21:34,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-22 01:21:34,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 137. [2020-10-22 01:21:34,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-22 01:21:34,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 353 transitions. [2020-10-22 01:21:34,007 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 353 transitions. Word has length 42 [2020-10-22 01:21:34,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:21:34,007 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 353 transitions. [2020-10-22 01:21:34,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-22 01:21:34,007 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 353 transitions. [2020-10-22 01:21:34,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-22 01:21:34,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:21:34,008 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:21:34,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:34,218 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:21:34,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:21:34,218 INFO L82 PathProgramCache]: Analyzing trace with hash -544498160, now seen corresponding path program 81 times [2020-10-22 01:21:34,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:21:34,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17928494] [2020-10-22 01:21:34,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:21:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:21:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:35,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17928494] [2020-10-22 01:21:35,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021749419] [2020-10-22 01:21:35,031 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:35,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-10-22 01:21:35,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:21:35,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-22 01:21:35,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:21:35,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:21:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:35,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:21:35,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-10-22 01:21:35,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [659104756] [2020-10-22 01:21:35,204 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:21:35,207 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:21:35,238 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 50 transitions. [2020-10-22 01:21:35,238 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:21:35,260 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:21:35,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-22 01:21:35,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:21:35,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-22 01:21:35,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2020-10-22 01:21:35,261 INFO L87 Difference]: Start difference. First operand 137 states and 353 transitions. Second operand 38 states. [2020-10-22 01:21:38,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:21:38,775 INFO L93 Difference]: Finished difference Result 214 states and 511 transitions. [2020-10-22 01:21:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-22 01:21:38,776 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2020-10-22 01:21:38,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:21:38,778 INFO L225 Difference]: With dead ends: 214 [2020-10-22 01:21:38,778 INFO L226 Difference]: Without dead ends: 209 [2020-10-22 01:21:38,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3418 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3596, Invalid=7960, Unknown=0, NotChecked=0, Total=11556 [2020-10-22 01:21:38,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-22 01:21:38,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 102. [2020-10-22 01:21:38,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-22 01:21:38,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 249 transitions. [2020-10-22 01:21:38,783 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 249 transitions. Word has length 42 [2020-10-22 01:21:38,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:21:38,783 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 249 transitions. [2020-10-22 01:21:38,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-22 01:21:38,784 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 249 transitions. [2020-10-22 01:21:38,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-22 01:21:38,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:21:38,784 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:21:38,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:38,994 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:21:38,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:21:38,994 INFO L82 PathProgramCache]: Analyzing trace with hash -966392674, now seen corresponding path program 82 times [2020-10-22 01:21:38,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:21:38,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717609464] [2020-10-22 01:21:38,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:21:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:21:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:39,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717609464] [2020-10-22 01:21:39,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185031736] [2020-10-22 01:21:39,819 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:39,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:21:39,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:21:39,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-22 01:21:39,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:21:39,937 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:21:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:39,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:21:39,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-10-22 01:21:39,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [793335991] [2020-10-22 01:21:39,970 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:21:39,974 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:21:39,988 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 56 transitions. [2020-10-22 01:21:39,989 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:21:40,080 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37301#(and (<= ~i~0 39) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:21:40,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-22 01:21:40,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:21:40,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-22 01:21:40,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2020-10-22 01:21:40,081 INFO L87 Difference]: Start difference. First operand 102 states and 249 transitions. Second operand 39 states. [2020-10-22 01:21:43,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:21:43,697 INFO L93 Difference]: Finished difference Result 222 states and 529 transitions. [2020-10-22 01:21:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-22 01:21:43,698 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-10-22 01:21:43,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:21:43,699 INFO L225 Difference]: With dead ends: 222 [2020-10-22 01:21:43,699 INFO L226 Difference]: Without dead ends: 213 [2020-10-22 01:21:43,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3126 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3461, Invalid=7881, Unknown=0, NotChecked=0, Total=11342 [2020-10-22 01:21:43,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-22 01:21:43,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 138. [2020-10-22 01:21:43,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-22 01:21:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 357 transitions. [2020-10-22 01:21:43,703 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 357 