./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/triangular-longer-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8af9a5e42a926b48ec88df7d3b462c2ff98a725e ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 02:45:01,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 02:45:01,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 02:45:01,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 02:45:01,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 02:45:01,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 02:45:01,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 02:45:01,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 02:45:01,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 02:45:01,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 02:45:01,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 02:45:01,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 02:45:01,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 02:45:01,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 02:45:01,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 02:45:01,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 02:45:01,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 02:45:01,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 02:45:01,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 02:45:01,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 02:45:01,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 02:45:01,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 02:45:01,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 02:45:01,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 02:45:01,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 02:45:01,835 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 02:45:01,835 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 02:45:01,836 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 02:45:01,837 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 02:45:01,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 02:45:01,838 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 02:45:01,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 02:45:01,840 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 02:45:01,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 02:45:01,841 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 02:45:01,842 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 02:45:01,842 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 02:45:01,843 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 02:45:01,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 02:45:01,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 02:45:01,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 02:45:01,845 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 02:45:01,895 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 02:45:01,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 02:45:01,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 02:45:01,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 02:45:01,900 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 02:45:01,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 02:45:01,901 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 02:45:01,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 02:45:01,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 02:45:01,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 02:45:01,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 02:45:01,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 02:45:01,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 02:45:01,902 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 02:45:01,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 02:45:01,903 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 02:45:01,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 02:45:01,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 02:45:01,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 02:45:01,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 02:45:01,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 02:45:01,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 02:45:01,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 02:45:01,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 02:45:01,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 02:45:01,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 02:45:01,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 02:45:01,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 02:45:01,906 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 02:45:01,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8af9a5e42a926b48ec88df7d3b462c2ff98a725e [2020-10-20 02:45:02,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 02:45:02,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 02:45:02,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 02:45:02,103 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 02:45:02,103 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 02:45:02,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longer-1.i [2020-10-20 02:45:02,164 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/392d95f03/b58694de7d354edaa0b9af50b8fde670/FLAG29accdaac [2020-10-20 02:45:02,769 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 02:45:02,769 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-1.i [2020-10-20 02:45:02,786 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/392d95f03/b58694de7d354edaa0b9af50b8fde670/FLAG29accdaac [2020-10-20 02:45:03,107 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/392d95f03/b58694de7d354edaa0b9af50b8fde670 [2020-10-20 02:45:03,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 02:45:03,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 02:45:03,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 02:45:03,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 02:45:03,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 02:45:03,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 02:45:03" (1/1) ... [2020-10-20 02:45:03,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3137fd7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:03, skipping insertion in model container [2020-10-20 02:45:03,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 02:45:03" (1/1) ... [2020-10-20 02:45:03,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 02:45:03,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 02:45:03,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 02:45:03,609 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 02:45:03,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 02:45:03,773 INFO L208 MainTranslator]: Completed translation [2020-10-20 02:45:03,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:03 WrapperNode [2020-10-20 02:45:03,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 02:45:03,775 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 02:45:03,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 02:45:03,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 02:45:03,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:03" (1/1) ... [2020-10-20 02:45:03,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:03" (1/1) ... [2020-10-20 02:45:03,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 02:45:03,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 02:45:03,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 02:45:03,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 02:45:03,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:03" (1/1) ... [2020-10-20 02:45:03,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:03" (1/1) ... [2020-10-20 02:45:03,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:03" (1/1) ... [2020-10-20 02:45:03,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:03" (1/1) ... [2020-10-20 02:45:03,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:03" (1/1) ... [2020-10-20 02:45:03,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:03" (1/1) ... [2020-10-20 02:45:03,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:03" (1/1) ... [2020-10-20 02:45:03,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 02:45:03,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 02:45:03,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 02:45:03,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 02:45:03,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:03" (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 [2020-10-20 02:45:03,907 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-20 02:45:03,907 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-20 02:45:03,907 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-20 02:45:03,907 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-20 02:45:03,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 02:45:03,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-20 02:45:03,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 02:45:03,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 02:45:03,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 02:45:03,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-20 02:45:03,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 02:45:03,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 02:45:03,917 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-20 02:45:04,294 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 02:45:04,295 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-20 02:45:04,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 02:45:04 BoogieIcfgContainer [2020-10-20 02:45:04,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 02:45:04,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 02:45:04,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 02:45:04,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 02:45:04,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 02:45:03" (1/3) ... [2020-10-20 02:45:04,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e763e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 02:45:04, skipping insertion in model container [2020-10-20 02:45:04,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:03" (2/3) ... [2020-10-20 02:45:04,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e763e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 02:45:04, skipping insertion in model container [2020-10-20 02:45:04,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 02:45:04" (3/3) ... [2020-10-20 02:45:04,305 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-10-20 02:45:04,313 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-20 02:45:04,314 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 02:45:04,320 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 02:45:04,321 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-20 02:45:04,346 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,346 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,346 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,347 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,347 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,348 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,348 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,348 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,349 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,349 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,349 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,349 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,350 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,350 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,351 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,351 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,351 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,351 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,352 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,352 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,352 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,353 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,353 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,354 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,354 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,354 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,354 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,355 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,358 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,359 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,359 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,359 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,359 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,360 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,368 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,368 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,368 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,368 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,369 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,369 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:04,371 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-20 02:45:04,385 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-20 02:45:04,405 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 02:45:04,406 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 02:45:04,406 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 02:45:04,406 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 02:45:04,406 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 02:45:04,407 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 02:45:04,407 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 02:45:04,407 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 02:45:04,419 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-20 02:45:04,422 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-20 02:45:04,425 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-20 02:45:04,427 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-10-20 02:45:04,465 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-10-20 02:45:04,466 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-20 02:45:04,471 INFO L80 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-10-20 02:45:04,474 INFO L117 LiptonReduction]: Number of co-enabled transitions 1144 [2020-10-20 02:45:05,791 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-20 02:45:06,231 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-20 02:45:06,360 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-20 02:45:06,415 INFO L132 LiptonReduction]: Checked pairs total: 1187 [2020-10-20 02:45:06,415 INFO L134 LiptonReduction]: Total number of compositions: 62 [2020-10-20 02:45:06,425 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-20 02:45:06,436 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-20 02:45:06,438 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-20 02:45:06,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 02:45:06,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:06,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 02:45:06,444 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:06,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:06,449 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-10-20 02:45:06,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:06,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299406567] [2020-10-20 02:45:06,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:06,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299406567] [2020-10-20 02:45:06,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:45:06,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 02:45:06,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172231868] [2020-10-20 02:45:06,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 02:45:06,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:06,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 02:45:06,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 02:45:06,713 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-20 02:45:06,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:06,784 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-20 02:45:06,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 02:45:06,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-20 02:45:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:06,797 INFO L225 Difference]: With dead ends: 75 [2020-10-20 02:45:06,797 INFO L226 Difference]: Without dead ends: 42 [2020-10-20 02:45:06,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 02:45:06,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-20 02:45:06,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-20 02:45:06,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-20 02:45:06,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-20 02:45:06,851 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-20 02:45:06,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:06,851 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-20 02:45:06,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 02:45:06,852 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-20 02:45:06,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 02:45:06,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:06,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:06,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 02:45:06,853 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:06,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:06,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-10-20 02:45:06,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:06,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721654316] [2020-10-20 02:45:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:06,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:06,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721654316] [2020-10-20 02:45:06,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:45:06,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 02:45:06,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136822174] [2020-10-20 02:45:06,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 02:45:06,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:06,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 02:45:06,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 02:45:06,971 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-20 02:45:07,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:07,005 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-20 02:45:07,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 02:45:07,006 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-20 02:45:07,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:07,007 INFO L225 Difference]: With dead ends: 56 [2020-10-20 02:45:07,007 INFO L226 Difference]: Without dead ends: 50 [2020-10-20 02:45:07,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-20 02:45:07,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-20 02:45:07,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-20 02:45:07,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-20 02:45:07,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-20 02:45:07,016 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-20 02:45:07,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:07,017 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-20 02:45:07,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 02:45:07,017 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-20 02:45:07,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 02:45:07,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:07,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:07,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 02:45:07,019 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:07,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:07,019 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-10-20 02:45:07,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:07,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319912833] [2020-10-20 02:45:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:07,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319912833] [2020-10-20 02:45:07,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:45:07,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 02:45:07,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265635323] [2020-10-20 02:45:07,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 02:45:07,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:07,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 02:45:07,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 02:45:07,139 