/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/sigma.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c7e336b [2020-10-05 23:07:48,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-05 23:07:48,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-05 23:07:48,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-05 23:07:48,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-05 23:07:48,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-05 23:07:48,785 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-05 23:07:48,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-05 23:07:48,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-05 23:07:48,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-05 23:07:48,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-05 23:07:48,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-05 23:07:48,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-05 23:07:48,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-05 23:07:48,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-05 23:07:48,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-05 23:07:48,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-05 23:07:48,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-05 23:07:48,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-05 23:07:48,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-05 23:07:48,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-05 23:07:48,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-05 23:07:48,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-05 23:07:48,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-05 23:07:48,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-05 23:07:48,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-05 23:07:48,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-05 23:07:48,825 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-05 23:07:48,825 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-05 23:07:48,826 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-05 23:07:48,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-05 23:07:48,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-05 23:07:48,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-05 23:07:48,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-05 23:07:48,830 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-05 23:07:48,831 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-05 23:07:48,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-05 23:07:48,832 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-05 23:07:48,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-05 23:07:48,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-05 23:07:48,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-05 23:07:48,835 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.epf [2020-10-05 23:07:48,879 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-05 23:07:48,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-05 23:07:48,881 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-05 23:07:48,881 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-05 23:07:48,881 INFO L138 SettingsManager]: * Use SBE=true [2020-10-05 23:07:48,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-05 23:07:48,882 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-05 23:07:48,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-05 23:07:48,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-05 23:07:48,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-05 23:07:48,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-05 23:07:48,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-05 23:07:48,884 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-05 23:07:48,884 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-05 23:07:48,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-05 23:07:48,885 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-05 23:07:48,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-05 23:07:48,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-05 23:07:48,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-05 23:07:48,885 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-05 23:07:48,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-05 23:07:48,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-05 23:07:48,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-05 23:07:48,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-05 23:07:48,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-05 23:07:48,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-05 23:07:48,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-05 23:07:48,887 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-05 23:07:48,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-05 23:07:49,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-05 23:07:49,172 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-05 23:07:49,176 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-05 23:07:49,177 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-05 23:07:49,177 INFO L275 PluginConnector]: CDTParser initialized [2020-10-05 23:07:49,178 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/sigma.i [2020-10-05 23:07:49,239 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3e21395f/c3ab1dadd4f94556b4bf044d96786eb9/FLAGc8e92a373 [2020-10-05 23:07:49,782 INFO L306 CDTParser]: Found 1 translation units. [2020-10-05 23:07:49,783 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/sigma.i [2020-10-05 23:07:49,817 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3e21395f/c3ab1dadd4f94556b4bf044d96786eb9/FLAGc8e92a373 [2020-10-05 23:07:50,102 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3e21395f/c3ab1dadd4f94556b4bf044d96786eb9 [2020-10-05 23:07:50,111 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-05 23:07:50,113 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-05 23:07:50,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-05 23:07:50,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-05 23:07:50,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-05 23:07:50,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 11:07:50" (1/1) ... [2020-10-05 23:07:50,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3918b12e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:50, skipping insertion in model container [2020-10-05 23:07:50,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 11:07:50" (1/1) ... [2020-10-05 23:07:50,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-05 23:07:50,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-05 23:07:50,751 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 23:07:50,763 INFO L203 MainTranslator]: Completed pre-run [2020-10-05 23:07:50,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 23:07:50,991 INFO L208 MainTranslator]: Completed translation [2020-10-05 23:07:50,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:50 WrapperNode [2020-10-05 23:07:50,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-05 23:07:50,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-05 23:07:50,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-05 23:07:50,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-05 23:07:51,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:50" (1/1) ... [2020-10-05 23:07:51,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:50" (1/1) ... [2020-10-05 23:07:51,046 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-05 23:07:51,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-05 23:07:51,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-05 23:07:51,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-05 23:07:51,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:50" (1/1) ... [2020-10-05 23:07:51,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:50" (1/1) ... [2020-10-05 23:07:51,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:50" (1/1) ... [2020-10-05 23:07:51,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:50" (1/1) ... [2020-10-05 23:07:51,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:50" (1/1) ... [2020-10-05 23:07:51,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:50" (1/1) ... [2020-10-05 23:07:51,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:50" (1/1) ... [2020-10-05 23:07:51,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-05 23:07:51,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-05 23:07:51,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-05 23:07:51,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-05 23:07:51,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:50" (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 [2020-10-05 23:07:51,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-05 23:07:51,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-05 23:07:51,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-05 23:07:51,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-05 23:07:51,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-05 23:07:51,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-05 23:07:51,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-05 23:07:51,153 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2020-10-05 23:07:51,154 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2020-10-05 23:07:51,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-05 23:07:51,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-05 23:07:51,159 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-05 23:07:51,580 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-05 23:07:51,580 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-05 23:07:51,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 11:07:51 BoogieIcfgContainer [2020-10-05 23:07:51,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-05 23:07:51,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-05 23:07:51,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-05 23:07:51,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-05 23:07:51,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 11:07:50" (1/3) ... [2020-10-05 23:07:51,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26085232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 11:07:51, skipping insertion in model container [2020-10-05 23:07:51,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:07:50" (2/3) ... [2020-10-05 23:07:51,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26085232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 11:07:51, skipping insertion in model container [2020-10-05 23:07:51,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 11:07:51" (3/3) ... [2020-10-05 23:07:51,591 INFO L109 eAbstractionObserver]: Analyzing ICFG sigma.i [2020-10-05 23:07:51,601 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-05 23:07:51,602 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-05 23:07:51,609 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-05 23:07:51,610 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-05 23:07:51,635 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:51,635 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:51,635 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:51,636 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:51,636 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:51,636 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:51,640 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:51,640 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:51,641 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:51,641 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:51,663 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-05 23:07:51,682 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:07:51,682 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:07:51,682 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:07:51,683 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-05 23:07:51,683 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:07:51,683 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:07:51,683 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:07:51,683 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:07:51,696 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 84 transitions, 176 flow [2020-10-05 23:07:51,698 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 79 places, 84 transitions, 176 flow [2020-10-05 23:07:51,752 INFO L129 PetriNetUnfolder]: 13/121 cut-off events. [2020-10-05 23:07:51,753 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-05 23:07:51,757 INFO L80 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 121 events. 13/121 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 205 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 67. Up to 4 conditions per place. [2020-10-05 23:07:51,760 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 79 places, 84 transitions, 176 flow [2020-10-05 23:07:51,791 INFO L129 PetriNetUnfolder]: 13/121 cut-off events. [2020-10-05 23:07:51,791 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-05 23:07:51,792 INFO L80 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 121 events. 13/121 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 205 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 67. Up to 4 conditions per place. [2020-10-05 23:07:51,794 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 344 [2020-10-05 23:07:51,796 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:07:53,290 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-05 23:07:53,677 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-10-05 23:07:53,780 INFO L206 etLargeBlockEncoding]: Checked pairs total: 293 [2020-10-05 23:07:53,780 INFO L214 etLargeBlockEncoding]: Total number of compositions: 77 [2020-10-05 23:07:53,784 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 17 transitions, 42 flow [2020-10-05 23:07:53,793 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 36 states. [2020-10-05 23:07:53,795 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-05 23:07:53,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-05 23:07:53,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:07:53,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-05 23:07:53,802 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:07:53,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:07:53,808 INFO L82 PathProgramCache]: Analyzing trace with hash 10051566, now seen corresponding path program 1 times [2020-10-05 23:07:53,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:07:53,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271567503] [2020-10-05 23:07:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:07:53,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:07:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:07:53,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271567503] [2020-10-05 23:07:53,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:07:53,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:07:53,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170928342] [2020-10-05 23:07:53,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:07:53,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:07:54,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:07:54,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:07:54,015 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-05 23:07:54,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:07:54,061 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2020-10-05 23:07:54,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:07:54,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-05 23:07:54,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:07:54,073 INFO L225 Difference]: With dead ends: 36 [2020-10-05 23:07:54,073 INFO L226 Difference]: Without dead ends: 31 [2020-10-05 23:07:54,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:07:54,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-05 23:07:54,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-05 23:07:54,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-05 23:07:54,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2020-10-05 23:07:54,113 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 4 [2020-10-05 23:07:54,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:07:54,113 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2020-10-05 23:07:54,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:07:54,114 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2020-10-05 23:07:54,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-05 23:07:54,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:07:54,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:07:54,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-05 23:07:54,115 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:07:54,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:07:54,116 INFO L82 PathProgramCache]: Analyzing trace with hash -352775593, now seen corresponding path program 1 times [2020-10-05 23:07:54,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:07:54,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450049993] [2020-10-05 23:07:54,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:07:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:07:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:07:54,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450049993] [2020-10-05 23:07:54,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:07:54,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:07:54,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463981331] [2020-10-05 23:07:54,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:07:54,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:07:54,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:07:54,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:07:54,224 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 4 states. [2020-10-05 23:07:54,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:07:54,255 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2020-10-05 23:07:54,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:07:54,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-10-05 23:07:54,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:07:54,257 INFO L225 Difference]: With dead ends: 28 [2020-10-05 23:07:54,257 INFO L226 Difference]: Without dead ends: 28 [2020-10-05 23:07:54,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:07:54,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-05 23:07:54,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-05 23:07:54,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-05 23:07:54,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-05 23:07:54,264 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 9 [2020-10-05 23:07:54,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:07:54,264 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-05 23:07:54,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:07:54,264 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-05 23:07:54,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:07:54,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:07:54,265 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2020-10-05 23:07:54,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-05 23:07:54,266 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:07:54,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:07:54,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1949275916, now seen corresponding path program 1 times [2020-10-05 23:07:54,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:07:54,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262731466] [2020-10-05 23:07:54,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:07:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:07:54,305 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:07:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:07:54,334 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:07:54,374 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-05 23:07:54,374 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-05 23:07:54,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-05 23:07:54,375 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-05 23:07:54,376 WARN L363 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-05 23:07:54,376 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-10-05 23:07:54,382 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:54,382 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:54,383 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:54,383 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:54,383 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:54,383 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:54,383 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:54,384 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:54,384 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:54,384 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:54,385 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:54,385 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:54,385 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:54,385 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:54,386 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:54,386 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:54,390 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:54,390 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:54,390 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:54,390 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:54,392 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-05 23:07:54,392 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:07:54,393 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:07:54,393 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:07:54,393 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-05 23:07:54,393 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:07:54,393 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:07:54,393 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:07:54,393 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:07:54,397 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 90 transitions, 198 flow [2020-10-05 23:07:54,397 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 86 places, 90 transitions, 198 flow [2020-10-05 23:07:54,435 INFO L129 PetriNetUnfolder]: 24/209 cut-off events. [2020-10-05 23:07:54,435 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-05 23:07:54,436 INFO L80 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 209 events. 24/209 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 438 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 123. Up to 8 conditions per place. [2020-10-05 23:07:54,439 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 86 places, 90 transitions, 198 flow [2020-10-05 23:07:54,469 INFO L129 PetriNetUnfolder]: 24/209 cut-off events. [2020-10-05 23:07:54,470 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-05 23:07:54,471 INFO L80 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 209 events. 