transitions. Word has length 42 [2020-10-22 01:21:43,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:21:43,703 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 357 transitions. [2020-10-22 01:21:43,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-22 01:21:43,703 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 357 transitions. [2020-10-22 01:21:43,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-22 01:21:43,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:21:43,704 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:21:43,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:43,905 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:21:43,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:21:43,905 INFO L82 PathProgramCache]: Analyzing trace with hash 300451439, now seen corresponding path program 83 times [2020-10-22 01:21:43,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:21:43,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099446346] [2020-10-22 01:21:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:21:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:21:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:44,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099446346] [2020-10-22 01:21:44,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550929187] [2020-10-22 01:21:44,774 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:44,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-10-22 01:21:44,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:21:44,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-22 01:21:44,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:21:44,919 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:21:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:44,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:21:44,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-10-22 01:21:44,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1954115449] [2020-10-22 01:21:44,956 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:21:44,961 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:21:45,027 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 53 transitions. [2020-10-22 01:21:45,027 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:21:45,106 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38100#(and (<= ~i~0 37) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:21:45,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-22 01:21:45,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:21:45,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-22 01:21:45,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1268, Unknown=0, NotChecked=0, Total=1640 [2020-10-22 01:21:45,107 INFO L87 Difference]: Start difference. First operand 138 states and 357 transitions. Second operand 40 states. [2020-10-22 01:21:48,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:21:48,915 INFO L93 Difference]: Finished difference Result 222 states and 529 transitions. [2020-10-22 01:21:48,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-22 01:21:48,916 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-10-22 01:21:48,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:21:48,918 INFO L225 Difference]: With dead ends: 222 [2020-10-22 01:21:48,918 INFO L226 Difference]: Without dead ends: 213 [2020-10-22 01:21:48,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3652 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3836, Invalid=8596, Unknown=0, NotChecked=0, Total=12432 [2020-10-22 01:21:48,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-22 01:21:48,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 101. [2020-10-22 01:21:48,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-22 01:21:48,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-22 01:21:48,921 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 43 [2020-10-22 01:21:48,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:21:48,922 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-22 01:21:48,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-22 01:21:48,922 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-22 01:21:48,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-22 01:21:48,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:21:48,923 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:21:49,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:49,124 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:21:49,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:21:49,124 INFO L82 PathProgramCache]: Analyzing trace with hash 106626276, now seen corresponding path program 84 times [2020-10-22 01:21:49,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:21:49,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190858626] [2020-10-22 01:21:49,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:21:49,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:21:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:50,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190858626] [2020-10-22 01:21:50,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592353869] [2020-10-22 01:21:50,010 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:50,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-10-22 01:21:50,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:21:50,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-22 01:21:50,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:21:50,158 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:21:50,202 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:50,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:21:50,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-10-22 01:21:50,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1885251685] [2020-10-22 01:21:50,203 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:21:50,208 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:21:50,232 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 55 transitions. [2020-10-22 01:21:50,232 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:21:50,311 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:21:50,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-22 01:21:50,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:21:50,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-22 01:21:50,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2020-10-22 01:21:50,312 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 39 states. [2020-10-22 01:21:54,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:21:54,095 INFO L93 Difference]: Finished difference Result 184 states and 453 transitions. [2020-10-22 01:21:54,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-22 01:21:54,096 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 43 [2020-10-22 01:21:54,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:21:54,097 INFO L225 Difference]: With dead ends: 184 [2020-10-22 01:21:54,097 INFO L226 Difference]: Without dead ends: 179 [2020-10-22 01:21:54,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3278 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3622, Invalid=8150, Unknown=0, NotChecked=0, Total=11772 [2020-10-22 01:21:54,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-22 01:21:54,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 139. [2020-10-22 01:21:54,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-22 01:21:54,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 361 transitions. [2020-10-22 01:21:54,102 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 361 transitions. Word has length 43 [2020-10-22 01:21:54,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:21:54,102 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 361 transitions. [2020-10-22 01:21:54,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-22 01:21:54,102 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 361 transitions. [2020-10-22 01:21:54,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-22 