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-20 02:45:07,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:07,220 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-10-20 02:45:07,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 02:45:07,231 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-20 02:45:07,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:07,232 INFO L225 Difference]: With dead ends: 54 [2020-10-20 02:45:07,233 INFO L226 Difference]: Without dead ends: 47 [2020-10-20 02:45:07,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-20 02:45:07,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-20 02:45:07,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-20 02:45:07,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-20 02:45:07,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-10-20 02:45:07,239 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-10-20 02:45:07,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:07,240 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-10-20 02:45:07,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 02:45:07,240 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-10-20 02:45:07,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 02:45:07,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:07,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:07,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 02:45:07,241 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:07,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:07,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2101929440, now seen corresponding path program 2 times [2020-10-20 02:45:07,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:07,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184241801] [2020-10-20 02:45:07,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:07,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184241801] [2020-10-20 02:45:07,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:45:07,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 02:45:07,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523701672] [2020-10-20 02:45:07,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 02:45:07,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:07,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 02:45:07,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 02:45:07,320 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-10-20 02:45:07,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:07,395 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2020-10-20 02:45:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 02:45:07,396 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-20 02:45:07,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:07,397 INFO L225 Difference]: With dead ends: 59 [2020-10-20 02:45:07,397 INFO L226 Difference]: Without dead ends: 53 [2020-10-20 02:45:07,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-20 02:45:07,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-20 02:45:07,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2020-10-20 02:45:07,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-20 02:45:07,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 96 transitions. [2020-10-20 02:45:07,403 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 96 transitions. Word has length 10 [2020-10-20 02:45:07,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:07,404 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 96 transitions. [2020-10-20 02:45:07,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 02:45:07,404 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 96 transitions. [2020-10-20 02:45:07,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 02:45:07,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:07,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:07,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 02:45:07,405 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:07,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:07,406 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 3 times [2020-10-20 02:45:07,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:07,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033132081] [2020-10-20 02:45:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:07,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033132081] [2020-10-20 02:45:07,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:45:07,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 02:45:07,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885673738] [2020-10-20 02:45:07,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 02:45:07,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:07,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 02:45:07,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 02:45:07,483 INFO L87 Difference]: Start difference. First operand 41 states and 96 transitions. Second operand 6 states. [2020-10-20 02:45:07,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:07,568 INFO L93 Difference]: Finished difference Result 65 states and 152 transitions. [2020-10-20 02:45:07,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 02:45:07,569 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-20 02:45:07,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:07,570 INFO L225 Difference]: With dead ends: 65 [2020-10-20 02:45:07,570 INFO L226 Difference]: Without dead ends: 52 [2020-10-20 02:45:07,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-20 02:45:07,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-20 02:45:07,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2020-10-20 02:45:07,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-20 02:45:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-10-20 02:45:07,578 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-10-20 02:45:07,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:07,578 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-10-20 02:45:07,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 02:45:07,579 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-10-20 02:45:07,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 02:45:07,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:07,580 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:07,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 02:45:07,580 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:07,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:07,580 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 4 times [2020-10-20 02:45:07,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:07,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488185117] [2020-10-20 02:45:07,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:07,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488185117] [2020-10-20 02:45:07,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364665186] [2020-10-20 02:45:07,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:07,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 02:45:07,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:07,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 02:45:07,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:07,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:07,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:07,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-20 02:45:07,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361907516] [2020-10-20 02:45:07,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 02:45:07,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:07,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 02:45:07,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-20 02:45:07,769 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-10-20 02:45:07,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:07,935 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-10-20 02:45:07,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 02:45:07,936 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-20 02:45:07,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:07,937 INFO L225 Difference]: With dead ends: 63 [2020-10-20 02:45:07,937 INFO L226 Difference]: Without dead ends: 54 [2020-10-20 02:45:07,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-20 02:45:07,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-20 02:45:07,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-10-20 02:45:07,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-20 02:45:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-10-20 02:45:07,942 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-10-20 02:45:07,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:07,943 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-10-20 02:45:07,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 02:45:07,943 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-10-20 02:45:07,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 02:45:07,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:07,944 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:08,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-20 02:45:08,146 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:08,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:08,146 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 5 times [2020-10-20 02:45:08,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:08,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687871165] [2020-10-20 02:45:08,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:08,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687871165] [2020-10-20 02:45:08,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891724427] [2020-10-20 02:45:08,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:08,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:08,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:08,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 02:45:08,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:08,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:08,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:08,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-20 02:45:08,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781295789] [2020-10-20 02:45:08,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 02:45:08,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:08,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 02:45:08,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-20 02:45:08,346 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 8 states. [2020-10-20 02:45:08,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:08,444 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-10-20 02:45:08,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 02:45:08,445 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-20 02:45:08,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:08,446 INFO L225 Difference]: With dead ends: 56 [2020-10-20 02:45:08,446 INFO L226 Difference]: Without dead ends: 51 [2020-10-20 02:45:08,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-20 02:45:08,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-20 02:45:08,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-10-20 02:45:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-20 02:45:08,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-20 02:45:08,452 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-20 02:45:08,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:08,452 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-20 02:45:08,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 02:45:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-20 02:45:08,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 02:45:08,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:08,454 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:08,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:08,666 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:08,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:08,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 6 times [2020-10-20 02:45:08,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:08,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185066915] [2020-10-20 02:45:08,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:08,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185066915] [2020-10-20 02:45:08,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783552450] [2020-10-20 02:45:08,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:08,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-20 02:45:08,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:08,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 02:45:08,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:08,847 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:08,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:08,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-20 02:45:08,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453788762] [2020-10-20 02:45:08,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 02:45:08,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:08,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 02:45:08,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-20 02:45:08,867 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-20 02:45:08,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:08,968 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-10-20 02:45:08,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 02:45:08,969 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-20 02:45:08,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:08,970 INFO L225 Difference]: With dead ends: 56 [2020-10-20 02:45:08,970 INFO L226 Difference]: Without dead ends: 50 [2020-10-20 02:45:08,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-10-20 02:45:08,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-20 02:45:08,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-10-20 02:45:08,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-20 02:45:08,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-20 02:45:08,975 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-10-20 02:45:08,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:08,975 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-20 02:45:08,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 02:45:08,975 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-20 02:45:08,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 02:45:08,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:08,976 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:09,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:09,177 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:09,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:09,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 7 times [2020-10-20 02:45:09,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:09,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411700286] [2020-10-20 02:45:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:09,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411700286] [2020-10-20 02:45:09,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469814729] [2020-10-20 02:45:09,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:09,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 02:45:09,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:09,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:09,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:09,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 02:45:09,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891843597] [2020-10-20 02:45:09,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 02:45:09,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:09,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 02:45:09,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-20 02:45:09,341 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-10-20 02:45:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:09,513 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-10-20 02:45:09,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 02:45:09,514 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-20 02:45:09,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:09,515 INFO L225 Difference]: With dead ends: 63 [2020-10-20 02:45:09,515 INFO L226 Difference]: Without dead ends: 58 [2020-10-20 02:45:09,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-20 02:45:09,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-20 02:45:09,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-10-20 02:45:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-20 02:45:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-20 02:45:09,520 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 12 [2020-10-20 02:45:09,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:09,520 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-20 02:45:09,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 02:45:09,520 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-20 02:45:09,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 02:45:09,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:09,521 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:09,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:09,733 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:09,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:09,733 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 8 times [2020-10-20 02:45:09,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:09,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291332010] [2020-10-20 02:45:09,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:09,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291332010] [2020-10-20 02:45:09,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779254520] [2020-10-20 02:45:09,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:09,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:09,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:09,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 02:45:09,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:09,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:09,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 02:45:09,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257545661] [2020-10-20 02:45:09,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 02:45:09,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:09,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 02:45:09,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-20 02:45:09,899 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-10-20 02:45:10,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:10,065 INFO L93 Difference]: Finished difference Result 71 states and 167 transitions. [2020-10-20 02:45:10,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 02:45:10,065 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-20 02:45:10,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:10,066 INFO L225 Difference]: With dead ends: 71 [2020-10-20 02:45:10,066 INFO L226 Difference]: Without dead ends: 62 [2020-10-20 02:45:10,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-20 02:45:10,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-20 02:45:10,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-10-20 02:45:10,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-20 02:45:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-20 02:45:10,079 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-10-20 02:45:10,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:10,080 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-20 02:45:10,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 02:45:10,080 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-20 02:45:10,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 02:45:10,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:10,081 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:10,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-20 02:45:10,293 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:10,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 9 times [2020-10-20 02:45:10,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:10,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170080938] [2020-10-20 02:45:10,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:10,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170080938] [2020-10-20 02:45:10,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420517329] [2020-10-20 02:45:10,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:10,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-20 