24/209 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 438 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 123. Up to 8 conditions per place. [2020-10-05 23:07:54,473 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 824 [2020-10-05 23:07:54,473 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:07:55,859 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-05 23:07:56,131 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-05 23:07:56,438 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2020-10-05 23:07:56,558 INFO L206 etLargeBlockEncoding]: Checked pairs total: 676 [2020-10-05 23:07:56,559 INFO L214 etLargeBlockEncoding]: Total number of compositions: 79 [2020-10-05 23:07:56,559 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 22 transitions, 62 flow [2020-10-05 23:07:56,564 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 109 states. [2020-10-05 23:07:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states. [2020-10-05 23:07:56,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-05 23:07:56,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:07:56,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-05 23:07:56,565 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:07:56,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:07:56,565 INFO L82 PathProgramCache]: Analyzing trace with hash 15623651, now seen corresponding path program 1 times [2020-10-05 23:07:56,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:07:56,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618020615] [2020-10-05 23:07:56,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:07:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:07:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:07:56,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618020615] [2020-10-05 23:07:56,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:07:56,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:07:56,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906084592] [2020-10-05 23:07:56,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:07:56,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:07:56,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:07:56,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:07:56,602 INFO L87 Difference]: Start difference. First operand 109 states. Second operand 3 states. [2020-10-05 23:07:56,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:07:56,628 INFO L93 Difference]: Finished difference Result 109 states and 191 transitions. [2020-10-05 23:07:56,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:07:56,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-05 23:07:56,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:07:56,632 INFO L225 Difference]: With dead ends: 109 [2020-10-05 23:07:56,633 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 23:07:56,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:07:56,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 23:07:56,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-05 23:07:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-05 23:07:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 174 transitions. [2020-10-05 23:07:56,658 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 174 transitions. Word has length 4 [2020-10-05 23:07:56,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:07:56,658 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 174 transitions. [2020-10-05 23:07:56,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:07:56,658 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 174 transitions. [2020-10-05 23:07:56,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:07:56,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:07:56,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:07:56,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-05 23:07:56,660 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:07:56,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:07:56,661 INFO L82 PathProgramCache]: Analyzing trace with hash 125559316, now seen corresponding path program 1 times [2020-10-05 23:07:56,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:07:56,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965569142] [2020-10-05 23:07:56,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:07:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:07:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:07:56,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965569142] [2020-10-05 23:07:56,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:07:56,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:07:56,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789708931] [2020-10-05 23:07:56,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:07:56,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:07:56,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:07:56,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:07:56,716 INFO L87 Difference]: Start difference. First operand 98 states and 174 transitions. Second operand 4 states. [2020-10-05 23:07:56,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:07:56,761 INFO L93 Difference]: Finished difference Result 103 states and 171 transitions. [2020-10-05 23:07:56,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:07:56,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-05 23:07:56,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:07:56,764 INFO L225 Difference]: With dead ends: 103 [2020-10-05 23:07:56,764 INFO L226 Difference]: Without dead ends: 103 [2020-10-05 23:07:56,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:07:56,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-05 23:07:56,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2020-10-05 23:07:56,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-05 23:07:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 164 transitions. [2020-10-05 23:07:56,777 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 164 transitions. Word has length 10 [2020-10-05 23:07:56,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:07:56,777 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 164 transitions. [2020-10-05 23:07:56,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:07:56,777 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 164 transitions. [2020-10-05 23:07:56,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:07:56,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:07:56,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:07:56,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-05 23:07:56,780 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:07:56,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:07:56,780 INFO L82 PathProgramCache]: Analyzing trace with hash 823605760, now seen corresponding path program 1 times [2020-10-05 23:07:56,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:07:56,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843103395] [2020-10-05 23:07:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:07:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:07:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:07:56,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843103395] [2020-10-05 23:07:56,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695857283] [2020-10-05 23:07:56,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:07:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:07:56,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-05 23:07:56,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:07:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:07:56,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:07:56,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-05 23:07:56,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403139015] [2020-10-05 23:07:56,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:07:56,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:07:56,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:07:56,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:07:56,964 INFO L87 Difference]: Start difference. First operand 97 states and 164 transitions. Second operand 6 states. [2020-10-05 23:07:57,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:07:57,008 INFO L93 Difference]: Finished difference Result 95 states and 159 transitions. [2020-10-05 23:07:57,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:07:57,009 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-05 23:07:57,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:07:57,010 INFO L225 Difference]: With dead ends: 95 [2020-10-05 23:07:57,010 INFO L226 Difference]: Without dead ends: 95 [2020-10-05 23:07:57,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:07:57,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-05 23:07:57,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-05 23:07:57,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-05 23:07:57,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 159 transitions. [2020-10-05 23:07:57,019 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 159 transitions. Word has length 17 [2020-10-05 23:07:57,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:07:57,020 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 159 transitions. [2020-10-05 23:07:57,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:07:57,020 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 159 transitions. [2020-10-05 23:07:57,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:07:57,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:07:57,021 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2020-10-05 23:07:57,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-05 23:07:57,235 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:07:57,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:07:57,235 INFO L82 PathProgramCache]: Analyzing trace with hash 26114190, now seen corresponding path program 1 times [2020-10-05 23:07:57,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:07:57,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055353914] [2020-10-05 23:07:57,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:07:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:07:57,276 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:07:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:07:57,321 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:07:57,338 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-05 23:07:57,338 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-05 23:07:57,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-05 23:07:57,339 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-05 23:07:57,343 WARN L363 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-05 23:07:57,344 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-10-05 23:07:57,357 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,357 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,358 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,358 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,358 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,358 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,358 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,359 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,359 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,359 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,361 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,361 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,362 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,362 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,362 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,362 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,362 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,363 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,363 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,363 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,363 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,363 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,368 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,369 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,369 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,369 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,370 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,370 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,370 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,371 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:07:57,374 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-05 23:07:57,374 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:07:57,374 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:07:57,375 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:07:57,375 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-05 23:07:57,375 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:07:57,375 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:07:57,375 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:07:57,375 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:07:57,377 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 96 transitions, 222 flow [2020-10-05 23:07:57,381 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 93 places, 96 transitions, 222 flow [2020-10-05 23:07:57,431 INFO L129 PetriNetUnfolder]: 46/368 cut-off events. [2020-10-05 23:07:57,431 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-05 23:07:57,432 INFO L80 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 368 events. 46/368 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1021 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 217. Up to 16 conditions per place. [2020-10-05 23:07:57,436 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 93 places, 96 transitions, 222 flow [2020-10-05 23:07:57,471 INFO L129 PetriNetUnfolder]: 46/368 cut-off events. [2020-10-05 23:07:57,472 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-05 23:07:57,473 INFO L80 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 368 events. 46/368 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1021 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 217. Up to 16 conditions per place. [2020-10-05 23:07:57,477 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1320 [2020-10-05 23:07:57,477 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:07:59,176 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-10-05 23:07:59,449 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-05 23:07:59,572 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-05 23:07:59,590 INFO L206 etLargeBlockEncoding]: Checked pairs total: 1092 [2020-10-05 23:07:59,590 INFO L214 etLargeBlockEncoding]: Total number of compositions: 84 [2020-10-05 23:07:59,590 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 80 flow [2020-10-05 23:07:59,602 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 297 states. [2020-10-05 23:07:59,602 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states. [2020-10-05 23:07:59,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-05 23:07:59,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:07:59,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-05 23:07:59,603 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:07:59,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:07:59,604 INFO L82 PathProgramCache]: Analyzing trace with hash 21531642, now seen corresponding path program 1 times [2020-10-05 23:07:59,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:07:59,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850026013] [2020-10-05 23:07:59,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:07:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:07:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:07:59,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850026013] [2020-10-05 23:07:59,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:07:59,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:07:59,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933290485] [2020-10-05 23:07:59,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:07:59,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:07:59,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:07:59,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:07:59,630 INFO L87 Difference]: Start difference. First operand 297 states. Second operand 3 states. [2020-10-05 23:07:59,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:07:59,655 INFO L93 Difference]: Finished difference Result 297 states and 636 transitions. [2020-10-05 23:07:59,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:07:59,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-05 23:07:59,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:07:59,659 INFO L225 Difference]: With dead ends: 297 [2020-10-05 23:07:59,659 INFO L226 Difference]: Without dead ends: 268 [2020-10-05 23:07:59,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:07:59,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-05 23:07:59,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2020-10-05 23:07:59,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-05 23:07:59,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 580 transitions. [2020-10-05 23:07:59,679 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 580 transitions. Word has length 4 [2020-10-05 23:07:59,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:07:59,680 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 580 transitions. [2020-10-05 23:07:59,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:07:59,680 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 580 transitions. [2020-10-05 23:07:59,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:07:59,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:07:59,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:07:59,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-05 23:07:59,681 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:07:59,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:07:59,681 INFO L82 PathProgramCache]: Analyzing trace with hash 656916489, now seen corresponding path program 1 times [2020-10-05 23:07:59,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:07:59,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130684707] [2020-10-05 23:07:59,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:07:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:07:59,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:07:59,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130684707] [2020-10-05 23:07:59,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:07:59,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:07:59,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948263866] [2020-10-05 23:07:59,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:07:59,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:07:59,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:07:59,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:07:59,714 INFO L87 Difference]: Start difference. First operand 268 states and 580 transitions. Second operand 4 states. [2020-10-05 23:07:59,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:07:59,746 INFO L93 Difference]: Finished difference Result 299 states and 612 transitions. [2020-10-05 23:07:59,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:07:59,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-05 23:07:59,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:07:59,749 INFO L225 Difference]: With dead ends: 299 [2020-10-05 23:07:59,749 INFO L226 Difference]: Without dead ends: 299 [2020-10-05 23:07:59,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:07:59,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-05 23:07:59,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 277. [2020-10-05 23:07:59,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-05 23:07:59,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 577 transitions. [2020-10-05 23:07:59,766 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 577 transitions. Word has length 10 [2020-10-05 23:07:59,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:07:59,766 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 577 transitions. [2020-10-05 23:07:59,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:07:59,767 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 577 transitions. [2020-10-05 23:07:59,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:07:59,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:07:59,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:07:59,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-05 23:07:59,768 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:07:59,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:07:59,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1586347520, now seen corresponding path program 1 times [2020-10-05 23:07:59,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:07:59,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384618118] [2020-10-05 23:07:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:07:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:07:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:07:59,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384618118] [2020-10-05 23:07:59,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141243462] [2020-10-05 23:07:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:07:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:07:59,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-05 23:07:59,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:07:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:07:59,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:07:59,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-05 23:07:59,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663645712] [2020-10-05 23:07:59,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:07:59,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:07:59,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:07:59,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:07:59,991 INFO L87 Difference]: Start difference. First operand 277 states and 577 transitions. Second operand 6 states. [2020-10-05 23:08:00,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:00,028 INFO L93 Difference]: Finished difference Result 275 states and 572 transitions. [2020-10-05 23:08:00,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:08:00,029 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-05 23:08:00,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:00,031 INFO L225 Difference]: With dead ends: 275 [2020-10-05 23:08:00,031 INFO L226 Difference]: Without dead ends: 275 [2020-10-05 23:08:00,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:08:00,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-05 23:08:00,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2020-10-05 23:08:00,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-05 23:08:00,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 572 transitions. [2020-10-05 23:08:00,054 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 572 transitions. Word has length 17 [2020-10-05 23:08:00,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:00,055 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 572 transitions. [2020-10-05 23:08:00,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:08:00,055 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 572 transitions. [2020-10-05 23:08:00,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:08:00,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:00,061 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:00,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-05 23:08:00,276 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:00,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:00,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1691264658, now seen corresponding path program 1 times [2020-10-05 23:08:00,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:00,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011279060] [2020-10-05 23:08:00,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:00,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:00,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011279060] [2020-10-05 23:08:00,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997355242] [2020-10-05 23:08:00,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:08:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:00,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-05 23:08:00,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:00,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:00,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-05 23:08:00,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396155734] [2020-10-05 23:08:00,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:08:00,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:00,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:08:00,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:08:00,463 INFO L87 Difference]: Start difference. First operand 275 states and 572 transitions. Second operand 8 states. [2020-10-05 23:08:00,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:00,503 INFO L93 Difference]: Finished difference Result 271 states and 560 transitions. [2020-10-05 23:08:00,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 23:08:00,504 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-05 23:08:00,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:00,506 INFO L225 Difference]: With dead ends: 271 [2020-10-05 23:08:00,506 INFO L226 Difference]: Without dead ends: 271 [2020-10-05 23:08:00,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:08:00,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-05 23:08:00,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2020-10-05 23:08:00,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-05 23:08:00,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 560 transitions. [2020-10-05 23:08:00,515 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 560 transitions. Word has length 23 [2020-10-05 23:08:00,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:00,515 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 560 transitions. [2020-10-05 23:08:00,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:08:00,516 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 560 transitions. [2020-10-05 23:08:00,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:08:00,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:00,517 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2020-10-05 23:08:00,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-05 23:08:00,732 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:00,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:00,733 INFO L82 PathProgramCache]: Analyzing trace with hash 539631963, now seen corresponding path program 1 times [2020-10-05 23:08:00,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:00,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980855236] [2020-10-05 23:08:00,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:08:00,755 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:08:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:08:00,774 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:08:00,783 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-05 23:08:00,783 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-05 23:08:00,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-05 23:08:00,784 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-05 23:08:00,784 WARN L363 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-05 23:08:00,785 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-10-05 23:08:00,792 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,792 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,792 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,792 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,792 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,793 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,793 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,793 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,793 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,793 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,793 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,794 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,794 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,794 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,794 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,794 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,794 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,794 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,795 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,795 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,795 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,795 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,795 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,795 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,796 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,796 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,796 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,796 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,798 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,798 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,798 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,798 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,799 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,799 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,800 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,800 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,801 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,801 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,801 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,801 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:00,805 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-05 23:08:00,805 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:08:00,805 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:08:00,806 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:08:00,806 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-05 23:08:00,806 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:08:00,806 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:08:00,806 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:08:00,806 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:08:00,807 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 102 transitions, 248 flow [2020-10-05 23:08:00,808 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 100 places, 102 transitions, 248 flow [2020-10-05 23:08:00,873 INFO L129 PetriNetUnfolder]: 92/671 cut-off events. [2020-10-05 23:08:00,873 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-05 23:08:00,875 INFO L80 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 671 events. 