01:21:54,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:21:54,103 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:21:54,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:54,303 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:21:54,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:21:54,304 INFO L82 PathProgramCache]: Analyzing trace with hash -606817951, now seen corresponding path program 85 times [2020-10-22 01:21:54,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:21:54,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109970888] [2020-10-22 01:21:54,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:21:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:21:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:55,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109970888] [2020-10-22 01:21:55,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350098501] [2020-10-22 01:21:55,473 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:21:55,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-22 01:21:55,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:21:55,553 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:21:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:55,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:21:55,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2020-10-22 01:21:55,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [117619327] [2020-10-22 01:21:55,567 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:21:55,570 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:21:55,587 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 59 transitions. [2020-10-22 01:21:55,587 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:21:55,590 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:21:55,591 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:21:55,710 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:21:55,710 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:21:55,730 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39602#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-22 01:21:55,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-22 01:21:55,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:21:55,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-22 01:21:55,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2020-10-22 01:21:55,732 INFO L87 Difference]: Start difference. First operand 139 states and 361 transitions. Second operand 41 states. [2020-10-22 01:21:57,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:21:57,734 INFO L93 Difference]: Finished difference Result 184 states and 451 transitions. [2020-10-22 01:21:57,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-22 01:21:57,736 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-10-22 01:21:57,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:21:57,737 INFO L225 Difference]: With dead ends: 184 [2020-10-22 01:21:57,737 INFO L226 Difference]: Without dead ends: 178 [2020-10-22 01:21:57,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1910, Invalid=4252, Unknown=0, NotChecked=0, Total=6162 [2020-10-22 01:21:57,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-22 01:21:57,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 143. [2020-10-22 01:21:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-22 01:21:57,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 369 transitions. [2020-10-22 01:21:57,741 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 369 transitions. Word has length 44 [2020-10-22 01:21:57,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:21:57,741 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 369 transitions. [2020-10-22 01:21:57,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-22 01:21:57,741 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 369 transitions. [2020-10-22 01:21:57,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-22 01:21:57,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:21:57,742 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:21:57,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:57,942 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:21:57,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:21:57,943 INFO L82 PathProgramCache]: Analyzing trace with hash 724088115, now seen corresponding path program 86 times [2020-10-22 01:21:57,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:21:57,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299951230] [2020-10-22 01:21:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:21:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:21:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:58,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299951230] [2020-10-22 01:21:58,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342818520] [2020-10-22 01:21:58,863 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:21:58,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:21:58,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:21:58,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-22 01:21:58,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:21:59,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:21:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:21:59,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:21:59,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-10-22 01:21:59,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [766559457] [2020-10-22 01:21:59,058 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:21:59,061 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:21:59,078 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 52 transitions. [2020-10-22 01:21:59,078 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:21:59,099 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:21:59,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-22 01:21:59,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:21:59,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-22 01:21:59,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1251, Unknown=0, NotChecked=0, Total=1640 [2020-10-22 01:21:59,100 INFO L87 Difference]: Start difference. First operand 143 states and 369 transitions. Second operand 40 states. [2020-10-22 01:22:03,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:22:03,040 INFO L93 Difference]: Finished difference Result 224 states and 535 transitions. [2020-10-22 01:22:03,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-22 01:22:03,041 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2020-10-22 01:22:03,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:22:03,042 INFO L225 Difference]: With dead ends: 224 [2020-10-22 01:22:03,042 INFO L226 Difference]: Without dead ends: 219 [2020-10-22 01:22:03,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3820 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4005, Invalid=8877, Unknown=0, NotChecked=0, Total=12882 [2020-10-22 01:22:03,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-22 01:22:03,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 106. [2020-10-22 01:22:03,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-22 01:22:03,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 259 transitions. [2020-10-22 01:22:03,045 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 259 transitions. Word has length 44 [2020-10-22 01:22:03,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:22:03,046 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 259 transitions. [2020-10-22 01:22:03,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-22 01:22:03,046 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 259 transitions. [2020-10-22 01:22:03,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-22 01:22:03,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:22:03,046 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:22:03,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-22 01:22:03,250 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:22:03,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:22:03,251 