02:45:10,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:10,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 02:45:10,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:10,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:10,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:10,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 02:45:10,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572562235] [2020-10-20 02:45:10,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 02:45:10,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:10,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 02:45:10,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-20 02:45:10,459 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-20 02:45:10,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:10,722 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-10-20 02:45:10,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-20 02:45:10,722 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-20 02:45:10,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:10,723 INFO L225 Difference]: With dead ends: 72 [2020-10-20 02:45:10,723 INFO L226 Difference]: Without dead ends: 63 [2020-10-20 02:45:10,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-20 02:45:10,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-20 02:45:10,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-10-20 02:45:10,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-20 02:45:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-20 02:45:10,729 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-10-20 02:45:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:10,730 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-20 02:45:10,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 02:45:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-20 02:45:10,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 02:45:10,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:10,731 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:10,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:10,939 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:10,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:10,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 10 times [2020-10-20 02:45:10,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:10,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365463596] [2020-10-20 02:45:10,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:11,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365463596] [2020-10-20 02:45:11,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096686420] [2020-10-20 02:45:11,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:11,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 02:45:11,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:11,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 02:45:11,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:11,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:11,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:11,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 02:45:11,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217170213] [2020-10-20 02:45:11,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 02:45:11,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:11,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 02:45:11,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-20 02:45:11,118 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 10 states. [2020-10-20 02:45:11,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:11,313 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-20 02:45:11,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 02:45:11,315 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-20 02:45:11,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:11,316 INFO L225 Difference]: With dead ends: 64 [2020-10-20 02:45:11,317 INFO L226 Difference]: Without dead ends: 59 [2020-10-20 02:45:11,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-20 02:45:11,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-20 02:45:11,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-10-20 02:45:11,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-20 02:45:11,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-20 02:45:11,329 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-20 02:45:11,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:11,329 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-20 02:45:11,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 02:45:11,330 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-20 02:45:11,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 02:45:11,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:11,332 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:11,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:11,533 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:11,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:11,534 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 11 times [2020-10-20 02:45:11,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:11,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402759502] [2020-10-20 02:45:11,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:11,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:11,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402759502] [2020-10-20 02:45:11,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121231798] [2020-10-20 02:45:11,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:11,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-20 02:45:11,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:11,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 02:45:11,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:11,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:11,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:11,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-20 02:45:11,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313416481] [2020-10-20 02:45:11,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 02:45:11,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:11,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 02:45:11,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-20 02:45:11,737 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-20 02:45:11,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:11,902 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-10-20 02:45:11,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 02:45:11,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-20 02:45:11,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:11,904 INFO L225 Difference]: With dead ends: 64 [2020-10-20 02:45:11,904 INFO L226 Difference]: Without dead ends: 58 [2020-10-20 02:45:11,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-20 02:45:11,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-20 02:45:11,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-20 02:45:11,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-20 02:45:11,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-20 02:45:11,909 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-10-20 02:45:11,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:11,909 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-20 02:45:11,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 02:45:11,910 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-20 02:45:11,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 02:45:11,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:11,911 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:12,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-20 02:45:12,121 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:12,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:12,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 12 times [2020-10-20 02:45:12,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:12,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493808835] [2020-10-20 02:45:12,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:12,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493808835] [2020-10-20 02:45:12,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681649234] [2020-10-20 02:45:12,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:12,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-20 02:45:12,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:12,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 02:45:12,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:12,263 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:12,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:12,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 02:45:12,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117551439] [2020-10-20 02:45:12,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 02:45:12,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:12,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 02:45:12,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-20 02:45:12,275 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-10-20 02:45:12,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:12,547 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-20 02:45:12,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 02:45:12,547 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-20 02:45:12,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:12,548 INFO L225 Difference]: With dead ends: 73 [2020-10-20 02:45:12,548 INFO L226 Difference]: Without dead ends: 68 [2020-10-20 02:45:12,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-20 02:45:12,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-20 02:45:12,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-10-20 02:45:12,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-20 02:45:12,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-20 02:45:12,552 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 14 [2020-10-20 02:45:12,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:12,553 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-20 02:45:12,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 02:45:12,553 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-20 02:45:12,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 02:45:12,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:12,554 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:12,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:12,762 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:12,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:12,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 13 times [2020-10-20 02:45:12,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:12,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352588265] [2020-10-20 02:45:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:12,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352588265] [2020-10-20 02:45:12,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145463026] [2020-10-20 02:45:12,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:12,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 02:45:12,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:12,934 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:12,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:12,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 02:45:12,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484850308] [2020-10-20 02:45:12,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 02:45:12,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:12,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 02:45:12,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-20 02:45:12,945 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-10-20 02:45:13,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:13,248 INFO L93 Difference]: Finished difference Result 81 states and 191 transitions. [2020-10-20 02:45:13,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-20 02:45:13,253 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-20 02:45:13,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:13,254 INFO L225 Difference]: With dead ends: 81 [2020-10-20 02:45:13,254 INFO L226 Difference]: Without dead ends: 72 [2020-10-20 02:45:13,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-10-20 02:45:13,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-20 02:45:13,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-20 02:45:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-20 02:45:13,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-20 02:45:13,259 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-10-20 02:45:13,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:13,259 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-20 02:45:13,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 02:45:13,260 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-20 02:45:13,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 02:45:13,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:13,260 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:13,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-20 02:45:13,472 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:13,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:13,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 14 times [2020-10-20 02:45:13,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:13,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660004704] [2020-10-20 02:45:13,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:13,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660004704] [2020-10-20 02:45:13,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259226702] [2020-10-20 02:45:13,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-20 02:45:13,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:13,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:13,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 02:45:13,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:13,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:13,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 02:45:13,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939029890] [2020-10-20 02:45:13,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 02:45:13,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:13,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 02:45:13,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-20 02:45:13,650 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-20 02:45:14,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:14,006 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-10-20 02:45:14,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-20 02:45:14,007 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-20 02:45:14,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:14,008 INFO L225 Difference]: With dead ends: 82 [2020-10-20 02:45:14,008 INFO L226 Difference]: Without dead ends: 73 [2020-10-20 02:45:14,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-20 02:45:14,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-20 02:45:14,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-10-20 02:45:14,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-20 02:45:14,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-20 02:45:14,016 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-10-20 02:45:14,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:14,017 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-20 02:45:14,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 02:45:14,018 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-20 02:45:14,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 02:45:14,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:14,018 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:14,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-20 02:45:14,230 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:14,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:14,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 15 times [2020-10-20 02:45:14,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:14,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875895047] [2020-10-20 02:45:14,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:14,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875895047] [2020-10-20 02:45:14,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822939560] [2020-10-20 02:45:14,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-20 02:45:14,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-20 02:45:14,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:14,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 02:45:14,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:14,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:14,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:14,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 02:45:14,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949062747] [2020-10-20 02:45:14,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 02:45:14,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:14,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 02:45:14,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-20 02:45:14,396 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 12 states. [2020-10-20 02:45:14,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:14,694 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-10-20 02:45:14,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 02:45:14,694 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-20 02:45:14,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:14,695 INFO L225 Difference]: With dead ends: 72 [2020-10-20 02:45:14,695 INFO L226 Difference]: Without dead ends: 67 [2020-10-20 02:45:14,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-20 02:45:14,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-20 02:45:14,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-10-20 02:45:14,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-20 02:45:14,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-20 02:45:14,703 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-20 02:45:14,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:14,703 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-20 02:45:14,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 02:45:14,704 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-20 02:45:14,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 02:45:14,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:14,705 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:14,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-20 02:45:14,913 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:14,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:14,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 16 times [2020-10-20 02:45:14,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:14,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121186310] [2020-10-20 02:45:14,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:14,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:15,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121186310] [2020-10-20 02:45:15,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258995530] [2020-10-20 02:45:15,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:15,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 02:45:15,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:15,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 02:45:15,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:15,070 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:15,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:15,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-20 02:45:15,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915902043] [2020-10-20 02:45:15,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 02:45:15,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:15,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 02:45:15,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-20 02:45:15,084 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-20 02:45:15,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:15,256 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-10-20 02:45:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 02:45:15,257 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-20 02:45:15,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:15,258 INFO L225 Difference]: With dead ends: 72 [2020-10-20 02:45:15,258 INFO L226 Difference]: Without dead ends: 66 [2020-10-20 02:45:15,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-10-20 