92/671 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2596 event pairs, 6 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 388. Up to 32 conditions per place. [2020-10-05 23:08:00,885 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 100 places, 102 transitions, 248 flow [2020-10-05 23:08:00,946 INFO L129 PetriNetUnfolder]: 92/671 cut-off events. [2020-10-05 23:08:00,947 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-05 23:08:00,949 INFO L80 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 671 events. 92/671 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2596 event pairs, 6 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 388. Up to 32 conditions per place. [2020-10-05 23:08:00,958 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1872 [2020-10-05 23:08:00,958 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:08:02,577 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-10-05 23:08:02,883 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2020-10-05 23:08:02,986 INFO L206 etLargeBlockEncoding]: Checked pairs total: 1730 [2020-10-05 23:08:02,986 INFO L214 etLargeBlockEncoding]: Total number of compositions: 84 [2020-10-05 23:08:02,987 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 100 flow [2020-10-05 23:08:03,013 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 817 states. [2020-10-05 23:08:03,014 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states. [2020-10-05 23:08:03,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-05 23:08:03,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:03,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-05 23:08:03,014 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:03,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:03,015 INFO L82 PathProgramCache]: Analyzing trace with hash 27625699, now seen corresponding path program 1 times [2020-10-05 23:08:03,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:03,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823168458] [2020-10-05 23:08:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:08:03,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823168458] [2020-10-05 23:08:03,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:08:03,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:08:03,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722747165] [2020-10-05 23:08:03,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:08:03,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:03,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:08:03,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:08:03,037 INFO L87 Difference]: Start difference. First operand 817 states. Second operand 3 states. [2020-10-05 23:08:03,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:03,064 INFO L93 Difference]: Finished difference Result 817 states and 2065 transitions. [2020-10-05 23:08:03,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:08:03,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-05 23:08:03,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:03,071 INFO L225 Difference]: With dead ends: 817 [2020-10-05 23:08:03,071 INFO L226 Difference]: Without dead ends: 734 [2020-10-05 23:08:03,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:08:03,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2020-10-05 23:08:03,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2020-10-05 23:08:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2020-10-05 23:08:03,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1874 transitions. [2020-10-05 23:08:03,101 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1874 transitions. Word has length 4 [2020-10-05 23:08:03,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:03,101 INFO L479 AbstractCegarLoop]: Abstraction has 734 states and 1874 transitions. [2020-10-05 23:08:03,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:08:03,102 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1874 transitions. [2020-10-05 23:08:03,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:08:03,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:03,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:03,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-05 23:08:03,103 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:03,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:03,103 INFO L82 PathProgramCache]: Analyzing trace with hash -399158139, now seen corresponding path program 1 times [2020-10-05 23:08:03,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:03,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27159261] [2020-10-05 23:08:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:08:03,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27159261] [2020-10-05 23:08:03,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:08:03,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:08:03,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384077632] [2020-10-05 23:08:03,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:08:03,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:03,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:08:03,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:08:03,136 INFO L87 Difference]: Start difference. First operand 734 states and 1874 transitions. Second operand 4 states. [2020-10-05 23:08:03,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:03,199 INFO L93 Difference]: Finished difference Result 843 states and 2061 transitions. [2020-10-05 23:08:03,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:08:03,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-05 23:08:03,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:03,206 INFO L225 Difference]: With dead ends: 843 [2020-10-05 23:08:03,206 INFO L226 Difference]: Without dead ends: 843 [2020-10-05 23:08:03,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:08:03,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-10-05 23:08:03,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 781. [2020-10-05 23:08:03,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 781 states. [2020-10-05 23:08:03,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1934 transitions. [2020-10-05 23:08:03,235 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1934 transitions. Word has length 10 [2020-10-05 23:08:03,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:03,235 INFO L479 AbstractCegarLoop]: Abstraction has 781 states and 1934 transitions. [2020-10-05 23:08:03,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:08:03,236 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1934 transitions. [2020-10-05 23:08:03,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:08:03,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:03,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:03,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-05 23:08:03,237 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:03,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2066968861, now seen corresponding path program 1 times [2020-10-05 23:08:03,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:03,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569043537] [2020-10-05 23:08:03,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:03,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569043537] [2020-10-05 23:08:03,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362501913] [2020-10-05 23:08:03,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:03,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-05 23:08:03,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:03,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:03,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-05 23:08:03,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857203864] [2020-10-05 23:08:03,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:08:03,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:03,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:08:03,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:08:03,394 INFO L87 Difference]: Start difference. First operand 781 states and 1934 transitions. Second operand 6 states. [2020-10-05 23:08:03,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:03,436 INFO L93 Difference]: Finished difference Result 779 states and 1929 transitions. [2020-10-05 23:08:03,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:08:03,437 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-05 23:08:03,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:03,442 INFO L225 Difference]: With dead ends: 779 [2020-10-05 23:08:03,442 INFO L226 Difference]: Without dead ends: 779 [2020-10-05 23:08:03,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:08:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2020-10-05 23:08:03,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 779. [2020-10-05 23:08:03,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 779 states. [2020-10-05 23:08:03,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1929 transitions. [2020-10-05 23:08:03,466 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1929 transitions. Word has length 17 [2020-10-05 23:08:03,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:03,466 INFO L479 AbstractCegarLoop]: Abstraction has 779 states and 1929 transitions. [2020-10-05 23:08:03,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:08:03,467 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1929 transitions. [2020-10-05 23:08:03,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:08:03,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:03,468 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:03,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:03,682 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:03,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:03,683 INFO L82 PathProgramCache]: Analyzing trace with hash 899828126, now seen corresponding path program 1 times [2020-10-05 23:08:03,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:03,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680739763] [2020-10-05 23:08:03,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:03,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680739763] [2020-10-05 23:08:03,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562691585] [2020-10-05 23:08:03,727 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2020-10-05 23:08:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:03,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-05 23:08:03,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:03,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:03,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-05 23:08:03,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393102917] [2020-10-05 23:08:03,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:08:03,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:03,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:08:03,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:08:03,838 INFO L87 Difference]: Start difference. First operand 779 states and 1929 transitions. Second operand 8 states. [2020-10-05 23:08:03,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:03,924 INFO L93 Difference]: Finished difference Result 775 states and 1917 transitions. [2020-10-05 23:08:03,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 23:08:03,925 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-05 23:08:03,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:03,931 INFO L225 Difference]: With dead ends: 775 [2020-10-05 23:08:03,931 INFO L226 Difference]: Without dead ends: 775 [2020-10-05 23:08:03,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:08:03,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2020-10-05 23:08:03,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2020-10-05 23:08:03,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-10-05 23:08:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1917 transitions. [2020-10-05 23:08:03,964 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1917 transitions. Word has length 23 [2020-10-05 23:08:03,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:03,964 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1917 transitions. [2020-10-05 23:08:03,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:08:03,964 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1917 transitions. [2020-10-05 23:08:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-05 23:08:03,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:03,968 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:04,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-05 23:08:04,182 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:04,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:04,182 INFO L82 PathProgramCache]: Analyzing trace with hash -683367746, now seen corresponding path program 1 times [2020-10-05 23:08:04,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:04,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278044067] [2020-10-05 23:08:04,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:04,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278044067] [2020-10-05 23:08:04,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878578683] [2020-10-05 23:08:04,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:08:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:04,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-05 23:08:04,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:04,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:04,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 23:08:04,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873853251] [2020-10-05 23:08:04,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:08:04,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:04,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:08:04,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:08:04,456 INFO L87 Difference]: Start difference. First operand 775 states and 1917 transitions. Second operand 10 states. [2020-10-05 23:08:04,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:04,534 INFO L93 Difference]: Finished difference Result 767 states and 1889 transitions. [2020-10-05 23:08:04,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-05 23:08:04,535 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-05 23:08:04,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:04,542 INFO L225 Difference]: With dead ends: 767 [2020-10-05 23:08:04,542 INFO L226 Difference]: Without dead ends: 767 [2020-10-05 23:08:04,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:08:04,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2020-10-05 23:08:04,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2020-10-05 23:08:04,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2020-10-05 23:08:04,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1889 transitions. [2020-10-05 23:08:04,567 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1889 transitions. Word has length 29 [2020-10-05 23:08:04,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:04,568 INFO L479 AbstractCegarLoop]: Abstraction has 767 states and 1889 transitions. [2020-10-05 23:08:04,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:08:04,568 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1889 transitions. [2020-10-05 23:08:04,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-05 23:08:04,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:04,572 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:04,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-05 23:08:04,784 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:04,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:04,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1728417408, now seen corresponding path program 1 times [2020-10-05 23:08:04,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:04,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693701198] [2020-10-05 23:08:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:08:04,802 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:08:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:08:04,820 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:08:04,829 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-05 23:08:04,829 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-05 23:08:04,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-05 23:08:04,830 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-05 23:08:04,830 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-05 23:08:04,830 WARN L363 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-05 23:08:04,831 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-10-05 23:08:04,838 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,838 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,839 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,839 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,839 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,839 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,839 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,839 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,839 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,840 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,840 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,840 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,840 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,840 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,840 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,841 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,841 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,841 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,841 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,841 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,841 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,841 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,842 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,842 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,842 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,842 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,842 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,842 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,842 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,843 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,843 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,843 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,843 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,843 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,845 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,845 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,845 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,845 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,846 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,846 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,846 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,846 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,847 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,847 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,847 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,848 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,848 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,849 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,849 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,849 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:04,852 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-05 23:08:04,853 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:08:04,853 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:08:04,853 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:08:04,853 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-05 23:08:04,853 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:08:04,853 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:08:04,853 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:08:04,854 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:08:04,855 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 108 transitions, 276 flow [2020-10-05 23:08:04,855 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 108 transitions, 276 flow [2020-10-05 23:08:05,037 INFO L129 PetriNetUnfolder]: 190/1266 cut-off events. [2020-10-05 23:08:05,037 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-05 23:08:05,041 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 1266 events. 190/1266 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6695 event pairs, 23 based on Foata normal form. 0/1060 useless extension candidates. Maximal degree in co-relation 716. Up to 80 conditions per place. [2020-10-05 23:08:05,070 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 108 transitions, 276 flow [2020-10-05 23:08:05,265 INFO L129 PetriNetUnfolder]: 190/1266 cut-off events. [2020-10-05 23:08:05,265 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-05 23:08:05,269 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 1266 events. 