INFO L82 PathProgramCache]: Analyzing trace with hash -989527525, now seen corresponding path program 87 times [2020-10-22 01:22:03,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:22:03,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483735150] [2020-10-22 01:22:03,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:22:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:22:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:22:04,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483735150] [2020-10-22 01:22:04,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544626246] [2020-10-22 01:22:04,208 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:22:04,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-10-22 01:22:04,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:22:04,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-22 01:22:04,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:22:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:22:04,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:22:04,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-10-22 01:22:04,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [461461622] [2020-10-22 01:22:04,404 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:22:04,407 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:22:04,425 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 58 transitions. [2020-10-22 01:22:04,426 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:22:04,527 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41071#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 41))] [2020-10-22 01:22:04,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-22 01:22:04,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:22:04,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-22 01:22:04,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1331, Unknown=0, NotChecked=0, Total=1722 [2020-10-22 01:22:04,529 INFO L87 Difference]: Start difference. First operand 106 states and 259 transitions. Second operand 41 states. [2020-10-22 01:22:08,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:22:08,679 INFO L93 Difference]: Finished difference Result 232 states and 553 transitions. [2020-10-22 01:22:08,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-22 01:22:08,681 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-10-22 01:22:08,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:22:08,682 INFO L225 Difference]: With dead ends: 232 [2020-10-22 01:22:08,683 INFO L226 Difference]: Without dead ends: 223 [2020-10-22 01:22:08,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3508 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3862, Invalid=8794, Unknown=0, NotChecked=0, Total=12656 [2020-10-22 01:22:08,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-22 01:22:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 144. [2020-10-22 01:22:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-22 01:22:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 373 transitions. [2020-10-22 01:22:08,686 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 373 transitions. Word has length 44 [2020-10-22 01:22:08,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:22:08,687 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 373 transitions. [2020-10-22 01:22:08,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-22 01:22:08,687 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 373 transitions. [2020-10-22 01:22:08,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-22 01:22:08,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:22:08,688 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:22:08,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:22:08,898 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:22:08,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:22:08,898 INFO L82 PathProgramCache]: Analyzing trace with hash 971920300, now seen corresponding path program 88 times [2020-10-22 01:22:08,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:22:08,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827820036] [2020-10-22 01:22:08,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:22:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:22:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:22:09,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827820036] [2020-10-22 01:22:09,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299360857] [2020-10-22 01:22:09,865 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:22:09,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:22:09,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:22:09,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-22 01:22:09,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:22:10,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:22:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:22:10,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:22:10,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-10-22 01:22:10,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1544450023] [2020-10-22 01:22:10,039 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:22:10,043 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:22:10,067 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 55 transitions. [2020-10-22 01:22:10,067 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:22:10,133 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41908#(and (<= ~i~0 39) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-22 01:22:10,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-22 01:22:10,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:22:10,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-22 01:22:10,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806 [2020-10-22 01:22:10,134 INFO L87 Difference]: Start difference. First operand 144 states and 373 transitions. Second operand 42 states. [2020-10-22 01:22:14,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:22:14,409 INFO L93 Difference]: Finished difference Result 232 states and 553 transitions. [2020-10-22 01:22:14,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-22 01:22:14,410 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-10-22 01:22:14,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:22:14,411 INFO L225 Difference]: With dead ends: 232 [2020-10-22 01:22:14,411 INFO L226 Difference]: Without dead ends: 223 [2020-10-22 01:22:14,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4067 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4258, Invalid=9548, Unknown=0, NotChecked=0, Total=13806 [2020-10-22 01:22:14,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-22 01:22:14,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 105. [2020-10-22 01:22:14,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-22 01:22:14,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-22 01:22:14,416 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 45 [2020-10-22 01:22:14,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:22:14,416 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-22 01:22:14,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-22 01:22:14,416 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-22 01:22:14,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-22 01:22:14,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:22:14,417 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:22:14,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-22 01:22:14,628 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:22:14,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:22:14,628 INFO L82 PathProgramCache]: Analyzing trace with hash -610554105, now seen corresponding path program 89 times [2020-10-22 01:22:14,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:22:14,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795182732] [2020-10-22 