02:45:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-20 02:45:15,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-10-20 02:45:15,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-20 02:45:15,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-20 02:45:15,262 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-10-20 02:45:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:15,263 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-20 02:45:15,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 02:45:15,263 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-20 02:45:15,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 02:45:15,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:15,264 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:15,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-20 02:45:15,472 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:15,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:15,473 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 17 times [2020-10-20 02:45:15,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:15,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420674190] [2020-10-20 02:45:15,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:15,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420674190] [2020-10-20 02:45:15,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713170355] [2020-10-20 02:45:15,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:15,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-20 02:45:15,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:15,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 02:45:15,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:15,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:15,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:15,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-20 02:45:15,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610140464] [2020-10-20 02:45:15,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 02:45:15,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:15,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 02:45:15,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-20 02:45:15,731 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-10-20 02:45:16,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:16,066 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-20 02:45:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-20 02:45:16,067 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-20 02:45:16,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:16,068 INFO L225 Difference]: With dead ends: 83 [2020-10-20 02:45:16,068 INFO L226 Difference]: Without dead ends: 78 [2020-10-20 02:45:16,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-20 02:45:16,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-20 02:45:16,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2020-10-20 02:45:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-20 02:45:16,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-20 02:45:16,072 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 16 [2020-10-20 02:45:16,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:16,072 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-20 02:45:16,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 02:45:16,073 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-20 02:45:16,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 02:45:16,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:16,073 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:16,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:16,283 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:16,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:16,283 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 18 times [2020-10-20 02:45:16,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:16,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460926724] [2020-10-20 02:45:16,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:16,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460926724] [2020-10-20 02:45:16,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598970352] [2020-10-20 02:45:16,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:16,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-20 02:45:16,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:16,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 02:45:16,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:16,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:16,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:16,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-20 02:45:16,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653797604] [2020-10-20 02:45:16,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 02:45:16,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:16,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 02:45:16,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-20 02:45:16,457 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-10-20 02:45:16,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:16,844 INFO L93 Difference]: Finished difference Result 91 states and 215 transitions. [2020-10-20 02:45:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-20 02:45:16,844 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-20 02:45:16,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:16,846 INFO L225 Difference]: With dead ends: 91 [2020-10-20 02:45:16,846 INFO L226 Difference]: Without dead ends: 82 [2020-10-20 02:45:16,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-20 02:45:16,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-20 02:45:16,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-10-20 02:45:16,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-20 02:45:16,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-20 02:45:16,849 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-10-20 02:45:16,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:16,850 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-20 02:45:16,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 02:45:16,850 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-20 02:45:16,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 02:45:16,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:16,851 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:17,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:17,054 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:17,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:17,054 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 19 times [2020-10-20 02:45:17,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:17,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159553163] [2020-10-20 02:45:17,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:17,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:17,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159553163] [2020-10-20 02:45:17,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179870052] [2020-10-20 02:45:17,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:17,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 02:45:17,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:17,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:17,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:17,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-20 02:45:17,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657526] [2020-10-20 02:45:17,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 02:45:17,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:17,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 02:45:17,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-20 02:45:17,269 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-20 02:45:17,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:17,718 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-20 02:45:17,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-20 02:45:17,721 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-20 02:45:17,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:17,722 INFO L225 Difference]: With dead ends: 92 [2020-10-20 02:45:17,722 INFO L226 Difference]: Without dead ends: 83 [2020-10-20 02:45:17,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-20 02:45:17,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-20 02:45:17,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-10-20 02:45:17,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-20 02:45:17,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-20 02:45:17,726 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-10-20 02:45:17,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:17,726 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-20 02:45:17,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 02:45:17,727 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-20 02:45:17,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 02:45:17,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:17,728 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:17,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:17,933 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:17,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:17,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 20 times [2020-10-20 02:45:17,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:17,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272976489] [2020-10-20 02:45:17,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:18,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272976489] [2020-10-20 02:45:18,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780350955] [2020-10-20 02:45:18,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:18,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:18,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:18,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 02:45:18,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:18,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:18,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-20 02:45:18,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883526823] [2020-10-20 02:45:18,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 02:45:18,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:18,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 02:45:18,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-20 02:45:18,098 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 14 states. [2020-10-20 02:45:18,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:18,536 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-10-20 02:45:18,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-20 02:45:18,537 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-20 02:45:18,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:18,538 INFO L225 Difference]: With dead ends: 80 [2020-10-20 02:45:18,538 INFO L226 Difference]: Without dead ends: 75 [2020-10-20 02:45:18,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=734, Unknown=0, NotChecked=0, Total=1056 [2020-10-20 02:45:18,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-20 02:45:18,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-10-20 02:45:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-20 02:45:18,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-20 02:45:18,544 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-20 02:45:18,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:18,544 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-20 02:45:18,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 02:45:18,544 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-20 02:45:18,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 02:45:18,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:18,545 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:18,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-20 02:45:18,746 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:18,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:18,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 21 times [2020-10-20 02:45:18,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:18,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674709712] [2020-10-20 02:45:18,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:18,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674709712] [2020-10-20 02:45:18,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779861387] [2020-10-20 02:45:18,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:18,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-20 02:45:18,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:18,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 02:45:18,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:18,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:19,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:19,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-20 02:45:19,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484240152] [2020-10-20 02:45:19,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 02:45:19,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:19,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 02:45:19,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-20 02:45:19,002 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-20 02:45:19,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:19,223 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-20 02:45:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-20 02:45:19,223 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-20 02:45:19,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:19,224 INFO L225 Difference]: With dead ends: 80 [2020-10-20 02:45:19,225 INFO L226 Difference]: Without dead ends: 74 [2020-10-20 02:45:19,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-10-20 02:45:19,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-20 02:45:19,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-10-20 02:45:19,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-20 02:45:19,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-20 02:45:19,228 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-10-20 02:45:19,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:19,229 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-20 02:45:19,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 02:45:19,229 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-20 02:45:19,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 02:45:19,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:19,230 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:19,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-20 02:45:19,440 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:19,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:19,440 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 22 times [2020-10-20 02:45:19,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:19,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514268887] [2020-10-20 02:45:19,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:19,541 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:19,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514268887] [2020-10-20 02:45:19,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860080738] [2020-10-20 02:45:19,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:19,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 02:45:19,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:19,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 02:45:19,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:19,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:19,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:19,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-20 02:45:19,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26694170] [2020-10-20 02:45:19,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-20 02:45:19,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:19,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 02:45:19,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-20 02:45:19,666 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-10-20 02:45:20,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:20,149 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-20 02:45:20,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-20 02:45:20,150 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-20 02:45:20,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:20,151 INFO L225 Difference]: With dead ends: 93 [2020-10-20 02:45:20,151 INFO L226 Difference]: Without dead ends: 88 [2020-10-20 02:45:20,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-20 02:45:20,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-20 02:45:20,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 53. [2020-10-20 02:45:20,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-20 02:45:20,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-10-20 02:45:20,155 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 18 [2020-10-20 02:45:20,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:20,155 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-10-20 02:45:20,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-20 02:45:20,155 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-10-20 02:45:20,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 02:45:20,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:20,156 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:20,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-20 02:45:20,357 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:20,357 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 23 times [2020-10-20 02:45:20,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:20,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231787573] [2020-10-20 02:45:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:20,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231787573] [2020-10-20 02:45:20,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530433701] [2020-10-20 02:45:20,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:20,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-20 02:45:20,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:20,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 02:45:20,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:20,544 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:20,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:20,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-20 02:45:20,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913155400] [2020-10-20 02:45:20,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-20 02:45:20,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:20,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 02:45:20,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-20 02:45:20,556 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-10-20 02:45:21,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:21,067 INFO L93 Difference]: Finished difference Result 101 states and 239 transitions. [2020-10-20 02:45:21,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-20 02:45:21,068 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-20 02:45:21,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:21,069 INFO L225 Difference]: With dead ends: 101 [2020-10-20 02:45:21,069 INFO L226 Difference]: Without dead ends: 92 [2020-10-20 02:45:21,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-20 02:45:21,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-20 02:45:21,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-20 02:45:21,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-20 02:45:21,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-20 02:45:21,072 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 18 [2020-10-20 02:45:21,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:21,073 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-20 02:45:21,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-20 02:45:21,073 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-20 02:45:21,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 02:45:21,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:21,073 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:21,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-20 02:45:21,281 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:21,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:21,281 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 24 times [2020-10-20 02:45:21,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:21,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781041553] [2020-10-20 02:45:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:21,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781041553] [2020-10-20 02:45:21,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544498465] [2020-10-20 02:45:21,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:21,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-20 02:45:21,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:21,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 02:45:21,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:21,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:21,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-20 02:45:21,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886247753] [2020-10-20 02:45:21,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 02:45:21,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:21,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 02:45:21,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-20 02:45:21,478 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-20 02:45:22,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:22,061 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-10-20 02:45:22,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-20 02:45:22,062 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-20 02:45:22,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:22,063 INFO L225 Difference]: With dead ends: 102 [2020-10-20 02:45:22,063 INFO L226 Difference]: Without dead ends: 93 [2020-10-20 02:45:22,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-10-20 02:45:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-20 02:45:22,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-10-20 02:45:22,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-20 02:45:22,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-10-20 02:45:22,068 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 19 [2020-10-20 02:45:22,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:22,068 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-10-20 02:45:22,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 02:45:22,068 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-10-20 02:45:22,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 02:45:22,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:22,069 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:22,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-20 02:45:22,281 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:22,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:22,281 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 25 times [2020-10-20 02:45:22,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:22,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536333338] [2020-10-20 02:45:22,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:22,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536333338] [2020-10-20 02:45:22,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346571123] [2020-10-20 02:45:22,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:22,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 02:45:22,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:22,521 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:22,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:22,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-20 02:45:22,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018653796] [2020-10-20 02:45:22,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 02:45:22,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:22,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 02:45:22,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-20 02:45:22,540 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 16 states. [2020-10-20 02:45:23,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:23,069 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-10-20 02:45:23,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-20 02:45:23,069 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-20 02:45:23,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:23,070 INFO L225 Difference]: With dead ends: 88 [2020-10-20 02:45:23,070 INFO L226 Difference]: Without dead ends: 83 [2020-10-20 02:45:23,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-20 02:45:23,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-20 02:45:23,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-10-20 02:45:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-20 02:45:23,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-20 02:45:23,075 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-20 02:45:23,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:23,075 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-20 02:45:23,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 02:45:23,076 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-20 02:45:23,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 02:45:23,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:23,077 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:23,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:23,287 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:23,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:23,287 INFO L82 PathProgramCache]: Analyzing trace with hash -923845315, now seen corresponding path program 26 times [2020-10-20 02:45:23,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:23,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090580314] [2020-10-20 02:45:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:23,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090580314] [2020-10-20 02:45:23,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470652579] [2020-10-20 02:45:23,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:23,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:23,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:23,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-20 02:45:23,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:23,510 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:23,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:23,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-20 02:45:23,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667888170] [2020-10-20 02:45:23,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 02:45:23,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:23,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 02:45:23,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-20 02:45:23,533 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-20 02:45:23,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:23,824 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-10-20 02:45:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-20 02:45:23,824 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-20 02:45:23,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:23,825 INFO L225 Difference]: With dead ends: 88 [2020-10-20 02:45:23,825 INFO L226 Difference]: Without dead ends: 82 [2020-10-20 02:45:23,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2020-10-20 02:45:23,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-20 02:45:23,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-10-20 02:45:23,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-20 02:45:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-20 02:45:23,829 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-10-20 02:45:23,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:23,829 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-20 02:45:23,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 02:45:23,829 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-20 02:45:23,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 02:45:23,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:23,830 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:24,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-20 02:45:24,039 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:24,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:24,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1384142351, now seen corresponding path program 27 times [2020-10-20 02:45:24,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:24,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513596069] [2020-10-20 02:45:24,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:24,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513596069] [2020-10-20 02:45:24,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014689535] [2020-10-20 02:45:24,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:24,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-20 02:45:24,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:24,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 02:45:24,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:24,234 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:24,254 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:24,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:24,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-20 02:45:24,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859306146] [2020-10-20 02:45:24,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-20 02:45:24,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:24,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-20 02:45:24,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-20 02:45:24,256 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 17 states. [2020-10-20 02:45:24,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:24,883 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-20 02:45:24,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-20 02:45:24,887 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-20 02:45:24,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:24,888 INFO L225 Difference]: With dead ends: 103 [2020-10-20 02:45:24,888 INFO L226 Difference]: Without dead ends: 98 [2020-10-20 02:45:24,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-20 02:45:24,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-20 02:45:24,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2020-10-20 02:45:24,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-20 02:45:24,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-10-20 02:45:24,894 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 20 [2020-10-20 02:45:24,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:24,895 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-10-20 02:45:24,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-20 02:45:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-10-20 02:45:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 02:45:24,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:24,896 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:25,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-20 02:45:25,104 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:25,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:25,105 INFO L82 PathProgramCache]: Analyzing trace with hash -215934529, now seen corresponding path program 28 times [2020-10-20 02:45:25,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:25,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879196513] [2020-10-20 02:45:25,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:25,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879196513] [2020-10-20 02:45:25,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176256400] [2020-10-20 02:45:25,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:25,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 02:45:25,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:25,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 02:45:25,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:25,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:25,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:25,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-20 02:45:25,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216217951] [2020-10-20 02:45:25,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-20 02:45:25,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:25,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-20 02:45:25,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-20 02:45:25,370 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 17 states. [2020-10-20 02:45:26,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:26,017 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-20 02:45:26,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-20 02:45:26,018 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-20 02:45:26,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:26,019 INFO L225 Difference]: With dead ends: 111 [2020-10-20 02:45:26,019 INFO L226 Difference]: Without dead ends: 102 [2020-10-20 02:45:26,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-10-20 02:45:26,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-20 02:45:26,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2020-10-20 02:45:26,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-20 02:45:26,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-20 02:45:26,036 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 20 [2020-10-20 02:45:26,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:26,037 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-20 02:45:26,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-20 02:45:26,038 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-20 02:45:26,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 02:45:26,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:26,039 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:26,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:26,251 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:26,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:26,252 INFO L82 PathProgramCache]: Analyzing trace with hash -41234864, now seen corresponding path program 29 times [2020-10-20 02:45:26,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:26,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453333705] [2020-10-20 02:45:26,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:26,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453333705] [2020-10-20 02:45:26,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055354218] [2020-10-20 02:45:26,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:26,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-20 02:45:26,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:26,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-20 02:45:26,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:26,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:26,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:26,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-20 02:45:26,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281757904] [2020-10-20 02:45:26,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-20 02:45:26,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:26,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-20 02:45:26,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-20 02:45:26,481 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-20 02:45:27,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:27,180 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-10-20 02:45:27,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-20 02:45:27,181 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-20 02:45:27,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:27,182 INFO L225 Difference]: With dead ends: 112 [2020-10-20 02:45:27,182 INFO L226 Difference]: Without dead ends: 103 [2020-10-20 02:45:27,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-20 02:45:27,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-20 02:45:27,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-10-20 02:45:27,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-20 02:45:27,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-10-20 02:45:27,185 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 21 [2020-10-20 02:45:27,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:27,186 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-10-20 02:45:27,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-20 02:45:27,186 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-10-20 02:45:27,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 02:45:27,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:27,186 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:27,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:27,388 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:27,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:27,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1895992291, now seen corresponding path program 30 times [2020-10-20 02:45:27,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:27,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314390719] [2020-10-20 02:45:27,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:27,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314390719] [2020-10-20 02:45:27,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873925178] [2020-10-20 02:45:27,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:27,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-20 02:45:27,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:27,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-20 02:45:27,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:27,629 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:27,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:27,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-20 02:45:27,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2192931] [2020-10-20 02:45:27,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-20 02:45:27,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:27,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-20 02:45:27,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-20 02:45:27,649 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 18 states. [2020-10-20 02:45:28,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:28,399 INFO L93 Difference]: Finished difference Result 96 states and 233 transitions. [2020-10-20 02:45:28,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-20 02:45:28,399 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-20 02:45:28,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:28,401 INFO L225 Difference]: With dead ends: 96 [2020-10-20 02:45:28,401 INFO L226 Difference]: Without dead ends: 91 [2020-10-20 02:45:28,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-20 02:45:28,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-20 02:45:28,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-10-20 02:45:28,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-20 02:45:28,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-20 02:45:28,405 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-20 02:45:28,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:28,405 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-20 02:45:28,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-20 02:45:28,406 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-20 02:45:28,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 02:45:28,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:28,407 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:28,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-20 02:45:28,616 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:28,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:28,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1242888800, now seen corresponding path program 31 times [2020-10-20 02:45:28,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:28,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830890866] [2020-10-20 02:45:28,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:28,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830890866] [2020-10-20 02:45:28,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707328687] [2020-10-20 02:45:28,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:28,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-20 02:45:28,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:28,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:28,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:28,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-20 02:45:28,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565074845] [2020-10-20 02:45:28,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-20 02:45:28,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:28,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-20 02:45:28,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-20 02:45:28,880 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-20 02:45:29,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:29,221 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-20 02:45:29,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-20 02:45:29,221 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-20 02:45:29,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:29,222 INFO L225 Difference]: With dead ends: 96 [2020-10-20 02:45:29,223 INFO L226 Difference]: Without dead ends: 90 [2020-10-20 02:45:29,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=704, Unknown=0, NotChecked=0, Total=1056 [2020-10-20 02:45:29,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-20 02:45:29,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2020-10-20 02:45:29,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-20 02:45:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-20 02:45:29,227 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-10-20 02:45:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:29,227 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-20 02:45:29,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-20 02:45:29,227 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-20 02:45:29,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 02:45:29,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:29,228 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:29,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:29,438 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:29,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1278252686, now seen corresponding path program 32 times [2020-10-20 02:45:29,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:29,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539342799] [2020-10-20 02:45:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:29,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539342799] [2020-10-20 02:45:29,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825381629] [2020-10-20 02:45:29,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:29,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:29,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:29,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 02:45:29,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:29,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:29,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:29,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-20 02:45:29,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000320471] [2020-10-20 02:45:29,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-20 02:45:29,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:29,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-20 02:45:29,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-20 02:45:29,678 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 19 states. [2020-10-20 02:45:30,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:30,431 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-20 02:45:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-20 02:45:30,432 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-20 02:45:30,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:30,433 INFO L225 Difference]: With dead ends: 113 [2020-10-20 02:45:30,433 INFO L226 Difference]: Without dead ends: 108 [2020-10-20 02:45:30,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-20 02:45:30,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-20 02:45:30,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 61. [2020-10-20 02:45:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-20 02:45:30,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-10-20 02:45:30,438 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 22 [2020-10-20 02:45:30,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:30,438 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-10-20 02:45:30,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-20 02:45:30,438 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-10-20 02:45:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 02:45:30,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:30,439 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:30,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-20 02:45:30,648 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:30,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:30,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1353755908, now seen corresponding path program 33 times [2020-10-20 02:45:30,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:30,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764047394] [2020-10-20 02:45:30,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:30,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764047394] [2020-10-20 02:45:30,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105688373] [2020-10-20 02:45:30,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:30,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-20 02:45:30,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:30,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 02:45:30,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:30,878 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:30,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:30,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-20 02:45:30,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138742615] [2020-10-20 02:45:30,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-20 02:45:30,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:30,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-20 02:45:30,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-20 02:45:30,892 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 19 states. [2020-10-20 02:45:31,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:31,671 INFO L93 Difference]: Finished difference Result 121 states and 287 transitions. [2020-10-20 02:45:31,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-20 02:45:31,672 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-20 02:45:31,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:31,673 INFO L225 Difference]: With dead ends: 121 [2020-10-20 02:45:31,674 INFO L226 Difference]: Without dead ends: 112 [2020-10-20 02:45:31,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-20 02:45:31,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-20 02:45:31,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 77. [2020-10-20 02:45:31,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-20 02:45:31,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-20 02:45:31,680 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 22 [2020-10-20 02:45:31,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:31,680 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-20 02:45:31,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-20 02:45:31,680 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-20 02:45:31,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 02:45:31,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:31,681 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:31,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:31,891 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:31,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:31,891 INFO L82 PathProgramCache]: Analyzing trace with hash -971102387, now seen corresponding path program 34 times [2020-10-20 02:45:31,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:31,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513423210] [2020-10-20 02:45:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:32,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513423210] [2020-10-20 02:45:32,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825662922] [2020-10-20 02:45:32,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:32,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 02:45:32,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:32,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-20 02:45:32,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:32,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:32,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:32,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-20 02:45:32,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950983328] [2020-10-20 02:45:32,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-20 02:45:32,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:32,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-20 02:45:32,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-20 02:45:32,228 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-20 02:45:33,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:33,117 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-10-20 02:45:33,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-20 02:45:33,118 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-20 02:45:33,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:33,119 INFO L225 Difference]: With dead ends: 122 [2020-10-20 02:45:33,119 INFO L226 Difference]: Without dead ends: 113 [2020-10-20 02:45:33,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-20 02:45:33,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-20 02:45:33,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2020-10-20 02:45:33,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-20 02:45:33,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-10-20 02:45:33,124 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 23 [2020-10-20 02:45:33,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:33,124 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-10-20 02:45:33,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-20 02:45:33,124 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-10-20 02:45:33,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 02:45:33,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:33,125 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:33,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-20 02:45:33,325 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:33,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:33,326 INFO L82 PathProgramCache]: Analyzing trace with hash 983267910, now seen corresponding path program 35 times [2020-10-20 02:45:33,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:33,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869465464] [2020-10-20 02:45:33,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:33,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869465464] [2020-10-20 02:45:33,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517335522] [2020-10-20 02:45:33,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:33,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-20 02:45:33,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:33,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-20 02:45:33,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:33,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:33,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:33,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-20 02:45:33,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342057382] [2020-10-20 02:45:33,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-20 02:45:33,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:33,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-20 02:45:33,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-20 02:45:33,630 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 20 states. [2020-10-20 02:45:34,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:34,440 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-10-20 02:45:34,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-20 02:45:34,441 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-20 02:45:34,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:34,442 INFO L225 Difference]: With dead ends: 104 [2020-10-20 02:45:34,442 INFO L226 Difference]: Without dead ends: 99 [2020-10-20 02:45:34,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-20 02:45:34,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-20 02:45:34,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-10-20 02:45:34,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-20 02:45:34,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-20 02:45:34,446 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-20 02:45:34,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:34,446 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-20 02:45:34,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-20 02:45:34,446 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-20 02:45:34,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 02:45:34,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:34,447 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:34,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-20 02:45:34,658 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:34,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:34,658 INFO L82 PathProgramCache]: Analyzing trace with hash 415234755, now seen corresponding path program 36 times [2020-10-20 02:45:34,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:34,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305573334] [2020-10-20 02:45:34,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:34,900 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:34,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305573334] [2020-10-20 02:45:34,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140110316] [2020-10-20 02:45:34,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:34,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-20 02:45:34,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:34,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-20 02:45:34,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:34,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:34,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:34,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-20 02:45:34,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916921786] [2020-10-20 02:45:34,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-20 02:45:34,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:34,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-20 02:45:34,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-20 02:45:34,981 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-20 02:45:35,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:35,376 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-10-20 02:45:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-20 02:45:35,377 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-20 02:45:35,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:35,378 INFO L225 Difference]: With dead ends: 104 [2020-10-20 02:45:35,378 INFO L226 Difference]: Without dead ends: 98 [2020-10-20 02:45:35,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2020-10-20 02:45:35,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-20 02:45:35,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-10-20 02:45:35,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-20 02:45:35,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-20 02:45:35,382 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 24 [2020-10-20 02:45:35,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:35,382 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-20 02:45:35,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-20 02:45:35,382 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-20 02:45:35,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 02:45:35,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:35,383 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:35,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-20 02:45:35,584 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:35,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:35,585 INFO L82 PathProgramCache]: Analyzing trace with hash -39374827, now seen corresponding path program 37 times [2020-10-20 02:45:35,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:35,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344774844] [2020-10-20 02:45:35,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:35,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344774844] [2020-10-20 02:45:35,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578244977] [2020-10-20 02:45:35,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:35,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 02:45:35,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:35,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:35,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:35,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-20 02:45:35,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060794764] [2020-10-20 02:45:35,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-20 02:45:35,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:35,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-20 02:45:35,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-20 02:45:35,875 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 21 states. [2020-10-20 02:45:36,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:36,754 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-20 02:45:36,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-20 02:45:36,755 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-20 02:45:36,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:36,756 INFO L225 Difference]: With dead ends: 123 [2020-10-20 02:45:36,756 INFO L226 Difference]: Without dead ends: 118 [2020-10-20 02:45:36,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-20 02:45:36,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-20 02:45:36,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 65. [2020-10-20 02:45:36,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-20 02:45:36,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-10-20 02:45:36,760 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 24 [2020-10-20 02:45:36,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:36,760 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-10-20 02:45:36,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-20 02:45:36,761 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-10-20 02:45:36,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 02:45:36,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:36,761 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:36,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-20 02:45:36,962 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:36,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:36,962 INFO L82 PathProgramCache]: Analyzing trace with hash 416559353, now seen corresponding path program 38 times [2020-10-20 02:45:36,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:36,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491048617] [2020-10-20 02:45:36,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:37,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491048617] [2020-10-20 02:45:37,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809862922] [2020-10-20 02:45:37,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:37,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:37,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:37,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-20 02:45:37,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:37,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:37,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-20 02:45:37,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989848689] [2020-10-20 02:45:37,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-20 02:45:37,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:37,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-20 02:45:37,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-20 02:45:37,233 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 21 states. [2020-10-20 02:45:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:38,091 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-20 02:45:38,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-20 02:45:38,092 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-20 02:45:38,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:38,093 INFO L225 Difference]: With dead ends: 131 [2020-10-20 02:45:38,093 INFO L226 Difference]: Without dead ends: 122 [2020-10-20 02:45:38,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-10-20 02:45:38,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-20 02:45:38,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 83. [2020-10-20 02:45:38,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-20 02:45:38,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-20 02:45:38,098 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 24 [2020-10-20 02:45:38,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:38,098 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-20 02:45:38,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-20 02:45:38,098 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-20 02:45:38,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 02:45:38,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:38,099 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:38,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-20 02:45:38,308 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:38,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:38,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1220594422, now seen corresponding path program 39 times [2020-10-20 02:45:38,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:38,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903864856] [2020-10-20 02:45:38,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:38,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903864856] [2020-10-20 02:45:38,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788018167] [2020-10-20 02:45:38,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:38,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-20 02:45:38,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:38,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-20 02:45:38,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:38,583 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:38,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:38,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-20 02:45:38,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595735978] [2020-10-20 02:45:38,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-20 02:45:38,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:38,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-20 02:45:38,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-20 02:45:38,608 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-20 02:45:39,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:39,625 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-10-20 02:45:39,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-20 02:45:39,625 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-20 02:45:39,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:39,627 INFO L225 Difference]: With dead ends: 132 [2020-10-20 02:45:39,627 INFO L226 Difference]: Without dead ends: 123 [2020-10-20 02:45:39,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-20 02:45:39,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-20 02:45:39,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 65. [2020-10-20 02:45:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-20 02:45:39,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-10-20 02:45:39,631 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 25 [2020-10-20 02:45:39,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:39,631 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-10-20 02:45:39,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-20 02:45:39,631 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-10-20 02:45:39,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 02:45:39,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:39,632 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:39,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-20 02:45:39,844 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:39,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:39,844 INFO L82 PathProgramCache]: Analyzing trace with hash 28466153, now seen corresponding path program 40 times [2020-10-20 02:45:39,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:39,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238258646] [2020-10-20 02:45:39,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:40,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238258646] [2020-10-20 02:45:40,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764239866] [2020-10-20 02:45:40,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:40,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 02:45:40,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:40,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-20 02:45:40,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:40,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:40,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:40,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-20 02:45:40,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531402576] [2020-10-20 02:45:40,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-20 02:45:40,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:40,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-20 02:45:40,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-20 02:45:40,143 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 22 states. [2020-10-20 02:45:41,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:41,070 INFO L93 Difference]: Finished difference Result 112 states and 273 transitions. [2020-10-20 02:45:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-20 02:45:41,071 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-20 02:45:41,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:41,072 INFO L225 Difference]: With dead ends: 112 [2020-10-20 02:45:41,072 INFO L226 Difference]: Without dead ends: 107 [2020-10-20 02:45:41,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-20 02:45:41,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-20 02:45:41,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-10-20 02:45:41,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-20 02:45:41,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-20 02:45:41,077 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-20 02:45:41,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:41,077 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-20 02:45:41,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-20 02:45:41,077 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-20 02:45:41,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 02:45:41,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:41,078 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:41,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-20 02:45:41,289 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:41,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:41,289 INFO L82 PathProgramCache]: Analyzing trace with hash -391352730, now seen corresponding path program 41 times [2020-10-20 02:45:41,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:41,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012400363] [2020-10-20 02:45:41,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:41,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012400363] [2020-10-20 02:45:41,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389664680] [2020-10-20 02:45:41,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:41,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-20 02:45:41,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:41,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-20 02:45:41,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:41,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:41,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:41,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-20 02:45:41,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935001089] [2020-10-20 02:45:41,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-20 02:45:41,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:41,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-20 02:45:41,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-10-20 02:45:41,654 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-20 02:45:42,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:42,127 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-20 02:45:42,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-20 02:45:42,128 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-20 02:45:42,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:42,129 INFO L225 Difference]: With dead ends: 112 [2020-10-20 02:45:42,130 INFO L226 Difference]: Without dead ends: 106 [2020-10-20 02:45:42,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=540, Invalid=1100, Unknown=0, NotChecked=0, Total=1640 [2020-10-20 02:45:42,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-20 02:45:42,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2020-10-20 02:45:42,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-20 02:45:42,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-10-20 02:45:42,134 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 26 [2020-10-20 02:45:42,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:42,136 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-10-20 02:45:42,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-20 02:45:42,136 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-10-20 02:45:42,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 02:45:42,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:42,136 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:42,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:42,346 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:42,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:42,346 INFO L82 PathProgramCache]: Analyzing trace with hash 816306680, now seen corresponding path program 42 times [2020-10-20 02:45:42,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:42,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710169250] [2020-10-20 02:45:42,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:42,557 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:42,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710169250] [2020-10-20 02:45:42,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548769581] [2020-10-20 02:45:42,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:42,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-20 02:45:42,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:42,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 02:45:42,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:42,645 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:42,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:42,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-20 02:45:42,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620673888] [2020-10-20 02:45:42,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-20 02:45:42,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:42,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-20 02:45:42,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-20 02:45:42,664 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 23 states. [2020-10-20 02:45:43,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:43,801 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-20 02:45:43,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-20 02:45:43,802 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-20 02:45:43,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:43,803 INFO L225 Difference]: With dead ends: 133 [2020-10-20 02:45:43,803 INFO L226 Difference]: Without dead ends: 128 [2020-10-20 02:45:43,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-20 02:45:43,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-20 02:45:43,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 69. [2020-10-20 02:45:43,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-20 02:45:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-10-20 02:45:43,809 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 26 [2020-10-20 02:45:43,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:43,809 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-10-20 02:45:43,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-20 02:45:43,810 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-10-20 02:45:43,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 02:45:43,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:43,810 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:44,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-20 02:45:44,011 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:44,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:44,012 INFO L82 PathProgramCache]: Analyzing trace with hash 882475958, now seen corresponding path program 43 times [2020-10-20 02:45:44,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:44,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103784838] [2020-10-20 02:45:44,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:44,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103784838] [2020-10-20 02:45:44,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400340343] [2020-10-20 02:45:44,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:44,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 02:45:44,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:44,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:44,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:44,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-20 02:45:44,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714557499] [2020-10-20 02:45:44,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-20 02:45:44,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:44,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-20 02:45:44,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-20 02:45:44,382 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 23 states. [2020-10-20 02:45:45,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:45,508 INFO L93 Difference]: Finished difference Result 141 states and 335 transitions. [2020-10-20 02:45:45,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-20 02:45:45,508 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-20 02:45:45,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:45,510 INFO L225 Difference]: With dead ends: 141 [2020-10-20 02:45:45,510 INFO L226 Difference]: Without dead ends: 132 [2020-10-20 02:45:45,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-20 02:45:45,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-20 02:45:45,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 89. [2020-10-20 02:45:45,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-20 02:45:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-20 02:45:45,515 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 26 [2020-10-20 02:45:45,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:45,515 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-20 02:45:45,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-20 02:45:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-20 02:45:45,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 02:45:45,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:45,516 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:45,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:45,723 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:45,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:45,723 INFO L82 PathProgramCache]: Analyzing trace with hash -464271481, now seen corresponding path program 44 times [2020-10-20 02:45:45,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:45,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726112660] [2020-10-20 02:45:45,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:45,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726112660] [2020-10-20 02:45:45,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86392124] [2020-10-20 02:45:45,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:46,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:46,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:46,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-20 02:45:46,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:46,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:46,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:46,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-20 02:45:46,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990808772] [2020-10-20 02:45:46,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-20 02:45:46,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:46,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-20 02:45:46,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-20 02:45:46,052 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-20 02:45:47,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:47,241 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-10-20 02:45:47,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-20 02:45:47,241 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-20 02:45:47,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:47,243 INFO L225 Difference]: With dead ends: 142 [2020-10-20 02:45:47,243 INFO L226 Difference]: Without dead ends: 133 [2020-10-20 02:45:47,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-20 02:45:47,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-20 02:45:47,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 69. [2020-10-20 02:45:47,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-20 02:45:47,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-10-20 02:45:47,247 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 27 [2020-10-20 02:45:47,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:47,248 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-10-20 02:45:47,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-20 02:45:47,248 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-10-20 02:45:47,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 02:45:47,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:47,249 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:47,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-20 02:45:47,461 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:47,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:47,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1586979020, now seen corresponding path program 45 times [2020-10-20 02:45:47,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:47,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580515803] [2020-10-20 02:45:47,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:47,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580515803] [2020-10-20 02:45:47,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337993028] [2020-10-20 02:45:47,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:47,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-20 02:45:47,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:47,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-20 02:45:47,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:47,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:47,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:47,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-20 02:45:47,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112105672] [2020-10-20 02:45:47,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-20 02:45:47,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:47,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-20 02:45:47,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-20 02:45:47,793 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 24 states. [2020-10-20 02:45:48,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:48,943 INFO L93 Difference]: Finished difference Result 120 states and 293 transitions. [2020-10-20 02:45:48,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-20 02:45:48,944 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-20 02:45:48,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:48,945 INFO L225 Difference]: With dead ends: 120 [2020-10-20 02:45:48,945 INFO L226 Difference]: Without dead ends: 115 [2020-10-20 02:45:48,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-20 02:45:48,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-20 02:45:48,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-10-20 02:45:48,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-20 02:45:48,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-20 02:45:48,949 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-20 02:45:48,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:48,949 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-20 02:45:48,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-20 02:45:48,950 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-20 02:45:48,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 02:45:48,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:48,951 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:49,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:49,160 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:49,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:49,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1867154761, now seen corresponding path program 46 times [2020-10-20 02:45:49,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:49,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343014610] [2020-10-20 02:45:49,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:49,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343014610] [2020-10-20 02:45:49,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065914598] [2020-10-20 02:45:49,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:49,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 02:45:49,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:49,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-20 02:45:49,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:49,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:49,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:49,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-20 02:45:49,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999481650] [2020-10-20 02:45:49,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-20 02:45:49,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:49,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-20 02:45:49,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-10-20 02:45:49,568 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-10-20 02:45:50,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:50,112 INFO L93 Difference]: Finished difference Result 120 states and 291 transitions. [2020-10-20 02:45:50,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-20 02:45:50,113 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-20 02:45:50,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:50,114 INFO L225 Difference]: With dead ends: 120 [2020-10-20 02:45:50,114 INFO L226 Difference]: Without dead ends: 114 [2020-10-20 02:45:50,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=649, Invalid=1331, Unknown=0, NotChecked=0, Total=1980 [2020-10-20 02:45:50,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-20 02:45:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2020-10-20 02:45:50,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-20 02:45:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-10-20 02:45:50,118 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 28 [2020-10-20 02:45:50,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:50,118 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-10-20 02:45:50,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-20 02:45:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-10-20 02:45:50,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 02:45:50,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:50,119 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:50,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-20 02:45:50,320 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:50,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:50,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1507485925, now seen corresponding path program 47 times [2020-10-20 02:45:50,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:50,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643643343] [2020-10-20 02:45:50,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:50,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643643343] [2020-10-20 02:45:50,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966487607] [2020-10-20 02:45:50,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:50,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-20 02:45:50,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:50,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-20 02:45:50,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:50,647 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:50,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:50,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-20 02:45:50,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024031504] [2020-10-20 02:45:50,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-20 02:45:50,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:50,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-20 02:45:50,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-20 02:45:50,669 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 25 states. [2020-10-20 02:45:51,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:51,912 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-10-20 02:45:51,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-20 02:45:51,913 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-20 02:45:51,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:51,914 INFO L225 Difference]: With dead ends: 143 [2020-10-20 02:45:51,914 INFO L226 Difference]: Without dead ends: 138 [2020-10-20 02:45:51,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-10-20 02:45:51,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-20 02:45:51,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 73. [2020-10-20 02:45:51,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-20 02:45:51,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 177 transitions. [2020-10-20 02:45:51,918 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 177 transitions. Word has length 28 [2020-10-20 02:45:51,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:51,918 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 177 transitions. [2020-10-20 02:45:51,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-20 02:45:51,919 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 177 transitions. [2020-10-20 02:45:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 02:45:51,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:51,920 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:52,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-20 02:45:52,127 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:52,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:52,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1951734579, now seen corresponding path program 48 times [2020-10-20 02:45:52,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:52,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274216506] [2020-10-20 02:45:52,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:52,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274216506] [2020-10-20 02:45:52,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782554185] [2020-10-20 02:45:52,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:52,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-20 02:45:52,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:52,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-20 02:45:52,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:52,451 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:52,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:52,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-20 02:45:52,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806262382] [2020-10-20 02:45:52,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-20 02:45:52,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:52,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-20 02:45:52,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-10-20 02:45:52,470 INFO L87 Difference]: Start difference. First operand 73 states and 177 transitions. Second operand 25 states. [2020-10-20 02:45:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:53,796 INFO L93 Difference]: Finished difference Result 151 states and 359 transitions. [2020-10-20 02:45:53,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-20 02:45:53,796 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-20 02:45:53,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:53,798 INFO L225 Difference]: With dead ends: 151 [2020-10-20 02:45:53,798 INFO L226 Difference]: Without dead ends: 142 [2020-10-20 02:45:53,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1337, Invalid=2953, Unknown=0, NotChecked=0, Total=4290 [2020-10-20 02:45:53,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-20 02:45:53,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 95. [2020-10-20 02:45:53,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-20 02:45:53,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-10-20 02:45:53,802 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 28 [2020-10-20 02:45:53,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:53,803 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-10-20 02:45:53,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-20 02:45:53,803 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-10-20 02:45:53,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-20 02:45:53,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:53,804 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:54,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-20 02:45:54,014 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:54,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:54,015 INFO L82 PathProgramCache]: Analyzing trace with hash 512601796, now seen corresponding path program 49 times [2020-10-20 02:45:54,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:54,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834194830] [2020-10-20 02:45:54,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 72 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:54,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834194830] [2020-10-20 02:45:54,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965267325] [2020-10-20 02:45:54,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:54,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 02:45:54,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:54,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 02:45:54,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2020-10-20 02:45:54,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340223933] [2020-10-20 02:45:54,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 02:45:54,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:54,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 02:45:54,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-10-20 02:45:54,251 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 13 states. [2020-10-20 02:45:54,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:54,278 INFO L93 Difference]: Finished difference Result 404 states and 979 transitions. [2020-10-20 02:45:54,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 02:45:54,279 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-20 02:45:54,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:54,280 INFO L225 Difference]: With dead ends: 404 [2020-10-20 02:45:54,280 INFO L226 Difference]: Without dead ends: 46 [2020-10-20 02:45:54,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-10-20 02:45:54,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-20 02:45:54,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-20 02:45:54,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-20 02:45:54,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 80 transitions. [2020-10-20 02:45:54,281 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 80 transitions. Word has length 29 [2020-10-20 02:45:54,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:54,282 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 80 transitions. [2020-10-20 02:45:54,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 02:45:54,282 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 80 transitions. [2020-10-20 02:45:54,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-20 02:45:54,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:54,283 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:54,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-20 02:45:54,484 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:54,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:54,485 INFO L82 PathProgramCache]: Analyzing trace with hash 374257903, now seen corresponding path program 50 times [2020-10-20 02:45:54,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:54,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595886707] [2020-10-20 02:45:54,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:54,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595886707] [2020-10-20 02:45:54,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028232101] [2020-10-20 02:45:54,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:54,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:54,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:54,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 02:45:54,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:54,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 02:45:54,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2020-10-20 02:45:54,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32950221] [2020-10-20 02:45:54,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 02:45:54,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:54,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 02:45:54,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-20 02:45:54,652 INFO L87 Difference]: Start difference. First operand 46 states and 80 transitions. Second operand 13 states. [2020-10-20 02:45:54,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:54,674 INFO L93 Difference]: Finished difference Result 151 states and 219 transitions. [2020-10-20 02:45:54,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 02:45:54,675 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-20 02:45:54,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:54,675 INFO L225 Difference]: With dead ends: 151 [2020-10-20 02:45:54,675 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 02:45:54,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-20 02:45:54,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 02:45:54,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 02:45:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 02:45:54,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 02:45:54,677 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-10-20 02:45:54,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:54,677 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 02:45:54,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 02:45:54,677 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 02:45:54,677 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 02:45:54,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:54,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 02:45:54 BasicIcfg [2020-10-20 02:45:54,882 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 02:45:54,883 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 02:45:54,883 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 02:45:54,883 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 02:45:54,884 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 02:45:04" (3/4) ... [2020-10-20 02:45:54,887 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 02:45:54,893 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2020-10-20 02:45:54,894 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2020-10-20 02:45:54,898 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-10-20 02:45:54,898 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 02:45:54,898 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-20 02:45:54,898 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 02:45:54,936 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 02:45:54,936 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 02:45:54,937 INFO L168 Benchmark]: Toolchain (without parser) took 51825.32 ms. Allocated memory was 42.5 MB in the beginning and 146.3 MB in the end (delta: 103.8 MB). Free memory was 20.7 MB in the beginning and 58.9 MB in the end (delta: -38.2 MB). Peak memory consumption was 65.6 MB. Max. memory is 14.3 GB. [2020-10-20 02:45:54,938 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 32.0 MB. Free memory was 11.1 MB in the beginning and 11.0 MB in the end (delta: 47.6 kB). Peak memory consumption was 47.6 kB. Max. memory is 14.3 GB. [2020-10-20 02:45:54,938 INFO L168 Benchmark]: CACSL2BoogieTranslator took 657.41 ms. Allocated memory was 42.5 MB in the beginning and 44.6 MB in the end (delta: 2.1 MB). Free memory was 19.8 MB in the beginning and 17.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 14.3 GB. [2020-10-20 02:45:54,939 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.81 ms. Allocated memory is still 44.6 MB. Free memory was 17.7 MB in the beginning and 15.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 02:45:54,939 INFO L168 Benchmark]: Boogie Preprocessor took 26.54 ms. Allocated memory is still 44.6 MB. Free memory was 15.6 MB in the beginning and 14.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 02:45:54,940 INFO L168 Benchmark]: RCFGBuilder took 452.13 ms. Allocated memory was 44.6 MB in the beginning and 46.1 MB in the end (delta: 1.6 MB). Free memory was 14.0 MB in the beginning and 28.7 MB in the end (delta: -14.7 MB). Peak memory consumption was 3.5 MB. Max. memory is 14.3 GB. [2020-10-20 02:45:54,940 INFO L168 Benchmark]: TraceAbstraction took 50584.35 ms. Allocated memory was 46.1 MB in the beginning and 146.3 MB in the end (delta: 100.1 MB). Free memory was 28.4 MB in the beginning and 63.7 MB in the end (delta: -35.3 MB). Peak memory consumption was 64.8 MB. Max. memory is 14.3 GB. [2020-10-20 02:45:54,941 INFO L168 Benchmark]: Witness Printer took 53.41 ms. Allocated memory is still 146.3 MB. Free memory was 63.7 MB in the beginning and 58.9 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 14.3 GB. [2020-10-20 02:45:54,944 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 32.0 MB. Free memory was 11.1 MB in the beginning and 11.0 MB in the end (delta: 47.6 kB). Peak memory consumption was 47.6 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 657.41 ms. Allocated memory was 42.5 MB in the beginning and 44.6 MB in the end (delta: 2.1 MB). Free memory was 19.8 MB in the beginning and 17.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 42.81 ms. Allocated memory is still 44.6 MB. Free memory was 17.7 MB in the beginning and 15.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 26.54 ms. Allocated memory is still 44.6 MB. Free memory was 15.6 MB in the beginning and 14.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * RCFGBuilder took 452.13 ms. Allocated memory was 44.6 MB in the beginning and 46.1 MB in the end (delta: 1.6 MB). Free memory was 14.0 MB in the beginning and 28.7 MB in the end (delta: -14.7 MB). Peak memory consumption was 3.5 MB. Max. memory is 14.3 GB. * TraceAbstraction took 50584.35 ms. Allocated memory was 46.1 MB in the beginning and 146.3 MB in the end (delta: 100.1 MB). Free memory was 28.4 MB in the beginning and 63.7 MB in the end (delta: -35.3 MB). Peak memory consumption was 64.8 MB. Max. memory is 14.3 GB. * Witness Printer took 53.41 ms. Allocated memory is still 146.3 MB. Free memory was 63.7 MB in the beginning and 58.9 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 785 VarBasedMoverChecksPositive, 19 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.9s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - PositiveResult [Line: 685]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 50.4s, OverallIterations: 52, TraceHistogramMax: 11, AutomataDifference: 26.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 882 SDtfs, 3382 SDslu, 3476 SDs, 0 SdLazy, 4172 SolverSat, 2758 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2520 GetRequests, 822 SyntacticMatches, 36 SemanticMatches, 1662 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17528 ImplicationChecksByTransitivity, 25.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=50, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 52 MinimizatonAttempts, 1294 StatesRemovedByMinimization, 49 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 8.3s InterpolantComputationTime, 1924 NumberOfCodeBlocks, 1924 NumberOfCodeBlocksAsserted, 233 NumberOfCheckSat, 1825 ConstructedInterpolants, 0 QuantifiedInterpolants, 150101 SizeOfPredicates, 531 NumberOfNonLiveVariables, 6486 ConjunctsInSsa, 740 ConjunctsInUnsatCore, 99 InterpolantComputations, 7 PerfectInterpolantSequences, 362/3520 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...