190/1266 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6695 event pairs, 23 based on Foata normal form. 0/1060 useless extension candidates. Maximal degree in co-relation 716. Up to 80 conditions per place. [2020-10-05 23:08:05,292 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2480 [2020-10-05 23:08:05,292 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:08:06,807 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-05 23:08:07,128 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2020-10-05 23:08:07,223 INFO L206 etLargeBlockEncoding]: Checked pairs total: 1953 [2020-10-05 23:08:07,223 INFO L214 etLargeBlockEncoding]: Total number of compositions: 87 [2020-10-05 23:08:07,223 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 31 transitions, 122 flow [2020-10-05 23:08:07,324 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 2289 states. [2020-10-05 23:08:07,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states. [2020-10-05 23:08:07,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-05 23:08:07,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:07,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-05 23:08:07,326 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:07,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:07,326 INFO L82 PathProgramCache]: Analyzing trace with hash 33997000, now seen corresponding path program 1 times [2020-10-05 23:08:07,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:07,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670356581] [2020-10-05 23:08:07,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:08:07,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670356581] [2020-10-05 23:08:07,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:08:07,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:08:07,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226297733] [2020-10-05 23:08:07,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:08:07,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:07,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:08:07,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:08:07,347 INFO L87 Difference]: Start difference. First operand 2289 states. Second operand 3 states. [2020-10-05 23:08:07,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:07,407 INFO L93 Difference]: Finished difference Result 2289 states and 6658 transitions. [2020-10-05 23:08:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:08:07,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-05 23:08:07,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:07,421 INFO L225 Difference]: With dead ends: 2289 [2020-10-05 23:08:07,422 INFO L226 Difference]: Without dead ends: 2044 [2020-10-05 23:08:07,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:08:07,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2020-10-05 23:08:07,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 2044. [2020-10-05 23:08:07,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2044 states. [2020-10-05 23:08:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 6008 transitions. [2020-10-05 23:08:07,507 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 6008 transitions. Word has length 4 [2020-10-05 23:08:07,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:07,507 INFO L479 AbstractCegarLoop]: Abstraction has 2044 states and 6008 transitions. [2020-10-05 23:08:07,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:08:07,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 6008 transitions. [2020-10-05 23:08:07,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:08:07,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:07,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:07,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-05 23:08:07,508 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:07,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:07,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1850212091, now seen corresponding path program 1 times [2020-10-05 23:08:07,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:07,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314699272] [2020-10-05 23:08:07,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:08:07,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314699272] [2020-10-05 23:08:07,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:08:07,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:08:07,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719999279] [2020-10-05 23:08:07,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:08:07,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:07,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:08:07,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:08:07,544 INFO L87 Difference]: Start difference. First operand 2044 states and 6008 transitions. Second operand 4 states. [2020-10-05 23:08:07,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:07,611 INFO L93 Difference]: Finished difference Result 2379 states and 6766 transitions. [2020-10-05 23:08:07,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:08:07,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-05 23:08:07,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:07,634 INFO L225 Difference]: With dead ends: 2379 [2020-10-05 23:08:07,634 INFO L226 Difference]: Without dead ends: 2379 [2020-10-05 23:08:07,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:08:07,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2020-10-05 23:08:07,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 2221. [2020-10-05 23:08:07,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2221 states. [2020-10-05 23:08:07,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 6367 transitions. [2020-10-05 23:08:07,730 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 6367 transitions. Word has length 10 [2020-10-05 23:08:07,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:07,731 INFO L479 AbstractCegarLoop]: Abstraction has 2221 states and 6367 transitions. [2020-10-05 23:08:07,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:08:07,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 6367 transitions. [2020-10-05 23:08:07,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:08:07,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:07,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:07,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-05 23:08:07,732 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:07,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:07,732 INFO L82 PathProgramCache]: Analyzing trace with hash -50306259, now seen corresponding path program 1 times [2020-10-05 23:08:07,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:07,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962803227] [2020-10-05 23:08:07,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:07,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962803227] [2020-10-05 23:08:07,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113934194] [2020-10-05 23:08:07,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:08:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:07,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-05 23:08:07,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:07,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:07,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-05 23:08:07,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005171219] [2020-10-05 23:08:07,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:08:07,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:07,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:08:07,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:08:07,872 INFO L87 Difference]: Start difference. First operand 2221 states and 6367 transitions. Second operand 6 states. [2020-10-05 23:08:07,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:07,923 INFO L93 Difference]: Finished difference Result 2219 states and 6362 transitions. [2020-10-05 23:08:07,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:08:07,924 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-05 23:08:07,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:07,941 INFO L225 Difference]: With dead ends: 2219 [2020-10-05 23:08:07,941 INFO L226 Difference]: Without dead ends: 2219 [2020-10-05 23:08:07,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:08:07,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2020-10-05 23:08:08,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 2219. [2020-10-05 23:08:08,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2219 states. [2020-10-05 23:08:08,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 6362 transitions. [2020-10-05 23:08:08,016 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 6362 transitions. Word has length 17 [2020-10-05 23:08:08,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:08,016 INFO L479 AbstractCegarLoop]: Abstraction has 2219 states and 6362 transitions. [2020-10-05 23:08:08,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:08:08,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 6362 transitions. [2020-10-05 23:08:08,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:08:08,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:08,017 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:08,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:08,230 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:08,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:08,231 INFO L82 PathProgramCache]: Analyzing trace with hash -811477057, now seen corresponding path program 1 times [2020-10-05 23:08:08,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:08,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979181915] [2020-10-05 23:08:08,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:08,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979181915] [2020-10-05 23:08:08,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814913021] [2020-10-05 23:08:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:08:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:08,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-05 23:08:08,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:08,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:08,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:08,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-05 23:08:08,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914652624] [2020-10-05 23:08:08,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:08:08,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:08,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:08:08,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:08:08,421 INFO L87 Difference]: Start difference. First operand 2219 states and 6362 transitions. Second operand 8 states. [2020-10-05 23:08:08,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:08,480 INFO L93 Difference]: Finished difference Result 2215 states and 6350 transitions. [2020-10-05 23:08:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 23:08:08,481 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-05 23:08:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:08,497 INFO L225 Difference]: With dead ends: 2215 [2020-10-05 23:08:08,498 INFO L226 Difference]: Without dead ends: 2215 [2020-10-05 23:08:08,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:08:08,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2020-10-05 23:08:08,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2215. [2020-10-05 23:08:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2215 states. [2020-10-05 23:08:08,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 6350 transitions. [2020-10-05 23:08:08,576 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 6350 transitions. Word has length 23 [2020-10-05 23:08:08,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:08,576 INFO L479 AbstractCegarLoop]: Abstraction has 2215 states and 6350 transitions. [2020-10-05 23:08:08,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:08:08,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 6350 transitions. [2020-10-05 23:08:08,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-05 23:08:08,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:08,578 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:08,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-05 23:08:08,791 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:08,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:08,792 INFO L82 PathProgramCache]: Analyzing trace with hash -346309584, now seen corresponding path program 1 times [2020-10-05 23:08:08,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:08,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889757177] [2020-10-05 23:08:08,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:08,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889757177] [2020-10-05 23:08:08,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324523737] [2020-10-05 23:08:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:08:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:08,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-05 23:08:08,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:08,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:08,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 23:08:08,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267205136] [2020-10-05 23:08:08,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:08:08,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:08,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:08:08,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:08:08,959 INFO L87 Difference]: Start difference. First operand 2215 states and 6350 transitions. Second operand 10 states. [2020-10-05 23:08:09,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:09,062 INFO L93 Difference]: Finished difference Result 2207 states and 6322 transitions. [2020-10-05 23:08:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-05 23:08:09,062 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-05 23:08:09,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:09,078 INFO L225 Difference]: With dead ends: 2207 [2020-10-05 23:08:09,078 INFO L226 Difference]: Without dead ends: 2207 [2020-10-05 23:08:09,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:08:09,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2020-10-05 23:08:09,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2207. [2020-10-05 23:08:09,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2207 states. [2020-10-05 23:08:09,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 6322 transitions. [2020-10-05 23:08:09,146 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 6322 transitions. Word has length 29 [2020-10-05 23:08:09,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:09,147 INFO L479 AbstractCegarLoop]: Abstraction has 2207 states and 6322 transitions. [2020-10-05 23:08:09,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:08:09,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 6322 transitions. [2020-10-05 23:08:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:08:09,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:09,150 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:09,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:09,363 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:09,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:09,364 INFO L82 PathProgramCache]: Analyzing trace with hash 107769152, now seen corresponding path program 1 times [2020-10-05 23:08:09,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:09,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806268602] [2020-10-05 23:08:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:09,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806268602] [2020-10-05 23:08:09,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646600716] [2020-10-05 23:08:09,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:09,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 23:08:09,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:09,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:09,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 23:08:09,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638954406] [2020-10-05 23:08:09,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:08:09,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:09,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:08:09,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:08:09,607 INFO L87 Difference]: Start difference. First operand 2207 states and 6322 transitions. Second operand 12 states. [2020-10-05 23:08:09,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:09,677 INFO L93 Difference]: Finished difference Result 2191 states and 6258 transitions. [2020-10-05 23:08:09,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 23:08:09,678 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-05 23:08:09,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:09,706 INFO L225 Difference]: With dead ends: 2191 [2020-10-05 23:08:09,706 INFO L226 Difference]: Without dead ends: 2191 [2020-10-05 23:08:09,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:08:09,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2020-10-05 23:08:09,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 2191. [2020-10-05 23:08:09,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2191 states. [2020-10-05 23:08:09,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 6258 transitions. [2020-10-05 23:08:09,785 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 6258 transitions. Word has length 35 [2020-10-05 23:08:09,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:09,787 INFO L479 AbstractCegarLoop]: Abstraction has 2191 states and 6258 transitions. [2020-10-05 23:08:09,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:08:09,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 6258 transitions. [2020-10-05 23:08:09,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:08:09,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:09,789 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:10,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:10,003 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:10,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:10,004 INFO L82 PathProgramCache]: Analyzing trace with hash -793168517, now seen corresponding path program 1 times [2020-10-05 23:08:10,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:10,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543998456] [2020-10-05 23:08:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:08:10,047 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:08:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:08:10,074 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:08:10,099 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-05 23:08:10,099 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-05 23:08:10,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-05 23:08:10,099 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-05 23:08:10,099 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-05 23:08:10,102 WARN L363 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-05 23:08:10,103 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2020-10-05 23:08:10,114 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,114 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,114 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,114 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,115 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,115 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,115 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,115 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,115 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,115 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,115 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,116 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,116 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,116 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,116 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,116 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,116 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,116 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,117 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,117 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,117 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,117 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,117 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,117 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,117 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,118 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,118 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,118 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,118 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,118 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,118 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,119 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,119 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,119 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,119 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,119 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,119 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,120 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,120 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,120 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,121 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,121 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,121 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,121 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,124 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,124 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,124 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,125 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,128 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,128 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,128 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,129 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,131 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,131 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,131 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,131 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,132 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,132 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,132 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,132 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:10,137 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-05 23:08:10,137 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:08:10,137 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:08:10,137 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:08:10,137 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-05 23:08:10,137 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:08:10,138 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:08:10,138 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:08:10,138 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:08:10,139 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 114 transitions, 306 flow [2020-10-05 23:08:10,140 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 114 places, 114 transitions, 306 flow [2020-10-05 23:08:10,473 INFO L129 PetriNetUnfolder]: 400/2453 cut-off events. [2020-10-05 23:08:10,473 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-05 23:08:10,485 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 2453 events. 400/2453 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 16405 event pairs, 72 based on Foata normal form. 0/2053 useless extension candidates. Maximal degree in co-relation 1365. Up to 192 conditions per place. [2020-10-05 23:08:10,521 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 114 places, 114 transitions, 306 flow [2020-10-05 23:08:10,887 INFO L129 PetriNetUnfolder]: 400/2453 cut-off events. [2020-10-05 23:08:10,888 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-05 23:08:10,897 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 2453 events. 400/2453 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 16405 event pairs, 72 based on Foata normal form. 0/2053 useless extension candidates. Maximal degree in co-relation 1365. Up to 192 conditions per place. [2020-10-05 23:08:10,939 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 3144 [2020-10-05 23:08:10,940 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:08:12,528 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-05 23:08:12,812 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 92 [2020-10-05 23:08:12,918 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-05 23:08:12,921 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2432 [2020-10-05 23:08:12,921 INFO L214 etLargeBlockEncoding]: Total number of compositions: 90 [2020-10-05 23:08:12,922 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 34 transitions, 146 flow [2020-10-05 23:08:13,286 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 6529 states. [2020-10-05 23:08:13,287 INFO L276 IsEmpty]: Start isEmpty. Operand 6529 states. [2020-10-05 23:08:13,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-05 23:08:13,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:13,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-05 23:08:13,287 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:13,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:13,287 INFO L82 PathProgramCache]: Analyzing trace with hash 40649002, now seen corresponding path program 1 times [2020-10-05 23:08:13,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:13,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257584857] [2020-10-05 23:08:13,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:08:13,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257584857] [2020-10-05 23:08:13,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:08:13,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:08:13,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915163787] [2020-10-05 23:08:13,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:08:13,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:13,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:08:13,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:08:13,308 INFO L87 Difference]: Start difference. First operand 6529 states. Second operand 3 states. [2020-10-05 23:08:13,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:13,365 INFO L93 Difference]: Finished difference Result 6529 states and 21447 transitions. [2020-10-05 23:08:13,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:08:13,366 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-05 23:08:13,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:13,394 INFO L225 Difference]: With dead ends: 6529 [2020-10-05 23:08:13,394 INFO L226 Difference]: Without dead ends: 5798 [2020-10-05 23:08:13,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:08:13,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2020-10-05 23:08:13,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 5798. [2020-10-05 23:08:13,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5798 states. [2020-10-05 23:08:13,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5798 states to 5798 states and 19258 transitions. [2020-10-05 23:08:13,602 INFO L78 Accepts]: Start accepts. Automaton has 5798 states and 19258 transitions. Word has length 4 [2020-10-05 23:08:13,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:13,602 INFO L479 AbstractCegarLoop]: Abstraction has 5798 states and 19258 transitions. [2020-10-05 23:08:13,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:08:13,602 INFO L276 IsEmpty]: Start isEmpty. Operand 5798 states and 19258 transitions. [2020-10-05 23:08:13,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:08:13,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:13,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:13,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-05 23:08:13,603 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:13,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:13,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1545227554, now seen corresponding path program 1 times [2020-10-05 23:08:13,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:13,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486894085] [2020-10-05 23:08:13,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:08:13,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486894085] [2020-10-05 23:08:13,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:08:13,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:08:13,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354064839] [2020-10-05 