01:22:14,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:22:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:22:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:22:15,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795182732] [2020-10-22 01:22:15,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339809577] [2020-10-22 01:22:15,632 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:22:15,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-10-22 01:22:15,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:22:15,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-22 01:22:15,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:22:15,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:22:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:22:15,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:22:15,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-10-22 01:22:15,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1350139592] [2020-10-22 01:22:15,834 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:22:15,837 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:22:15,888 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 57 transitions. [2020-10-22 01:22:15,888 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:22:15,941 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:22:15,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-22 01:22:15,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:22:15,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-22 01:22:15,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2020-10-22 01:22:15,942 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 41 states. [2020-10-22 01:22:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:22:20,161 INFO L93 Difference]: Finished difference Result 192 states and 473 transitions. [2020-10-22 01:22:20,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-22 01:22:20,162 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 45 [2020-10-22 01:22:20,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:22:20,163 INFO L225 Difference]: With dead ends: 192 [2020-10-22 01:22:20,163 INFO L226 Difference]: Without dead ends: 187 [2020-10-22 01:22:20,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3669 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4032, Invalid=9078, Unknown=0, NotChecked=0, Total=13110 [2020-10-22 01:22:20,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-22 01:22:20,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2020-10-22 01:22:20,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-22 01:22:20,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 377 transitions. [2020-10-22 01:22:20,168 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 377 transitions. Word has length 45 [2020-10-22 01:22:20,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:22:20,168 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 377 transitions. [2020-10-22 01:22:20,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-22 01:22:20,168 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 377 transitions. [2020-10-22 01:22:20,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-22 01:22:20,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:22:20,169 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:22:20,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:22:20,370 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:22:20,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:22:20,371 INFO L82 PathProgramCache]: Analyzing trace with hash 963507588, now seen corresponding path program 90 times [2020-10-22 01:22:20,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:22:20,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793665847] [2020-10-22 01:22:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:22:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:22:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:22:21,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793665847] [2020-10-22 01:22:21,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659583047] [2020-10-22 01:22:21,942 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:22:22,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-10-22 01:22:22,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:22:22,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-22 01:22:22,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:22:22,038 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:22:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:22:22,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:22:22,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2020-10-22 01:22:22,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1424809838] [2020-10-22 01:22:22,057 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:22:22,060 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:22:22,080 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 61 transitions. [2020-10-22 01:22:22,080 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:22:22,084 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:22:22,084 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:22:22,232 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:22:22,233 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:22:22,234 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [43480#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-22 01:22:22,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-22 01:22:22,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:22:22,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-22 01:22:22,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=1361, Unknown=0, NotChecked=0, Total=1806 [2020-10-22 01:22:22,235 INFO L87 Difference]: Start difference. First operand 145 states and 377 transitions. Second operand 43 states. [2020-10-22 01:22:24,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:22:24,419 INFO L93 Difference]: Finished difference Result 192 states and 471 transitions. [2020-10-22 01:22:24,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-22 01:22:24,419 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-10-22 01:22:24,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:22:24,420 INFO L225 Difference]: With dead ends: 192 [2020-10-22 01:22:24,421 INFO L226 Difference]: Without dead ends: 186 [2020-10-22 01:22:24,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2110, Invalid=4696, Unknown=0, NotChecked=0, Total=6806 [2020-10-22 01:22:24,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-22 01:22:24,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 149. [2020-10-22 01:22:24,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-22 01:22:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 385 transitions. [2020-10-22 01:22:24,424 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 385 transitions. Word has length 46 [2020-10-22 01:22:24,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:22:24,425 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 385 transitions. [2020-10-22 01:22:24,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-22 01:22:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 385 transitions. [2020-10-22 01:22:24,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-22 01:22:24,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:22:24,425 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:22:24,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:22:24,627 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:22:24,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:22:24,628 INFO L82 PathProgramCache]: Analyzing trace with hash 64786326, now seen corresponding path program 91 times [2020-10-22 01:22:24,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:22:24,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764312014] [2020-10-22 01:22:24,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:22:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:22:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:22:25,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764312014] [2020-10-22 01:22:25,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746704547] [2020-10-22 01:22:25,786 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:22:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:22:25,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-22 01:22:25,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:22:25,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:22:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:22:26,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:22:26,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-10-22 01:22:26,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [60338105] [2020-10-22 01:22:26,010 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:22:26,018 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:22:26,050 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 54 transitions. [2020-10-22 01:22:26,051 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:22:26,087 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:22:26,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-22 01:22:26,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:22:26,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-22 01:22:26,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=1377, Unknown=0, NotChecked=0, Total=1806 [2020-10-22 01:22:26,089 INFO L87 Difference]: Start difference. First operand 149 states and 385 transitions. Second operand 42 states. [2020-10-22 01:22:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:22:30,635 INFO L93 Difference]: Finished difference Result 234 states and 559 transitions. [2020-10-22 01:22:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-22 01:22:30,637 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2020-10-22 01:22:30,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:22:30,639 INFO L225 Difference]: With dead ends: 234 [2020-10-22 01:22:30,639 INFO L226 Difference]: Without dead ends: 229 [2020-10-22 01:22:30,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4244 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4436, Invalid=9844, Unknown=0, NotChecked=0, Total=14280 [2020-10-22 01:22:30,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-22 01:22:30,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 110. [2020-10-22 01:22:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-22 01:22:30,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 269 transitions. [2020-10-22 01:22:30,643 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 269 transitions. Word has length 46 [2020-10-22 01:22:30,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:22:30,643 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 269 transitions. [2020-10-22 01:22:30,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-22 01:22:30,643 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 269 transitions. [2020-10-22 01:22:30,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-22 01:22:30,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:22:30,644 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:22:30,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:22:30,845 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:22:30,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:22:30,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1747282856, now seen corresponding path program 92 times [2020-10-22 01:22:30,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:22:30,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113249792] [2020-10-22 01:22:30,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:22:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:22:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:22:31,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113249792] [2020-10-22 01:22:31,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895850206] [2020-10-22 01:22:31,882 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:22:31,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-22 01:22:31,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:22:31,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-22 01:22:31,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:22:32,017 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-22 01:22:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:22:32,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:22:32,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-10-22 01:22:32,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1482924819] [2020-10-22 01:22:32,057 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:22:32,060 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:22:32,080 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 60 transitions. [2020-10-22 01:22:32,080 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:22:32,189 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45015#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 43))] [2020-10-22 01:22:32,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-22 01:22:32,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:22:32,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-22 01:22:32,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=1461, Unknown=0, NotChecked=0, Total=1892 [2020-10-22 01:22:32,190 INFO L87 Difference]: Start difference. First operand 110 states and 269 transitions. Second operand 43 states. [2020-10-22 01:22:36,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:22:36,885 INFO L93 Difference]: Finished difference Result 242 states and 577 transitions. [2020-10-22 01:22:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-22 01:22:36,886 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-10-22 01:22:36,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:22:36,888 INFO L225 Difference]: With dead ends: 242 [2020-10-22 01:22:36,888 INFO L226 Difference]: Without dead ends: 233 [2020-10-22 01:22:36,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3912 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4285, Invalid=9757, Unknown=0, NotChecked=0, Total=14042 [2020-10-22 01:22:36,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-22 01:22:36,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 150. [2020-10-22 01:22:36,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-22 01:22:36,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 389 transitions. [2020-10-22 01:22:36,892 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 389 transitions. Word has length 46 [2020-10-22 01:22:36,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:22:36,892 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 389 transitions. [2020-10-22 01:22:36,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-22 01:22:36,892 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 389 transitions. [2020-10-22 01:22:36,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-22 01:22:36,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:22:36,893 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:22:37,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:22:37,093 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:22:37,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:22:37,094 INFO L82 PathProgramCache]: Analyzing trace with hash 2008401321, now seen corresponding path program 93 times [2020-10-22 01:22:37,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:22:37,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421468273] [2020-10-22 01:22:37,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:22:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:22:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:22:38,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421468273] [2020-10-22 01:22:38,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53692096] [2020-10-22 01:22:38,210 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:22:38,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2020-10-22 01:22:38,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:22:38,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 