23:08:13,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:08:13,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:13,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:08:13,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:08:13,640 INFO L87 Difference]: Start difference. First operand 5798 states and 19258 transitions. Second operand 4 states. [2020-10-05 23:08:13,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:13,812 INFO L93 Difference]: Finished difference Result 6779 states and 21955 transitions. [2020-10-05 23:08:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:08:13,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-05 23:08:13,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:13,835 INFO L225 Difference]: With dead ends: 6779 [2020-10-05 23:08:13,835 INFO L226 Difference]: Without dead ends: 6779 [2020-10-05 23:08:13,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:08:13,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6779 states. [2020-10-05 23:08:14,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6779 to 6397. [2020-10-05 23:08:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6397 states. [2020-10-05 23:08:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6397 states to 6397 states and 20804 transitions. [2020-10-05 23:08:14,051 INFO L78 Accepts]: Start accepts. Automaton has 6397 states and 20804 transitions. Word has length 10 [2020-10-05 23:08:14,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:14,051 INFO L479 AbstractCegarLoop]: Abstraction has 6397 states and 20804 transitions. [2020-10-05 23:08:14,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:08:14,052 INFO L276 IsEmpty]: Start isEmpty. Operand 6397 states and 20804 transitions. [2020-10-05 23:08:14,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:08:14,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:14,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:14,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-05 23:08:14,052 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:14,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:14,053 INFO L82 PathProgramCache]: Analyzing trace with hash 2077640958, now seen corresponding path program 1 times [2020-10-05 23:08:14,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:14,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181721931] [2020-10-05 23:08:14,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:14,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181721931] [2020-10-05 23:08:14,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225667606] [2020-10-05 23:08:14,083 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2020-10-05 23:08:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:14,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-05 23:08:14,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:14,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:14,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-05 23:08:14,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830855279] [2020-10-05 23:08:14,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:08:14,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:14,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:08:14,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:08:14,184 INFO L87 Difference]: Start difference. First operand 6397 states and 20804 transitions. Second operand 6 states. [2020-10-05 23:08:14,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:14,259 INFO L93 Difference]: Finished difference Result 6395 states and 20799 transitions. [2020-10-05 23:08:14,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:08:14,260 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-05 23:08:14,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:14,282 INFO L225 Difference]: With dead ends: 6395 [2020-10-05 23:08:14,282 INFO L226 Difference]: Without dead ends: 6395 [2020-10-05 23:08:14,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:08:14,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6395 states. [2020-10-05 23:08:14,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6395 to 6395. [2020-10-05 23:08:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6395 states. [2020-10-05 23:08:14,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6395 states to 6395 states and 20799 transitions. [2020-10-05 23:08:14,452 INFO L78 Accepts]: Start accepts. Automaton has 6395 states and 20799 transitions. Word has length 17 [2020-10-05 23:08:14,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:14,452 INFO L479 AbstractCegarLoop]: Abstraction has 6395 states and 20799 transitions. [2020-10-05 23:08:14,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:08:14,453 INFO L276 IsEmpty]: Start isEmpty. Operand 6395 states and 20799 transitions. [2020-10-05 23:08:14,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:08:14,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:14,453 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:14,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-05 23:08:14,668 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:14,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:14,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1893591663, now seen corresponding path program 1 times [2020-10-05 23:08:14,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:14,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313430335] [2020-10-05 23:08:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:14,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313430335] [2020-10-05 23:08:14,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164489624] [2020-10-05 23:08:14,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:08:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:14,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-05 23:08:14,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:14,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:14,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-05 23:08:14,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988024838] [2020-10-05 23:08:14,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:08:14,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:14,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:08:14,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:08:14,848 INFO L87 Difference]: Start difference. First operand 6395 states and 20799 transitions. Second operand 8 states. [2020-10-05 23:08:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:14,917 INFO L93 Difference]: Finished difference Result 6391 states and 20787 transitions. [2020-10-05 23:08:14,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 23:08:14,917 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-05 23:08:14,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:14,940 INFO L225 Difference]: With dead ends: 6391 [2020-10-05 23:08:14,941 INFO L226 Difference]: Without dead ends: 6391 [2020-10-05 23:08:14,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:08:14,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6391 states. [2020-10-05 23:08:15,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6391 to 6391. [2020-10-05 23:08:15,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6391 states. [2020-10-05 23:08:15,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6391 states to 6391 states and 20787 transitions. [2020-10-05 23:08:15,209 INFO L78 Accepts]: Start accepts. Automaton has 6391 states and 20787 transitions. Word has length 23 [2020-10-05 23:08:15,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:15,209 INFO L479 AbstractCegarLoop]: Abstraction has 6391 states and 20787 transitions. [2020-10-05 23:08:15,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:08:15,209 INFO L276 IsEmpty]: Start isEmpty. Operand 6391 states and 20787 transitions. [2020-10-05 23:08:15,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-05 23:08:15,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:15,210 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:15,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-05 23:08:15,424 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:15,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:15,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1656058557, now seen corresponding path program 1 times [2020-10-05 23:08:15,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:15,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601821976] [2020-10-05 23:08:15,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:15,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601821976] [2020-10-05 23:08:15,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859014926] [2020-10-05 23:08:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:08:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:15,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-05 23:08:15,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:15,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:15,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 23:08:15,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499979020] [2020-10-05 23:08:15,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:08:15,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:15,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:08:15,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:08:15,615 INFO L87 Difference]: Start difference. First operand 6391 states and 20787 transitions. Second operand 10 states. [2020-10-05 23:08:15,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:15,693 INFO L93 Difference]: Finished difference Result 6383 states and 20759 transitions. [2020-10-05 23:08:15,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-05 23:08:15,693 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-05 23:08:15,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:15,716 INFO L225 Difference]: With dead ends: 6383 [2020-10-05 23:08:15,716 INFO L226 Difference]: Without dead ends: 6383 [2020-10-05 23:08:15,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:08:15,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6383 states. [2020-10-05 23:08:15,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6383 to 6383. [2020-10-05 23:08:15,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6383 states. [2020-10-05 23:08:15,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6383 states to 6383 states and 20759 transitions. [2020-10-05 23:08:15,882 INFO L78 Accepts]: Start accepts. Automaton has 6383 states and 20759 transitions. Word has length 29 [2020-10-05 23:08:15,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:15,882 INFO L479 AbstractCegarLoop]: Abstraction has 6383 states and 20759 transitions. [2020-10-05 23:08:15,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:08:15,882 INFO L276 IsEmpty]: Start isEmpty. Operand 6383 states and 20759 transitions. [2020-10-05 23:08:15,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:08:15,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:15,884 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:16,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:16,085 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:16,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:16,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1120181460, now seen corresponding path program 1 times [2020-10-05 23:08:16,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:16,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86764402] [2020-10-05 23:08:16,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:16,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86764402] [2020-10-05 23:08:16,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297790016] [2020-10-05 23:08:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:08:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:16,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 23:08:16,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:16,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:16,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 23:08:16,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018484959] [2020-10-05 23:08:16,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:08:16,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:16,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:08:16,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:08:16,295 INFO L87 Difference]: Start difference. First operand 6383 states and 20759 transitions. Second operand 12 states. [2020-10-05 23:08:16,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:16,374 INFO L93 Difference]: Finished difference Result 6367 states and 20695 transitions. [2020-10-05 23:08:16,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 23:08:16,375 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-05 23:08:16,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:16,399 INFO L225 Difference]: With dead ends: 6367 [2020-10-05 23:08:16,399 INFO L226 Difference]: Without dead ends: 6367 [2020-10-05 23:08:16,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:08:16,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6367 states. [2020-10-05 23:08:16,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6367 to 6367. [2020-10-05 23:08:16,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6367 states. [2020-10-05 23:08:17,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 20695 transitions. [2020-10-05 23:08:17,148 INFO L78 Accepts]: Start accepts. Automaton has 6367 states and 20695 transitions. Word has length 35 [2020-10-05 23:08:17,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:17,149 INFO L479 AbstractCegarLoop]: Abstraction has 6367 states and 20695 transitions. [2020-10-05 23:08:17,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:08:17,149 INFO L276 IsEmpty]: Start isEmpty. Operand 6367 states and 20695 transitions. [2020-10-05 23:08:17,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-05 23:08:17,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:17,156 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:17,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:17,370 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:17,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:17,370 INFO L82 PathProgramCache]: Analyzing trace with hash -531586812, now seen corresponding path program 1 times [2020-10-05 23:08:17,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:17,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628785846] [2020-10-05 23:08:17,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:17,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628785846] [2020-10-05 23:08:17,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187762773] [2020-10-05 23:08:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:08:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:17,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 23:08:17,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:17,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:17,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 23:08:17,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798659148] [2020-10-05 23:08:17,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:08:17,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:17,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:08:17,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:08:17,608 INFO L87 Difference]: Start difference. First operand 6367 states and 20695 transitions. Second operand 14 states. [2020-10-05 23:08:17,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:17,707 INFO L93 Difference]: Finished difference Result 6335 states and 20551 transitions. [2020-10-05 23:08:17,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 23:08:17,707 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-05 23:08:17,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:17,723 INFO L225 Difference]: With dead ends: 6335 [2020-10-05 23:08:17,724 INFO L226 Difference]: Without dead ends: 6335 [2020-10-05 23:08:17,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:08:17,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6335 states. [2020-10-05 23:08:17,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6335 to 6335. [2020-10-05 23:08:17,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6335 states. [2020-10-05 23:08:17,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6335 states to 6335 states and 20551 transitions. [2020-10-05 23:08:17,917 INFO L78 Accepts]: Start accepts. Automaton has 6335 states and 20551 transitions. Word has length 41 [2020-10-05 23:08:17,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:17,918 INFO L479 AbstractCegarLoop]: Abstraction has 6335 states and 20551 transitions. [2020-10-05 23:08:17,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:08:17,918 INFO L276 IsEmpty]: Start isEmpty. Operand 6335 states and 20551 transitions. [2020-10-05 23:08:17,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-05 23:08:17,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:17,921 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:18,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-05 23:08:18,136 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:18,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:18,136 INFO L82 PathProgramCache]: Analyzing trace with hash -431266190, now seen corresponding path program 1 times [2020-10-05 23:08:18,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:18,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206199480] [2020-10-05 23:08:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:18,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:08:18,159 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:08:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:08:18,185 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:08:18,196 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-05 23:08:18,196 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-05 23:08:18,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-05 23:08:18,196 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-05 23:08:18,197 WARN L363 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-05 23:08:18,197 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2020-10-05 23:08:18,207 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,207 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,207 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,207 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,207 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,208 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,208 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,208 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,208 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,208 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,208 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,209 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,209 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,209 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,209 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,209 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,209 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,209 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,210 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,210 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,210 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,210 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,210 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,210 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,211 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,211 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,211 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,211 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,211 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,211 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,212 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,212 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,212 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,212 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,212 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,212 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,213 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,213 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,213 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,213 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,213 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,213 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,214 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,214 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,214 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,214 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,216 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,216 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,216 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,216 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,218 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,218 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,218 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,218 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,220 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,220 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,220 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,220 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,222 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,222 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,222 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,222 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,224 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,224 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,224 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,224 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,225 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,226 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,226 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,226 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:18,232 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-05 23:08:18,233 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:08:18,233 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:08:18,233 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:08:18,233 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-05 23:08:18,233 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:08:18,233 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:08:18,233 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:08:18,233 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:08:18,234 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 120 transitions, 338 flow [2020-10-05 23:08:18,235 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 121 places, 120 transitions, 338 flow [2020-10-05 23:08:19,223 INFO L129 PetriNetUnfolder]: 850/4840 cut-off events. [2020-10-05 23:08:19,223 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-05 23:08:19,242 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5338 conditions, 4840 events. 850/4840 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 39298 event pairs, 201 based on Foata normal form. 0/4054 useless extension candidates. Maximal degree in co-relation 2671. Up to 448 conditions per place. [2020-10-05 23:08:19,350 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 121 places, 120 transitions, 338 flow [2020-10-05 23:08:20,219 INFO L129 PetriNetUnfolder]: 850/4840 cut-off events. [2020-10-05 23:08:20,219 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-05 23:08:20,242 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5338 conditions, 4840 events. 