44 conjunts are in the unsatisfiable core [2020-10-22 01:22:38,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:22:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:22:38,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:22:38,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-10-22 01:22:38,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [840283700] [2020-10-22 01:22:38,409 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:22:38,412 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:22:38,431 INFO L252 McrAutomatonBuilder]: Finished intersection with 53 states and 57 transitions. [2020-10-22 01:22:38,431 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:22:38,508 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45890#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 41))] [2020-10-22 01:22:38,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-22 01:22:38,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:22:38,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-22 01:22:38,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1528, Unknown=0, NotChecked=0, Total=1980 [2020-10-22 01:22:38,509 INFO L87 Difference]: Start difference. First operand 150 states and 389 transitions. Second operand 44 states. [2020-10-22 01:22:43,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:22:43,264 INFO L93 Difference]: Finished difference Result 242 states and 577 transitions. [2020-10-22 01:22:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-10-22 01:22:43,265 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-10-22 01:22:43,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:22:43,266 INFO L225 Difference]: With dead ends: 242 [2020-10-22 01:22:43,266 INFO L226 Difference]: Without dead ends: 233 [2020-10-22 01:22:43,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4504 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4702, Invalid=10550, Unknown=0, NotChecked=0, Total=15252 [2020-10-22 01:22:43,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-22 01:22:43,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 109. [2020-10-22 01:22:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-22 01:22:43,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 267 transitions. [2020-10-22 01:22:43,270 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 267 transitions. Word has length 47 [2020-10-22 01:22:43,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:22:43,270 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 267 transitions. [2020-10-22 01:22:43,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-22 01:22:43,270 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 267 transitions. [2020-10-22 01:22:43,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-22 01:22:43,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:22:43,271 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:22:43,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2020-10-22 01:22:43,472 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:22:43,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:22:43,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1668834410, now seen corresponding path program 94 times [2020-10-22 01:22:43,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:22:43,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594766575] [2020-10-22 01:22:43,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:22:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:22:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:22:44,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594766575] [2020-10-22 01:22:44,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039725312] [2020-10-22 01:22:44,602 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:22:44,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-22 01:22:44,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:22:44,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-22 01:22:44,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:22:44,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:22:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:22:44,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:22:44,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-10-22 01:22:44,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [175065677] [2020-10-22 01:22:44,786 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:22:44,791 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:22:44,811 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 59 transitions. [2020-10-22 01:22:44,811 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:22:44,913 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-22 01:22:44,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-22 01:22:44,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:22:44,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-22 01:22:44,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1442, Unknown=0, NotChecked=0, Total=1892 [2020-10-22 01:22:44,915 INFO L87 Difference]: Start difference. First operand 109 states and 267 transitions. Second operand 43 states. [2020-10-22 01:22:49,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:22:49,686 INFO L93 Difference]: Finished difference Result 200 states and 493 transitions. [2020-10-22 01:22:49,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-22 01:22:49,688 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 47 [2020-10-22 01:22:49,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:22:49,689 INFO L225 Difference]: With dead ends: 200 [2020-10-22 01:22:49,689 INFO L226 Difference]: Without dead ends: 195 [2020-10-22 01:22:49,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4464, Invalid=10056, Unknown=0, NotChecked=0, Total=14520 [2020-10-22 01:22:49,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-22 01:22:49,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 151. [2020-10-22 01:22:49,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-22 01:22:49,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 393 transitions. [2020-10-22 01:22:49,693 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 393 transitions. Word has length 47 [2020-10-22 01:22:49,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:22:49,693 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 393 transitions. [2020-10-22 01:22:49,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-22 01:22:49,693 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 393 transitions. [2020-10-22 01:22:49,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-22 01:22:49,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:22:49,694 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:22:49,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:22:49,894 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:22:49,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:22:49,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1782137625, now seen corresponding path program 95 times [2020-10-22 01:22:49,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:22:49,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543993678] [2020-10-22 01:22:49,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:22:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-22 01:22:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:22:51,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543993678] [2020-10-22 01:22:51,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816734738] [2020-10-22 01:22:51,380 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-22 01:22:51,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-10-22 01:22:51,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-22 01:22:51,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 45 conjunts are in the unsatisfiable core [2020-10-22 01:22:51,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-22 01:22:51,477 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-22 01:22:51,502 