850/4840 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 39298 event pairs, 201 based on Foata normal form. 0/4054 useless extension candidates. Maximal degree in co-relation 2671. Up to 448 conditions per place. [2020-10-05 23:08:20,326 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 3864 [2020-10-05 23:08:20,326 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:08:22,028 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-05 23:08:22,423 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-10-05 23:08:22,530 INFO L206 etLargeBlockEncoding]: Checked pairs total: 3124 [2020-10-05 23:08:22,530 INFO L214 etLargeBlockEncoding]: Total number of compositions: 95 [2020-10-05 23:08:22,530 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 37 transitions, 172 flow [2020-10-05 23:08:23,646 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 18897 states. [2020-10-05 23:08:23,646 INFO L276 IsEmpty]: Start isEmpty. Operand 18897 states. [2020-10-05 23:08:23,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-05 23:08:23,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:23,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-05 23:08:23,646 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:23,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:23,647 INFO L82 PathProgramCache]: Analyzing trace with hash 47630986, now seen corresponding path program 1 times [2020-10-05 23:08:23,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:23,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310652139] [2020-10-05 23:08:23,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:08:23,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310652139] [2020-10-05 23:08:23,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:08:23,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:08:23,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350593525] [2020-10-05 23:08:23,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:08:23,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:23,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:08:23,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:08:23,662 INFO L87 Difference]: Start difference. First operand 18897 states. Second operand 3 states. [2020-10-05 23:08:23,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:23,795 INFO L93 Difference]: Finished difference Result 18897 states and 69116 transitions. [2020-10-05 23:08:23,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:08:23,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-05 23:08:23,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:23,838 INFO L225 Difference]: With dead ends: 18897 [2020-10-05 23:08:23,839 INFO L226 Difference]: Without dead ends: 16708 [2020-10-05 23:08:23,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:08:24,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16708 states. [2020-10-05 23:08:24,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16708 to 16708. [2020-10-05 23:08:24,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16708 states. [2020-10-05 23:08:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16708 states to 16708 states and 61824 transitions. [2020-10-05 23:08:24,378 INFO L78 Accepts]: Start accepts. Automaton has 16708 states and 61824 transitions. Word has length 4 [2020-10-05 23:08:24,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:24,378 INFO L479 AbstractCegarLoop]: Abstraction has 16708 states and 61824 transitions. [2020-10-05 23:08:24,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:08:24,378 INFO L276 IsEmpty]: Start isEmpty. Operand 16708 states and 61824 transitions. [2020-10-05 23:08:24,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:08:24,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:24,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:24,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-05 23:08:24,379 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:24,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:24,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1252214789, now seen corresponding path program 1 times [2020-10-05 23:08:24,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:24,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684856677] [2020-10-05 23:08:24,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:08:24,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684856677] [2020-10-05 23:08:24,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:08:24,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:08:24,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546601038] [2020-10-05 23:08:24,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:08:24,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:24,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:08:24,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:08:24,411 INFO L87 Difference]: Start difference. First operand 16708 states and 61824 transitions. Second operand 4 states. [2020-10-05 23:08:24,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:25,592 INFO L93 Difference]: Finished difference Result 19531 states and 70840 transitions. [2020-10-05 23:08:25,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:08:25,593 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-05 23:08:25,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:25,648 INFO L225 Difference]: With dead ends: 19531 [2020-10-05 23:08:25,648 INFO L226 Difference]: Without dead ends: 19531 [2020-10-05 23:08:25,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:08:25,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19531 states. [2020-10-05 23:08:26,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19531 to 18637. [2020-10-05 23:08:26,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18637 states. [2020-10-05 23:08:26,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18637 states to 18637 states and 67705 transitions. [2020-10-05 23:08:26,291 INFO L78 Accepts]: Start accepts. Automaton has 18637 states and 67705 transitions. Word has length 10 [2020-10-05 23:08:26,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:26,291 INFO L479 AbstractCegarLoop]: Abstraction has 18637 states and 67705 transitions. [2020-10-05 23:08:26,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:08:26,292 INFO L276 IsEmpty]: Start isEmpty. Operand 18637 states and 67705 transitions. [2020-10-05 23:08:26,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:08:26,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:26,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:26,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-05 23:08:26,293 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:26,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1432879296, now seen corresponding path program 1 times [2020-10-05 23:08:26,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:26,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526550399] [2020-10-05 23:08:26,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:26,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:26,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526550399] [2020-10-05 23:08:26,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649468521] [2020-10-05 23:08:26,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:26,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-05 23:08:26,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:26,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:26,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-05 23:08:26,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770957295] [2020-10-05 23:08:26,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:08:26,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:26,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:08:26,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:08:26,429 INFO L87 Difference]: Start difference. First operand 18637 states and 67705 transitions. Second operand 6 states. [2020-10-05 23:08:26,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:26,546 INFO L93 Difference]: Finished difference Result 18635 states and 67700 transitions. [2020-10-05 23:08:26,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:08:26,547 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-05 23:08:26,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:26,583 INFO L225 Difference]: With dead ends: 18635 [2020-10-05 23:08:26,583 INFO L226 Difference]: Without dead ends: 18635 [2020-10-05 23:08:26,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:08:26,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18635 states. [2020-10-05 23:08:27,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18635 to 18635. [2020-10-05 23:08:27,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18635 states. [2020-10-05 23:08:27,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18635 states to 18635 states and 67700 transitions. [2020-10-05 23:08:27,283 INFO L78 Accepts]: Start accepts. Automaton has 18635 states and 67700 transitions. Word has length 17 [2020-10-05 23:08:27,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:27,283 INFO L479 AbstractCegarLoop]: Abstraction has 18635 states and 67700 transitions. [2020-10-05 23:08:27,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:08:27,283 INFO L276 IsEmpty]: Start isEmpty. Operand 18635 states and 67700 transitions. [2020-10-05 23:08:27,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:08:27,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:27,284 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:27,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:27,499 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:27,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:27,499 INFO L82 PathProgramCache]: Analyzing trace with hash -619616742, now seen corresponding path program 1 times [2020-10-05 23:08:27,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:27,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624382250] [2020-10-05 23:08:27,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:27,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624382250] [2020-10-05 23:08:27,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210975390] [2020-10-05 23:08:27,554 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2020-10-05 23:08:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:27,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-05 23:08:27,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:27,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:27,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:27,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-05 23:08:27,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378605963] [2020-10-05 23:08:27,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:08:27,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:27,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:08:27,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:08:27,664 INFO L87 Difference]: Start difference. First operand 18635 states and 67700 transitions. Second operand 8 states. [2020-10-05 23:08:27,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:27,808 INFO L93 Difference]: Finished difference Result 18631 states and 67688 transitions. [2020-10-05 23:08:27,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 23:08:27,809 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-05 23:08:27,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:27,872 INFO L225 Difference]: With dead ends: 18631 [2020-10-05 23:08:27,872 INFO L226 Difference]: Without dead ends: 18631 [2020-10-05 23:08:27,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:08:28,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18631 states. [2020-10-05 23:08:28,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18631 to 18631. [2020-10-05 23:08:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18631 states. [2020-10-05 23:08:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18631 states to 18631 states and 67688 transitions. [2020-10-05 23:08:28,483 INFO L78 Accepts]: Start accepts. Automaton has 18631 states and 67688 transitions. Word has length 23 [2020-10-05 23:08:28,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:28,483 INFO L479 AbstractCegarLoop]: Abstraction has 18631 states and 67688 transitions. [2020-10-05 23:08:28,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:08:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 18631 states and 67688 transitions. [2020-10-05 23:08:28,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-05 23:08:28,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:28,484 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:28,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-05 23:08:28,685 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:28,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:28,686 INFO L82 PathProgramCache]: Analyzing trace with hash 872252755, now seen corresponding path program 1 times [2020-10-05 23:08:28,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:28,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377745839] [2020-10-05 23:08:28,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:28,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377745839] [2020-10-05 23:08:28,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870366593] [2020-10-05 23:08:28,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:08:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:28,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-05 23:08:28,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:28,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:28,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 23:08:28,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551094512] [2020-10-05 23:08:28,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:08:28,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:28,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:08:28,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:08:28,848 INFO L87 Difference]: Start difference. First operand 18631 states and 67688 transitions. Second operand 10 states. [2020-10-05 23:08:29,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:29,135 INFO L93 Difference]: Finished difference Result 18623 states and 67660 transitions. [2020-10-05 23:08:29,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-05 23:08:29,136 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-05 23:08:29,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:29,171 INFO L225 Difference]: With dead ends: 18623 [2020-10-05 23:08:29,172 INFO L226 Difference]: Without dead ends: 18623 [2020-10-05 23:08:29,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:08:29,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18623 states. [2020-10-05 23:08:29,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18623 to 18623. [2020-10-05 23:08:29,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18623 states. [2020-10-05 23:08:29,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18623 states to 18623 states and 67660 transitions. [2020-10-05 23:08:29,620 INFO L78 Accepts]: Start accepts. Automaton has 18623 states and 67660 transitions. Word has length 29 [2020-10-05 23:08:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:29,621 INFO L479 AbstractCegarLoop]: Abstraction has 18623 states and 67660 transitions. [2020-10-05 23:08:29,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:08:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 18623 states and 67660 transitions. [2020-10-05 23:08:29,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:08:29,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:29,623 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:29,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-05 23:08:29,837 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:29,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:29,837 INFO L82 PathProgramCache]: Analyzing trace with hash -603243733, now seen corresponding path program 1 times [2020-10-05 23:08:29,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:29,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029536039] [2020-10-05 23:08:29,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:29,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029536039] [2020-10-05 23:08:29,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723682154] [2020-10-05 23:08:29,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:08:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:29,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 23:08:29,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:30,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:30,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 23:08:30,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676672607] [2020-10-05 23:08:30,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:08:30,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:30,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:08:30,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:08:30,035 INFO L87 Difference]: Start difference. First operand 18623 states and 67660 transitions. Second operand 12 states. [2020-10-05 23:08:30,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:30,177 INFO L93 Difference]: Finished difference Result 18607 states and 67596 transitions. [2020-10-05 23:08:30,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 23:08:30,178 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-05 23:08:30,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:30,216 INFO L225 Difference]: With dead ends: 18607 [2020-10-05 23:08:30,216 INFO L226 Difference]: Without dead ends: 18607 [2020-10-05 23:08:30,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:08:30,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18607 states. [2020-10-05 23:08:30,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18607 to 18607. [2020-10-05 23:08:30,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18607 states. [2020-10-05 23:08:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18607 states to 18607 states and 67596 transitions. [2020-10-05 23:08:30,810 INFO L78 Accepts]: Start accepts. Automaton has 18607 states and 67596 transitions. Word has length 35 [2020-10-05 23:08:30,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:30,811 INFO L479 AbstractCegarLoop]: Abstraction has 18607 states and 67596 transitions. [2020-10-05 23:08:30,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:08:30,811 INFO L276 IsEmpty]: Start isEmpty. Operand 18607 states and 67596 transitions. [2020-10-05 23:08:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-05 23:08:30,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:30,815 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:31,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-05 23:08:31,025 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:31,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:31,025 INFO L82 PathProgramCache]: Analyzing trace with hash -131017630, now seen corresponding path program 1 times [2020-10-05 23:08:31,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:31,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231742608] [2020-10-05 23:08:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:31,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231742608] [2020-10-05 23:08:31,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973539871] [2020-10-05 23:08:31,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:08:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:31,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 23:08:31,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:31,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:31,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 23:08:31,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659556306] [2020-10-05 23:08:31,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:08:31,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:31,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:08:31,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:08:31,258 INFO L87 Difference]: Start difference. First operand 18607 states and 67596 transitions. Second operand 14 states. [2020-10-05 23:08:31,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:31,408 INFO L93 Difference]: Finished difference Result 18575 states and 67452 transitions. [2020-10-05 23:08:31,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 23:08:31,409 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-05 23:08:31,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:31,450 INFO L225 Difference]: With dead ends: 18575 [2020-10-05 23:08:31,450 INFO L226 Difference]: Without dead ends: 18575 [2020-10-05 23:08:31,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:08:31,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18575 states. [2020-10-05 23:08:31,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18575 to 18575. [2020-10-05 23:08:31,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18575 states. [2020-10-05 23:08:31,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18575 states to 18575 states and 67452 transitions. [2020-10-05 23:08:31,836 INFO L78 Accepts]: Start accepts. Automaton has 18575 states and 67452 transitions. Word has length 41 [2020-10-05 23:08:31,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:31,836 INFO L479 AbstractCegarLoop]: Abstraction has 18575 states and 67452 transitions. [2020-10-05 23:08:31,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:08:31,836 INFO L276 IsEmpty]: Start isEmpty. Operand 18575 states and 67452 transitions. [2020-10-05 23:08:31,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-05 23:08:31,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:31,843 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:32,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-05 23:08:32,058 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:32,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:32,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1557656136, now seen corresponding path program 1 times [2020-10-05 23:08:32,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:32,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421847883] [2020-10-05 23:08:32,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:32,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421847883] [2020-10-05 23:08:32,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809778119] [2020-10-05 23:08:32,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:08:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:32,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 23:08:32,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:32,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:32,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 23:08:32,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568624411] [2020-10-05 23:08:32,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:08:32,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:32,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:08:32,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:08:32,310 INFO L87 Difference]: Start difference. First operand 18575 states and 67452 transitions. Second operand 16 states. [2020-10-05 23:08:32,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:32,472 INFO L93 Difference]: Finished difference Result 18511 states and 67132 transitions. [2020-10-05 23:08:32,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 23:08:32,473 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-10-05 23:08:32,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:32,520 INFO L225 Difference]: With dead ends: 18511 [2020-10-05 23:08:32,520 INFO L226 Difference]: Without dead ends: 18511 [2020-10-05 23:08:32,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:08:32,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18511 states. [2020-10-05 23:08:33,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18511 to 18511. [2020-10-05 23:08:33,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18511 states. [2020-10-05 23:08:33,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18511 states to 18511 states and 67132 transitions. [2020-10-05 23:08:33,135 INFO L78 Accepts]: Start accepts. Automaton has 18511 states and 67132 transitions. Word has length 47 [2020-10-05 23:08:33,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:33,136 INFO L479 AbstractCegarLoop]: Abstraction has 18511 states and 67132 transitions. [2020-10-05 23:08:33,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:08:33,136 INFO L276 IsEmpty]: Start isEmpty. Operand 18511 states and 67132 transitions. [2020-10-05 23:08:33,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-05 23:08:33,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:33,139 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:33,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:33,340 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:33,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:33,340 INFO L82 PathProgramCache]: Analyzing trace with hash 230242214, now seen corresponding path program 1 times [2020-10-05 23:08:33,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:33,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564186516] [2020-10-05 23:08:33,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:08:33,358 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:08:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:08:33,374 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:08:33,384 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-05 23:08:33,384 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-05 23:08:33,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-05 23:08:33,385 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-05 23:08:33,385 WARN L363 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-05 23:08:33,385 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2020-10-05 23:08:33,395 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,395 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,395 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,395 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,395 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,395 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,396 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,396 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,396 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,396 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,396 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,396 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,397 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,397 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,397 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,397 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,397 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,397 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,397 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,398 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,398 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,398 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,398 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,398 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,398 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,398 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,398 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,399 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,399 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,399 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,399 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,399 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,399 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,399 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,400 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,400 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,400 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,400 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,400 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,400 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,400 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,400 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,401 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,401 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,401 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,401 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,401 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,401 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,401 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,402 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,402 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,402 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,403 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,403 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,403 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,404 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,404 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,405 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,405 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,405 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,406 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,406 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,406 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,406 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,407 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,407 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,407 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,407 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,408 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,408 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,409 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,409 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,410 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,410 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,410 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,410 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,411 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,411 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,411 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,411 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:08:33,416 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-05 23:08:33,417 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:08:33,417 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:08:33,417 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:08:33,417 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-05 23:08:33,417 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:08:33,417 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:08:33,417 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:08:33,417 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:08:33,419 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 126 transitions, 372 flow [2020-10-05 23:08:33,419 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 128 places, 126 transitions, 372 flow [2020-10-05 23:08:35,292 INFO L129 PetriNetUnfolder]: 1812/9659 cut-off events. [2020-10-05 23:08:35,293 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-05 23:08:35,330 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10744 conditions, 9659 events. 1812/9659 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 92403 event pairs, 522 based on Foata normal form. 0/8103 useless extension candidates. Maximal degree in co-relation 5322. Up to 1024 conditions per place. [2020-10-05 23:08:35,480 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 128 places, 126 transitions, 372 flow [2020-10-05 23:08:36,816 INFO L129 PetriNetUnfolder]: 1812/9659 cut-off events. [2020-10-05 23:08:36,816 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-05 23:08:36,858 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10744 conditions, 9659 events. 1812/9659 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 92403 event pairs, 522 based on Foata normal form. 0/8103 useless extension candidates. Maximal degree in co-relation 5322. Up to 1024 conditions per place. [2020-10-05 23:08:36,985 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 4640 [2020-10-05 23:08:36,985 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:08:38,537 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-10-05 23:08:38,860 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-05 23:08:38,972 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-05 23:08:39,380 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2020-10-05 23:08:39,495 INFO L206 etLargeBlockEncoding]: Checked pairs total: 3851 [2020-10-05 23:08:39,495 INFO L214 etLargeBlockEncoding]: Total number of compositions: 98 [2020-10-05 23:08:39,496 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 40 transitions, 200 flow [2020-10-05 23:08:46,951 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 55297 states. [2020-10-05 23:08:46,951 INFO L276 IsEmpty]: Start isEmpty. Operand 55297 states. [2020-10-05 23:08:46,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-05 23:08:46,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:46,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-05 23:08:46,952 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:46,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:46,952 INFO L82 PathProgramCache]: Analyzing trace with hash 54894463, now seen corresponding path program 1 times [2020-10-05 23:08:46,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:46,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063690282] [2020-10-05 23:08:46,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:08:46,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063690282] [2020-10-05 23:08:46,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:08:46,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:08:46,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916182567] [2020-10-05 23:08:46,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:08:46,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:46,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:08:46,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:08:46,973 INFO L87 Difference]: Start difference. First operand 55297 states. Second operand 3 states. [2020-10-05 23:08:47,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:47,296 INFO L93 Difference]: Finished difference Result 55297 states and 222749 transitions. [2020-10-05 23:08:47,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:08:47,296 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-05 23:08:47,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:47,448 INFO L225 Difference]: With dead ends: 55297 [2020-10-05 23:08:47,448 INFO L226 Difference]: Without dead ends: 48734 [2020-10-05 23:08:47,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:08:50,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48734 states. [2020-10-05 23:08:50,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48734 to 48734. [2020-10-05 23:08:50,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48734 states. [2020-10-05 23:08:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48734 states to 48734 states and 198690 transitions. [2020-10-05 23:08:50,814 INFO L78 Accepts]: Start accepts. Automaton has 48734 states and 198690 transitions. Word has length 4 [2020-10-05 23:08:50,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:50,815 INFO L479 AbstractCegarLoop]: Abstraction has 48734 states and 198690 transitions. [2020-10-05 23:08:50,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:08:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand 48734 states and 198690 transitions. [2020-10-05 23:08:50,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:08:50,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:50,815 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:50,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-05 23:08:50,815 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:50,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:50,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1411257051, now seen corresponding path program 1 times [2020-10-05 23:08:50,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:50,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239061819] [2020-10-05 23:08:50,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:08:50,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239061819] [2020-10-05 23:08:50,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:08:50,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:08:50,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637781289] [2020-10-05 23:08:50,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:08:50,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:50,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:08:50,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:08:50,839 INFO L87 Difference]: Start difference. First operand 48734 states and 198690 transitions. Second operand 4 states. [2020-10-05 23:08:51,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:51,181 INFO L93 Difference]: Finished difference Result 56827 states and 227865 transitions. [2020-10-05 23:08:51,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:08:51,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-05 23:08:51,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:51,344 INFO L225 Difference]: With dead ends: 56827 [2020-10-05 23:08:51,344 INFO L226 Difference]: Without dead ends: 56827 [2020-10-05 23:08:51,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:08:52,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56827 states. [2020-10-05 23:08:53,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56827 to 54781. [2020-10-05 23:08:53,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54781 states. [2020-10-05 23:08:53,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54781 states to 54781 states and 219674 transitions. [2020-10-05 23:08:53,702 INFO L78 Accepts]: Start accepts. Automaton has 54781 states and 219674 transitions. Word has length 10 [2020-10-05 23:08:53,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:53,702 INFO L479 AbstractCegarLoop]: Abstraction has 54781 states and 219674 transitions. [2020-10-05 23:08:53,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:08:53,702 INFO L276 IsEmpty]: Start isEmpty. Operand 54781 states and 219674 transitions. [2020-10-05 23:08:53,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:08:53,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:53,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:53,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-05 23:08:53,703 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:53,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:53,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1775097937, now seen corresponding path program 1 times [2020-10-05 23:08:53,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:53,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27362126] [2020-10-05 23:08:53,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:53,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27362126] [2020-10-05 23:08:53,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923842870] [2020-10-05 23:08:53,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:53,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-05 23:08:53,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:08:53,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:53,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2020-10-05 23:08:53,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138327762] [2020-10-05 23:08:53,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-05 23:08:53,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:53,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-05 23:08:53,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-05 23:08:53,863 INFO L87 Difference]: Start difference. First operand 54781 states and 219674 transitions. Second operand 7 states. [2020-10-05 23:08:56,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:56,653 INFO L93 Difference]: Finished difference Result 63378 states and 247554 transitions. [2020-10-05 23:08:56,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 23:08:56,654 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-05 23:08:56,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:08:56,827 INFO L225 Difference]: With dead ends: 63378 [2020-10-05 23:08:56,827 INFO L226 Difference]: Without dead ends: 63378 [2020-10-05 23:08:56,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-05 23:08:57,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63378 states. [2020-10-05 23:08:58,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63378 to 59796. [2020-10-05 23:08:58,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59796 states. [2020-10-05 23:08:59,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59796 states to 59796 states and 233988 transitions. [2020-10-05 23:08:59,206 INFO L78 Accepts]: Start accepts. Automaton has 59796 states and 233988 transitions. Word has length 17 [2020-10-05 23:08:59,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:08:59,206 INFO L479 AbstractCegarLoop]: Abstraction has 59796 states and 233988 transitions. [2020-10-05 23:08:59,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-05 23:08:59,206 INFO L276 IsEmpty]: Start isEmpty. Operand 59796 states and 233988 transitions. [2020-10-05 23:08:59,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-05 23:08:59,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:08:59,212 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:08:59,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:08:59,413 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:08:59,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:08:59,414 INFO L82 PathProgramCache]: Analyzing trace with hash -157038029, now seen corresponding path program 1 times [2020-10-05 23:08:59,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:08:59,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264183419] [2020-10-05 23:08:59,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:08:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-05 23:08:59,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264183419] [2020-10-05 23:08:59,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923680719] [2020-10-05 23:08:59,456 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2020-10-05 23:08:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:08:59,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-05 23:08:59,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:08:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-05 23:08:59,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:08:59,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-05 23:08:59,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522967899] [2020-10-05 23:08:59,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 23:08:59,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:08:59,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 23:08:59,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-10-05 23:08:59,597 INFO L87 Difference]: Start difference. First operand 59796 states and 233988 transitions. Second operand 9 states. [2020-10-05 23:08:59,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:08:59,983 INFO L93 Difference]: Finished difference Result 64269 states and 243651 transitions. [2020-10-05 23:08:59,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-05 23:08:59,984 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-05 23:08:59,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:09:00,168 INFO L225 Difference]: With dead ends: 64269 [2020-10-05 23:09:00,168 INFO L226 Difference]: Without dead ends: 64269 [2020-10-05 23:09:00,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-10-05 23:09:00,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64269 states. [2020-10-05 23:09:01,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64269 to 60687. [2020-10-05 23:09:01,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60687 states. [2020-10-05 23:09:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60687 states to 60687 states and 231362 transitions. [2020-10-05 23:09:05,655 INFO L78 Accepts]: Start accepts. Automaton has 60687 states and 231362 transitions. Word has length 30 [2020-10-05 23:09:05,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:09:05,655 INFO L479 AbstractCegarLoop]: Abstraction has 60687 states and 231362 transitions. [2020-10-05 23:09:05,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 23:09:05,655 INFO L276 IsEmpty]: Start isEmpty. Operand 60687 states and 231362 transitions. [2020-10-05 23:09:05,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-05 23:09:05,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:09:05,661 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:09:05,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-05 23:09:05,862 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:09:05,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:09:05,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1773061914, now seen corresponding path program 1 times [2020-10-05 23:09:05,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:09:05,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721023563] [2020-10-05 23:09:05,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:09:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:09:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-05 23:09:05,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721023563] [2020-10-05 23:09:05,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469900891] [2020-10-05 23:09:05,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:09:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:09:06,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-05 23:09:06,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:09:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-05 23:09:06,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:09:06,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 23:09:06,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724763930] [2020-10-05 23:09:06,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:09:06,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:09:06,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:09:06,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:09:06,058 INFO L87 Difference]: Start difference. First operand 60687 states and 231362 transitions. Second operand 10 states. [2020-10-05 23:09:06,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:09:06,405 INFO L93 Difference]: Finished difference Result 60585 states and 231143 transitions. [2020-10-05 23:09:06,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-05 23:09:06,406 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-05 23:09:06,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:09:06,569 INFO L225 Difference]: With dead ends: 60585 [2020-10-05 23:09:06,570 INFO L226 Difference]: Without dead ends: 60585 [2020-10-05 23:09:06,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:09:07,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60585 states. [2020-10-05 23:09:08,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60585 to 60585. [2020-10-05 23:09:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60585 states. [2020-10-05 23:09:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60585 states to 60585 states and 231143 transitions. [2020-10-05 23:09:09,127 INFO L78 Accepts]: Start accepts. Automaton has 60585 states and 231143 transitions. Word has length 43 [2020-10-05 23:09:09,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:09:09,127 INFO L479 AbstractCegarLoop]: Abstraction has 60585 states and 231143 transitions. [2020-10-05 23:09:09,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:09:09,127 INFO L276 IsEmpty]: Start isEmpty. Operand 60585 states and 231143 transitions. [2020-10-05 23:09:09,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-05 23:09:09,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:09:09,143 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:09:09,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:09:09,357 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:09:09,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:09:09,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1454617507, now seen corresponding path program 1 times [2020-10-05 23:09:09,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:09:09,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316785752] [2020-10-05 23:09:09,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:09:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:09:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-05 23:09:09,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316785752] [2020-10-05 23:09:09,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503755163] [2020-10-05 23:09:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:09:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:09:09,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 23:09:09,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:09:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-05 23:09:09,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:09:09,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 23:09:09,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526712100] [2020-10-05 23:09:09,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:09:09,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:09:09,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:09:09,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:09:09,592 INFO L87 Difference]: Start difference. First operand 60585 states and 231143 transitions. Second operand 12 states. [2020-10-05 23:09:09,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:09:09,942 INFO L93 Difference]: Finished difference Result 60305 states and 230407 transitions. [2020-10-05 23:09:09,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 23:09:09,943 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-05 23:09:09,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:09:10,102 INFO L225 Difference]: With dead ends: 60305 [2020-10-05 23:09:10,103 INFO L226 Difference]: Without dead ends: 60305 [2020-10-05 23:09:10,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:09:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60305 states. [2020-10-05 23:09:11,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60305 to 60305. [2020-10-05 23:09:11,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60305 states. [2020-10-05 23:09:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60305 states to 60305 states and 230407 transitions. [2020-10-05 23:09:15,851 INFO L78 Accepts]: Start accepts. Automaton has 60305 states and 230407 transitions. Word has length 49 [2020-10-05 23:09:15,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:09:15,851 INFO L479 AbstractCegarLoop]: Abstraction has 60305 states and 230407 transitions. [2020-10-05 23:09:15,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:09:15,852 INFO L276 IsEmpty]: Start isEmpty. Operand 60305 states and 230407 transitions. [2020-10-05 23:09:15,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-05 23:09:15,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:09:15,872 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:09:16,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-05 23:09:16,077 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:09:16,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:09:16,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1378182391, now seen corresponding path program 1 times [2020-10-05 23:09:16,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:09:16,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191630725] [2020-10-05 23:09:16,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:09:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:09:16,099 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:09:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:09:16,118 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:09:16,127 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-05 23:09:16,127 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-05 23:09:16,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-05 23:09:16,129 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-05 23:09:16,132 WARN L363 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-05 23:09:16,132 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2020-10-05 23:09:16,143 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,143 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,143 WARN L313 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,144 WARN L313 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,144 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,144 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,144 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,144 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,144 WARN L313 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,144 WARN L313 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,145 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,145 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,145 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,145 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,145 WARN L313 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,145 WARN L313 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,145 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,145 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,146 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,146 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,146 WARN L313 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,146 WARN L313 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,146 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,146 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,146 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,147 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,147 WARN L313 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,147 WARN L313 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,147 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,147 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,147 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,147 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,147 WARN L313 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,148 WARN L313 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,148 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,148 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,149 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,149 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,149 WARN L313 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,149 WARN L313 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,149 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,149 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,150 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,150 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,150 WARN L313 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,151 WARN L313 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,151 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,151 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,151 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,151 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,151 WARN L313 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,151 WARN L313 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,152 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,152 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,152 WARN L313 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,152 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,152 WARN L313 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,153 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,154 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,154 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,154 WARN L313 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,154 WARN L313 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,155 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,155 WARN L313 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,155 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,156 WARN L313 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,159 WARN L313 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,160 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,160 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,160 WARN L313 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,163 WARN L313 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,164 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,164 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,164 WARN L313 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,166 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,166 WARN L313 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,166 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,166 WARN L313 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,167 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,168 WARN L313 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,168 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,168 WARN L313 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,170 WARN L313 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,170 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,170 WARN L313 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,171 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,172 WARN L313 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,172 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,172 WARN L313 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,172 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:09:16,180 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-05 23:09:16,180 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:09:16,180 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:09:16,180 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:09:16,181 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-05 23:09:16,181 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:09:16,181 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:09:16,181 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:09:16,181 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:09:16,183 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 132 transitions, 408 flow [2020-10-05 23:09:16,183 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 135 places, 132 transitions, 408 flow [2020-10-05 23:09:18,517 INFO L129 PetriNetUnfolder]: 3862/19406 cut-off events. [2020-10-05 23:09:18,517 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-05 23:09:18,684 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21783 conditions, 19406 events. 3862/19406 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 214634 event pairs, 1291 based on Foata normal form. 0/16312 useless extension candidates. Maximal degree in co-relation 10726. Up to 2304 conditions per place. [2020-10-05 23:09:19,206 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 135 places, 132 transitions, 408 flow [2020-10-05 23:09:21,468 INFO L129 PetriNetUnfolder]: 3862/19406 cut-off events. [2020-10-05 23:09:21,469 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-05 23:09:21,624 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21783 conditions, 19406 events. 3862/19406 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 214634 event pairs, 1291 based on Foata normal form. 0/16312 useless extension candidates. Maximal degree in co-relation 10726. Up to 2304 conditions per place. [2020-10-05 23:09:22,051 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 5472 [2020-10-05 23:09:22,051 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:09:23,424 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-05 23:09:23,954 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-05 23:09:24,355 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-10-05 23:09:24,464 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-05 23:09:24,691 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-05 23:09:24,798 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-05 23:09:24,803 INFO L206 etLargeBlockEncoding]: Checked pairs total: 4378 [2020-10-05 23:09:24,804 INFO L214 etLargeBlockEncoding]: Total number of compositions: 98 [2020-10-05 23:09:24,804 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 43 transitions, 230 flow [2020-10-05 23:10:18,885 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 163089 states. [2020-10-05 23:10:18,886 INFO L276 IsEmpty]: Start isEmpty. Operand 163089 states. [2020-10-05 23:10:18,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-05 23:10:18,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:10:18,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-05 23:10:18,886 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:10:18,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:10:18,887 INFO L82 PathProgramCache]: Analyzing trace with hash 62348159, now seen corresponding path program 1 times [2020-10-05 23:10:18,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:10:18,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328956143] [2020-10-05 23:10:18,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:10:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:10:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:10:18,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328956143] [2020-10-05 23:10:18,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:10:18,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:10:18,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708907362] [2020-10-05 23:10:18,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:10:18,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:10:18,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:10:18,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:10:18,903 INFO L87 Difference]: Start difference. First operand 163089 states. Second operand 3 states. [2020-10-05 23:10:19,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:10:19,893 INFO L93 Difference]: Finished difference Result 163089 states and 717318 transitions. [2020-10-05 23:10:19,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:10:19,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-05 23:10:19,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:10:20,427 INFO L225 Difference]: With dead ends: 163089 [2020-10-05 23:10:20,427 INFO L226 Difference]: Without dead ends: 143404 [2020-10-05 23:10:20,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:10:25,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143404 states. [2020-10-05 23:10:33,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143404 to 143404. [2020-10-05 23:10:33,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143404 states. [2020-10-05 23:10:34,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143404 states to 143404 states and 638584 transitions. [2020-10-05 23:10:34,510 INFO L78 Accepts]: Start accepts. Automaton has 143404 states and 638584 transitions. Word has length 4 [2020-10-05 23:10:34,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:10:34,510 INFO L479 AbstractCegarLoop]: Abstraction has 143404 states and 638584 transitions. [2020-10-05 23:10:34,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:10:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand 143404 states and 638584 transitions. [2020-10-05 23:10:34,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:10:34,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:10:34,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:10:34,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-05 23:10:34,511 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:10:34,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:10:34,512 INFO L82 PathProgramCache]: Analyzing trace with hash 288657511, now seen corresponding path program 1 times [2020-10-05 23:10:34,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:10:34,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769751013] [2020-10-05 23:10:34,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:10:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:10:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:10:34,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769751013] [2020-10-05 23:10:34,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:10:34,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:10:34,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544479655] [2020-10-05 23:10:34,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:10:34,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:10:34,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:10:34,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:10:34,536 INFO L87 Difference]: Start difference. First operand 143404 states and 638584 transitions. Second operand 4 states. [2020-10-05 23:10:36,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:10:36,861 INFO L93 Difference]: Finished difference Result 166667 states and 731394 transitions. [2020-10-05 23:10:36,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:10:36,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-05 23:10:36,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:10:37,466 INFO L225 Difference]: With dead ends: 166667 [2020-10-05 23:10:37,466 INFO L226 Difference]: Without dead ends: 166667 [2020-10-05 23:10:37,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:10:50,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166667 states. [2020-10-05 23:10:53,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166667 to 162061. [2020-10-05 23:10:53,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162061 states. [2020-10-05 23:11:01,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162061 states to 162061 states and 710659 transitions. [2020-10-05 23:11:01,981 INFO L78 Accepts]: Start accepts. Automaton has 162061 states and 710659 transitions. Word has length 10 [2020-10-05 23:11:01,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:11:01,981 INFO L479 AbstractCegarLoop]: Abstraction has 162061 states and 710659 transitions. [2020-10-05 23:11:01,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:11:01,981 INFO L276 IsEmpty]: Start isEmpty. Operand 162061 states and 710659 transitions. [2020-10-05 23:11:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:11:01,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:11:01,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:11:01,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-05 23:11:01,982 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:11:01,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:11:01,982 INFO L82 PathProgramCache]: Analyzing trace with hash 941132211, now seen corresponding path program 1 times [2020-10-05 23:11:01,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:11:01,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408575241] [2020-10-05 23:11:01,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:11:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:11:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:11:02,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408575241] [2020-10-05 23:11:02,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870807414] [2020-10-05 23:11:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:11:02,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:11:02,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-05 23:11:02,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:11:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:11:02,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:11:02,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-05 23:11:02,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423711179] [2020-10-05 23:11:02,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:11:02,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:11:02,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:11:02,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:11:02,122 INFO L87 Difference]: Start difference. First operand 162061 states and 710659 transitions. Second operand 6 states. [2020-10-05 23:11:03,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:11:03,091 INFO L93 Difference]: Finished difference Result 162059 states and 710654 transitions. [2020-10-05 23:11:03,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:11:03,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-05 23:11:03,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:11:09,801 INFO L225 Difference]: With dead ends: 162059 [2020-10-05 23:11:09,801 INFO L226 Difference]: Without dead ends: 162059 [2020-10-05 23:11:09,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:11:14,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162059 states. [2020-10-05 23:11:17,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162059 to 162059. [2020-10-05 23:11:17,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162059 states. [2020-10-05 23:11:18,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162059 states to 162059 states and 710654 transitions. [2020-10-05 23:11:18,006 INFO L78 Accepts]: Start accepts. Automaton has 162059 states and 710654 transitions. Word has length 17 [2020-10-05 23:11:18,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:11:18,007 INFO L479 AbstractCegarLoop]: Abstraction has 162059 states and 710654 transitions. [2020-10-05 23:11:18,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:11:18,007 INFO L276 IsEmpty]: Start isEmpty. Operand 162059 states and 710654 transitions. [2020-10-05 23:11:18,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:11:18,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:11:18,007 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:11:18,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:11:18,208 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:11:18,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:11:18,209 INFO L82 PathProgramCache]: Analyzing trace with hash -220199302, now seen corresponding path program 1 times [2020-10-05 23:11:18,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:11:18,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857589933] [2020-10-05 23:11:18,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:11:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:11:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:11:18,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857589933] [2020-10-05 23:11:18,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490424032] [2020-10-05 23:11:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-05 23:11:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:11:18,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-05 23:11:18,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:11:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:11:18,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:11:18,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-05 23:11:18,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589127862] [2020-10-05 23:11:18,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:11:18,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:11:18,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:11:18,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:11:18,397 INFO L87 Difference]: Start difference. First operand 162059 states and 710654 transitions. Second operand 8 states. Received shutdown request... [2020-10-05 23:11:24,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 23:11:24,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-10-05 23:11:24,290 WARN L544 AbstractCegarLoop]: Verification canceled [2020-10-05 23:11:24,297 WARN L228 ceAbstractionStarter]: Timeout [2020-10-05 23:11:24,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 11:11:24 BasicIcfg [2020-10-05 23:11:24,297 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-05 23:11:24,299 INFO L168 Benchmark]: Toolchain (without parser) took 214186.54 ms. Allocated memory was 141.0 MB in the beginning and 3.7 GB in the end (delta: 3.6 GB). Free memory was 101.9 MB in the beginning and 2.5 GB in the end (delta: -2.4 GB). Peak memory consumption was 3.2 GB. Max. memory is 7.1 GB. [2020-10-05 23:11:24,300 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-10-05 23:11:24,300 INFO L168 Benchmark]: CACSL2BoogieTranslator took 879.06 ms. Allocated memory was 141.0 MB in the beginning and 205.5 MB in the end (delta: 64.5 MB). Free memory was 101.5 MB in the beginning and 122.7 MB in the end (delta: -21.3 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. [2020-10-05 23:11:24,301 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.74 ms. Allocated memory is still 205.5 MB. Free memory was 122.7 MB in the beginning and 120.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-10-05 23:11:24,301 INFO L168 Benchmark]: Boogie Preprocessor took 33.42 ms. Allocated memory is still 205.5 MB. Free memory was 120.1 MB in the beginning and 118.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-05 23:11:24,302 INFO L168 Benchmark]: RCFGBuilder took 502.20 ms. Allocated memory was 205.5 MB in the beginning and 235.9 MB in the end (delta: 30.4 MB). Free memory was 118.7 MB in the beginning and 205.7 MB in the end (delta: -87.0 MB). Peak memory consumption was 30.2 MB. Max. memory is 7.1 GB. [2020-10-05 23:11:24,302 INFO L168 Benchmark]: TraceAbstraction took 212713.50 ms. Allocated memory was 235.9 MB in the beginning and 3.7 GB in the end (delta: 3.5 GB). Free memory was 204.3 MB in the beginning and 2.5 GB in the end (delta: -2.3 GB). Peak memory consumption was 3.2 GB. Max. memory is 7.1 GB. [2020-10-05 23:11:24,309 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 879.06 ms. Allocated memory was 141.0 MB in the beginning and 205.5 MB in the end (delta: 64.5 MB). Free memory was 101.5 MB in the beginning and 122.7 MB in the end (delta: -21.3 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 52.74 ms. Allocated memory is still 205.5 MB. Free memory was 122.7 MB in the beginning and 120.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.42 ms. Allocated memory is still 205.5 MB. Free memory was 120.1 MB in the beginning and 118.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 502.20 ms. Allocated memory was 205.5 MB in the beginning and 235.9 MB in the end (delta: 30.4 MB). Free memory was 118.7 MB in the beginning and 205.7 MB in the end (delta: -87.0 MB). Peak memory consumption was 30.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 212713.50 ms. Allocated memory was 235.9 MB in the beginning and 3.7 GB in the end (delta: 3.5 GB). Free memory was 204.3 MB in the beginning and 2.5 GB in the end (delta: -2.3 GB). Peak memory consumption was 3.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.0s, 79 ProgramPointsBefore, 18 ProgramPointsAfterwards, 84 TransitionsBefore, 17 TransitionsAfterwards, 344 CoEnabledTransitionPairs, 7 FixpointIterations, 33 TrivialSequentialCompositions, 28 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 163 VarBasedMoverChecksPositive, 14 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 293 CheckedPairsTotal, 77 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.1s, 86 ProgramPointsBefore, 24 ProgramPointsAfterwards, 90 TransitionsBefore, 22 TransitionsAfterwards, 824 CoEnabledTransitionPairs, 8 FixpointIterations, 33 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 8 ConcurrentYvCompositions, 6 ChoiceCompositions, 391 VarBasedMoverChecksPositive, 15 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 676 CheckedPairsTotal, 79 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.2s, 93 ProgramPointsBefore, 28 ProgramPointsAfterwards, 96 TransitionsBefore, 25 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 8 FixpointIterations, 29 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 9 ConcurrentYvCompositions, 6 ChoiceCompositions, 618 VarBasedMoverChecksPositive, 17 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 1092 CheckedPairsTotal, 84 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.1s, 100 ProgramPointsBefore, 32 ProgramPointsAfterwards, 102 TransitionsBefore, 28 TransitionsAfterwards, 1872 CoEnabledTransitionPairs, 7 FixpointIterations, 28 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 903 VarBasedMoverChecksPositive, 26 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 1730 CheckedPairsTotal, 84 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.3s, 107 ProgramPointsBefore, 36 ProgramPointsAfterwards, 108 TransitionsBefore, 31 TransitionsAfterwards, 2480 CoEnabledTransitionPairs, 7 FixpointIterations, 29 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 10 ConcurrentYvCompositions, 6 ChoiceCompositions, 1168 VarBasedMoverChecksPositive, 17 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 1953 CheckedPairsTotal, 87 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.7s, 114 ProgramPointsBefore, 40 ProgramPointsAfterwards, 114 TransitionsBefore, 34 TransitionsAfterwards, 3144 CoEnabledTransitionPairs, 7 FixpointIterations, 29 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 10 ConcurrentYvCompositions, 6 ChoiceCompositions, 1453 VarBasedMoverChecksPositive, 17 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 2432 CheckedPairsTotal, 90 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 4.2s, 121 ProgramPointsBefore, 44 ProgramPointsAfterwards, 120 TransitionsBefore, 37 TransitionsAfterwards, 3864 CoEnabledTransitionPairs, 7 FixpointIterations, 29 TrivialSequentialCompositions, 49 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 1791 VarBasedMoverChecksPositive, 23 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 3124 CheckedPairsTotal, 95 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 6.0s, 128 ProgramPointsBefore, 48 ProgramPointsAfterwards, 126 TransitionsBefore, 40 TransitionsAfterwards, 4640 CoEnabledTransitionPairs, 7 FixpointIterations, 29 TrivialSequentialCompositions, 51 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 2195 VarBasedMoverChecksPositive, 33 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 3851 CheckedPairsTotal, 98 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 8.6s, 135 ProgramPointsBefore, 52 ProgramPointsAfterwards, 132 TransitionsBefore, 43 TransitionsAfterwards, 5472 CoEnabledTransitionPairs, 7 FixpointIterations, 28 TrivialSequentialCompositions, 56 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 9 ConcurrentYvCompositions, 6 ChoiceCompositions, 2521 VarBasedMoverChecksPositive, 29 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 4378 CheckedPairsTotal, 98 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 1092]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1092). Cancelled while BasicCegarLoop was constructing difference of abstraction (162059states) and FLOYD_HOARE automaton (currently 5 states, 8 states before enhancement),while ReachableStatesComputation was computing reachable states (54126 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 76 locations, 1 error locations. Started 9 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 212.3s, OverallIterations: 53, TraceHistogramMax: 9, AutomataDifference: 28.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 95.9s, HoareTripleCheckerStatistics: 1310 SDtfs, 1883 SDslu, 2558 SDs, 0 SdLazy, 1510 SolverSat, 115 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 887 GetRequests, 666 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=163089occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 75.9s AutomataMinimizationTime, 44 MinimizatonAttempts, 15340 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 1872 NumberOfCodeBlocks, 1872 NumberOfCodeBlocksAsserted, 80 NumberOfCheckSat, 1545 ConstructedInterpolants, 0 QuantifiedInterpolants, 200607 SizeOfPredicates, 27 NumberOfNonLiveVariables, 3828 ConjunctsInSsa, 150 ConjunctsInUnsatCore, 72 InterpolantComputations, 18 PerfectInterpolantSequences, 212/1317 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