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-22 01:22:51,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-22 01:22:51,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2020-10-22 01:22:51,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1936713224] [2020-10-22 01:22:51,503 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-22 01:22:51,508 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-22 01:22:51,583 INFO L252 McrAutomatonBuilder]: Finished intersection with 56 states and 63 transitions. [2020-10-22 01:22:51,584 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-22 01:22:51,627 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:22:51,628 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:22:51,697 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-22 01:22:51,698 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-22 01:22:51,745 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [47532#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-10-22 01:22:51,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-22 01:22:51,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-22 01:22:51,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-22 01:22:51,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=1492, Unknown=0, NotChecked=0, Total=1980 [2020-10-22 01:22:51,746 INFO L87 Difference]: Start difference. First operand 151 states and 393 transitions. Second operand 45 states. [2020-10-22 01:22:54,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-22 01:22:54,180 INFO L93 Difference]: Finished difference Result 200 states and 491 transitions. [2020-10-22 01:22:54,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-22 01:22:54,181 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2020-10-22 01:22:54,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-22 01:22:54,182 INFO L225 Difference]: With dead ends: 200 [2020-10-22 01:22:54,182 INFO L226 Difference]: Without dead ends: 194 [2020-10-22 01:22:54,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2320, Invalid=5162, Unknown=0, NotChecked=0, Total=7482 [2020-10-22 01:22:54,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-22 01:22:54,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 155. [2020-10-22 01:22:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-22 01:22:54,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 401 transitions. [2020-10-22 01:22:54,186 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 401 transitions. Word has length 48 [2020-10-22 01:22:54,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-22 01:22:54,186 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 401 transitions. [2020-10-22 01:22:54,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-22 01:22:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 401 transitions. [2020-10-22 01:22:54,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-22 01:22:54,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-22 01:22:54,187 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-22 01:22:54,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2020-10-22 01:22:54,394 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-22 01:22:54,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-22 01:22:54,394 INFO L82 PathProgramCache]: Analyzing trace with hash 2130926905, now seen corresponding path program 96 times [2020-10-22 01:22:54,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-22 01:22:54,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606296935] [2020-10-22 01:22:54,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-22 01:22:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2020-10-22 01:22:55,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2020-10-22 01:22:55,011 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-22 01:22:55,015 WARN L235 ceAbstractionStarter]: Timeout [2020-10-22 01:22:55,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 01:22:55 BasicIcfg [2020-10-22 01:22:55,015 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-22 01:22:55,017 INFO L168 Benchmark]: Toolchain (without parser) took 244876.47 ms. Allocated memory was 140.0 MB in the beginning and 530.6 MB in the end (delta: 390.6 MB). Free memory was 101.7 MB in the beginning and 397.4 MB in the end (delta: -295.6 MB). Peak memory consumption was 471.8 MB. Max. memory is 7.1 GB. [2020-10-22 01:22:55,017 INFO L168 Benchmark]: CDTParser took 3.10 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-22 01:22:55,017 INFO L168 Benchmark]: CACSL2BoogieTranslator took 742.08 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 100.9 MB in the beginning and 161.1 MB in the end (delta: -60.2 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2020-10-22 01:22:55,018 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.33 ms. Allocated memory is still 202.9 MB. Free memory was 160.4 MB in the beginning and 158.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-22 01:22:55,018 INFO L168 Benchmark]: Boogie Preprocessor took 30.67 ms. Allocated memory is still 202.9 MB. Free memory was 158.4 MB in the beginning and 157.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-22 01:22:55,018 INFO L168 Benchmark]: RCFGBuilder took 477.78 ms. Allocated memory is still 202.9 MB. Free memory was 157.1 MB in the beginning and 134.7 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-10-22 01:22:55,019 INFO L168 Benchmark]: TraceAbstraction took 243564.97 ms. Allocated memory was 202.9 MB in the beginning and 530.6 MB in the end (delta: 327.7 MB). Free memory was 134.1 MB in the beginning and 397.4 MB in the end (delta: -263.3 MB). Peak memory consumption was 441.3 MB. Max. memory is 7.1 GB. [2020-10-22 01:22:55,021 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 3.10 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 742.08 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 100.9 MB in the beginning and 161.1 MB in the end (delta: -60.2 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 50.33 ms. Allocated memory is still 202.9 MB. Free memory was 160.4 MB in the beginning and 158.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.67 ms. Allocated memory is still 202.9 MB. Free memory was 158.4 MB in the beginning and 157.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 477.78 ms. Allocated memory is still 202.9 MB. Free memory was 157.1 MB in the beginning and 134.7 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 243564.97 ms. Allocated memory was 202.9 MB in the beginning and 530.6 MB in the end (delta: 327.7 MB). Free memory was 134.1 MB in the beginning and 397.4 MB in the end (delta: -263.3 MB). Peak memory consumption was 441.3 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 - TimeoutResultAtElement [Line: 685]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 685). Cancelled while BasicCegarLoop was analyzing trace of length 49 with TraceHistMax 20,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 29 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 243.4s, OverallIterations: 98, TraceHistogramMax: 20, AutomataDifference: 157.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 1374 SDtfs, 8687 SDslu, 11440 SDs, 0 SdLazy, 13085 SolverSat, 10208 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8926 GetRequests, 2975 SyntacticMatches, 75 SemanticMatches, 5876 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125946 ImplicationChecksByTransitivity, 173.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=155occurred in iteration=97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 97 MinimizatonAttempts, 4358 StatesRemovedByMinimization, 96 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 46.2s InterpolantComputationTime, 5466 NumberOfCodeBlocks, 5466 NumberOfCodeBlocksAsserted, 679 NumberOfCheckSat, 5276 ConstructedInterpolants, 0 QuantifiedInterpolants, 692894 SizeOfPredicates, 1991 NumberOfNonLiveVariables, 17114 ConjunctsInSsa, 2371 ConjunctsInUnsatCore, 190 InterpolantComputations, 4 PerfectInterpolantSequences, 0/24320 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown