/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 23:37:02,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 23:37:02,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 23:37:02,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 23:37:02,731 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 23:37:02,733 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 23:37:02,735 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 23:37:02,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 23:37:02,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 23:37:02,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 23:37:02,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 23:37:02,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 23:37:02,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 23:37:02,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 23:37:02,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 23:37:02,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 23:37:02,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 23:37:02,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 23:37:02,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 23:37:02,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 23:37:02,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 23:37:02,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 23:37:02,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 23:37:02,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 23:37:02,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-18 23:37:02,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-18 23:37:02,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-18 23:37:02,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-18 23:37:02,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-18 23:37:02,776 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-18 23:37:02,776 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 23:37:02,777 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 23:37:02,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 23:37:02,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 23:37:02,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 23:37:02,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 23:37:02,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 23:37:02,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 23:37:02,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 23:37:02,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 23:37:02,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 23:37:02,790 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2019-12-18 23:37:02,804 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 23:37:02,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 23:37:02,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 23:37:02,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 23:37:02,806 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 23:37:02,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 23:37:02,806 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 23:37:02,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 23:37:02,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 23:37:02,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 23:37:02,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 23:37:02,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 23:37:02,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 23:37:02,808 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 23:37:02,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 23:37:02,808 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 23:37:02,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 23:37:02,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 23:37:02,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 23:37:02,809 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 23:37:02,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 23:37:02,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 23:37:02,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 23:37:02,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 23:37:02,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 23:37:02,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 23:37:02,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 23:37:02,810 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2019-12-18 23:37:02,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 23:37:02,811 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 23:37:03,111 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 23:37:03,129 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 23:37:03,132 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 23:37:03,134 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 23:37:03,134 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 23:37:03,135 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2019-12-18 23:37:03,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f41718808/a3e945122edb42baaaa5440b3c150a30/FLAG559b50cca [2019-12-18 23:37:03,767 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 23:37:03,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2019-12-18 23:37:03,784 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f41718808/a3e945122edb42baaaa5440b3c150a30/FLAG559b50cca [2019-12-18 23:37:04,021 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f41718808/a3e945122edb42baaaa5440b3c150a30 [2019-12-18 23:37:04,033 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 23:37:04,035 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 23:37:04,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 23:37:04,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 23:37:04,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 23:37:04,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:37:04" (1/1) ... [2019-12-18 23:37:04,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f4fc316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:37:04, skipping insertion in model container [2019-12-18 23:37:04,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:37:04" (1/1) ... [2019-12-18 23:37:04,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 23:37:04,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 23:37:04,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 23:37:04,565 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 23:37:04,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 23:37:04,729 INFO L208 MainTranslator]: Completed translation [2019-12-18 23:37:04,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:37:04 WrapperNode [2019-12-18 23:37:04,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 23:37:04,731 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 23:37:04,731 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 23:37:04,731 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 23:37:04,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:37:04" (1/1) ... [2019-12-18 23:37:04,781 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:37:04" (1/1) ... [2019-12-18 23:37:04,808 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 23:37:04,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 23:37:04,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 23:37:04,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 23:37:04,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:37:04" (1/1) ... [2019-12-18 23:37:04,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:37:04" (1/1) ... [2019-12-18 23:37:04,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:37:04" (1/1) ... [2019-12-18 23:37:04,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:37:04" (1/1) ... [2019-12-18 23:37:04,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:37:04" (1/1) ... [2019-12-18 23:37:04,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:37:04" (1/1) ... [2019-12-18 23:37:04,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:37:04" (1/1) ... [2019-12-18 23:37:04,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 23:37:04,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 23:37:04,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 23:37:04,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 23:37:04,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:37:04" (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 [2019-12-18 23:37:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-18 23:37:04,897 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-18 23:37:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-18 23:37:04,897 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-18 23:37:04,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 23:37:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-18 23:37:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 23:37:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 23:37:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-18 23:37:04,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 23:37:04,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 23:37:04,900 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-18 23:37:05,274 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 23:37:05,274 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-18 23:37:05,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:37:05 BoogieIcfgContainer [2019-12-18 23:37:05,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 23:37:05,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 23:37:05,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 23:37:05,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 23:37:05,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 11:37:04" (1/3) ... [2019-12-18 23:37:05,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52fbe214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:37:05, skipping insertion in model container [2019-12-18 23:37:05,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:37:04" (2/3) ... [2019-12-18 23:37:05,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52fbe214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:37:05, skipping insertion in model container [2019-12-18 23:37:05,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:37:05" (3/3) ... [2019-12-18 23:37:05,284 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2019-12-18 23:37:05,293 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 23:37:05,293 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 23:37:05,299 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-18 23:37:05,300 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 23:37:05,331 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,332 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,332 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,332 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,333 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,333 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,333 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,334 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,334 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,334 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,334 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,335 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,335 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,335 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,336 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,336 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,336 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,337 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,337 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,337 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,337 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,338 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,338 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,339 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,339 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,339 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,339 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,340 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,343 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,344 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,344 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,344 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,345 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,345 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,352 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,352 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,352 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,353 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,353 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,353 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:37:05,369 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-18 23:37:05,388 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 23:37:05,389 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 23:37:05,389 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 23:37:05,389 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 23:37:05,389 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 23:37:05,389 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 23:37:05,389 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 23:37:05,390 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 23:37:05,399 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 53 places, 51 transitions [2019-12-18 23:37:05,468 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1013 states. [2019-12-18 23:37:05,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states. [2019-12-18 23:37:05,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-18 23:37:05,479 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:05,480 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:05,481 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:05,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:05,487 INFO L82 PathProgramCache]: Analyzing trace with hash -910010, now seen corresponding path program 1 times [2019-12-18 23:37:05,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:05,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214138685] [2019-12-18 23:37:05,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:05,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214138685] [2019-12-18 23:37:05,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:37:05,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-18 23:37:05,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512823362] [2019-12-18 23:37:05,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 23:37:05,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:05,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 23:37:05,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-18 23:37:05,926 INFO L87 Difference]: Start difference. First operand 1013 states. Second operand 5 states. [2019-12-18 23:37:06,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:06,174 INFO L93 Difference]: Finished difference Result 1778 states and 5126 transitions. [2019-12-18 23:37:06,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 23:37:06,176 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-12-18 23:37:06,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:06,208 INFO L225 Difference]: With dead ends: 1778 [2019-12-18 23:37:06,209 INFO L226 Difference]: Without dead ends: 500 [2019-12-18 23:37:06,212 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-12-18 23:37:06,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2019-12-18 23:37:06,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 388. [2019-12-18 23:37:06,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2019-12-18 23:37:06,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 993 transitions. [2019-12-18 23:37:06,299 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 993 transitions. Word has length 20 [2019-12-18 23:37:06,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:06,300 INFO L462 AbstractCegarLoop]: Abstraction has 388 states and 993 transitions. [2019-12-18 23:37:06,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 23:37:06,300 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 993 transitions. [2019-12-18 23:37:06,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-18 23:37:06,302 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:06,302 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:06,302 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:06,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:06,303 INFO L82 PathProgramCache]: Analyzing trace with hash 723642448, now seen corresponding path program 1 times [2019-12-18 23:37:06,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:06,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941713931] [2019-12-18 23:37:06,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:06,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941713931] [2019-12-18 23:37:06,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:37:06,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-18 23:37:06,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400814621] [2019-12-18 23:37:06,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 23:37:06,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:06,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 23:37:06,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-18 23:37:06,494 INFO L87 Difference]: Start difference. First operand 388 states and 993 transitions. Second operand 5 states. [2019-12-18 23:37:06,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:06,630 INFO L93 Difference]: Finished difference Result 563 states and 1392 transitions. [2019-12-18 23:37:06,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 23:37:06,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-12-18 23:37:06,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:06,635 INFO L225 Difference]: With dead ends: 563 [2019-12-18 23:37:06,636 INFO L226 Difference]: Without dead ends: 354 [2019-12-18 23:37:06,638 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-18 23:37:06,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2019-12-18 23:37:06,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2019-12-18 23:37:06,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2019-12-18 23:37:06,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 883 transitions. [2019-12-18 23:37:06,675 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 883 transitions. Word has length 23 [2019-12-18 23:37:06,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:06,675 INFO L462 AbstractCegarLoop]: Abstraction has 354 states and 883 transitions. [2019-12-18 23:37:06,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 23:37:06,676 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 883 transitions. [2019-12-18 23:37:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-18 23:37:06,678 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:06,678 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:06,678 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:06,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:06,681 INFO L82 PathProgramCache]: Analyzing trace with hash -660572760, now seen corresponding path program 1 times [2019-12-18 23:37:06,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:06,681 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538588443] [2019-12-18 23:37:06,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:06,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:06,807 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538588443] [2019-12-18 23:37:06,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:37:06,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-18 23:37:06,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619467341] [2019-12-18 23:37:06,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 23:37:06,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:06,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 23:37:06,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-18 23:37:06,811 INFO L87 Difference]: Start difference. First operand 354 states and 883 transitions. Second operand 5 states. [2019-12-18 23:37:06,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:06,858 INFO L93 Difference]: Finished difference Result 431 states and 1037 transitions. [2019-12-18 23:37:06,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 23:37:06,859 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-12-18 23:37:06,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:06,861 INFO L225 Difference]: With dead ends: 431 [2019-12-18 23:37:06,862 INFO L226 Difference]: Without dead ends: 301 [2019-12-18 23:37:06,862 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-18 23:37:06,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-12-18 23:37:06,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 288. [2019-12-18 23:37:06,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2019-12-18 23:37:06,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 709 transitions. [2019-12-18 23:37:06,877 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 709 transitions. Word has length 23 [2019-12-18 23:37:06,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:06,878 INFO L462 AbstractCegarLoop]: Abstraction has 288 states and 709 transitions. [2019-12-18 23:37:06,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 23:37:06,878 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 709 transitions. [2019-12-18 23:37:06,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-18 23:37:06,881 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:06,881 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:06,881 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:06,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:06,882 INFO L82 PathProgramCache]: Analyzing trace with hash -962769584, now seen corresponding path program 1 times [2019-12-18 23:37:06,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:06,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78049917] [2019-12-18 23:37:06,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:07,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:07,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78049917] [2019-12-18 23:37:07,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:37:07,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-18 23:37:07,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283767043] [2019-12-18 23:37:07,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-18 23:37:07,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:07,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-18 23:37:07,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-18 23:37:07,038 INFO L87 Difference]: Start difference. First operand 288 states and 709 transitions. Second operand 6 states. [2019-12-18 23:37:07,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:07,161 INFO L93 Difference]: Finished difference Result 448 states and 1078 transitions. [2019-12-18 23:37:07,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 23:37:07,162 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-12-18 23:37:07,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:07,165 INFO L225 Difference]: With dead ends: 448 [2019-12-18 23:37:07,165 INFO L226 Difference]: Without dead ends: 320 [2019-12-18 23:37:07,165 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-18 23:37:07,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-12-18 23:37:07,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-12-18 23:37:07,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-12-18 23:37:07,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 773 transitions. [2019-12-18 23:37:07,179 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 773 transitions. Word has length 26 [2019-12-18 23:37:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:07,180 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 773 transitions. [2019-12-18 23:37:07,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-18 23:37:07,180 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 773 transitions. [2019-12-18 23:37:07,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-18 23:37:07,182 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:07,182 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:07,182 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:07,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:07,183 INFO L82 PathProgramCache]: Analyzing trace with hash -327915495, now seen corresponding path program 1 times [2019-12-18 23:37:07,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:07,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485699818] [2019-12-18 23:37:07,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:07,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485699818] [2019-12-18 23:37:07,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122611047] [2019-12-18 23:37:07,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:07,390 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 23:37:07,400 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:07,494 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:07,496 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:07,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:07,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:07,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-18 23:37:07,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105833673] [2019-12-18 23:37:07,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 23:37:07,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:07,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 23:37:07,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-12-18 23:37:07,514 INFO L87 Difference]: Start difference. First operand 320 states and 773 transitions. Second operand 8 states. [2019-12-18 23:37:07,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:07,636 INFO L93 Difference]: Finished difference Result 467 states and 1116 transitions. [2019-12-18 23:37:07,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 23:37:07,637 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-12-18 23:37:07,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:07,639 INFO L225 Difference]: With dead ends: 467 [2019-12-18 23:37:07,640 INFO L226 Difference]: Without dead ends: 336 [2019-12-18 23:37:07,640 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-18 23:37:07,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2019-12-18 23:37:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 301. [2019-12-18 23:37:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-12-18 23:37:07,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 735 transitions. [2019-12-18 23:37:07,654 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 735 transitions. Word has length 30 [2019-12-18 23:37:07,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:07,655 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 735 transitions. [2019-12-18 23:37:07,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 23:37:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 735 transitions. [2019-12-18 23:37:07,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-18 23:37:07,656 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:07,656 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:07,862 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:07,862 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:07,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:07,863 INFO L82 PathProgramCache]: Analyzing trace with hash -243930643, now seen corresponding path program 1 times [2019-12-18 23:37:07,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:07,863 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959994522] [2019-12-18 23:37:07,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:08,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:08,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959994522] [2019-12-18 23:37:08,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378931939] [2019-12-18 23:37:08,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:08,074 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 23:37:08,078 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:08,122 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:08,125 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:08,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:08,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-18 23:37:08,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092279658] [2019-12-18 23:37:08,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 23:37:08,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:08,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 23:37:08,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-12-18 23:37:08,136 INFO L87 Difference]: Start difference. First operand 301 states and 735 transitions. Second operand 8 states. [2019-12-18 23:37:08,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:08,266 INFO L93 Difference]: Finished difference Result 581 states and 1393 transitions. [2019-12-18 23:37:08,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 23:37:08,267 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-12-18 23:37:08,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:08,272 INFO L225 Difference]: With dead ends: 581 [2019-12-18 23:37:08,272 INFO L226 Difference]: Without dead ends: 368 [2019-12-18 23:37:08,273 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-12-18 23:37:08,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2019-12-18 23:37:08,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 314. [2019-12-18 23:37:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2019-12-18 23:37:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 761 transitions. [2019-12-18 23:37:08,287 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 761 transitions. Word has length 30 [2019-12-18 23:37:08,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:08,287 INFO L462 AbstractCegarLoop]: Abstraction has 314 states and 761 transitions. [2019-12-18 23:37:08,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 23:37:08,287 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 761 transitions. [2019-12-18 23:37:08,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-18 23:37:08,290 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:08,291 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:08,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:08,495 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:08,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:08,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1994322550, now seen corresponding path program 1 times [2019-12-18 23:37:08,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:08,495 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508666042] [2019-12-18 23:37:08,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:08,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508666042] [2019-12-18 23:37:08,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473737590] [2019-12-18 23:37:08,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:08,674 INFO L264 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 23:37:08,679 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:08,702 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:08,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:08,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:08,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-18 23:37:08,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164670327] [2019-12-18 23:37:08,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-18 23:37:08,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:08,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-18 23:37:08,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-12-18 23:37:08,709 INFO L87 Difference]: Start difference. First operand 314 states and 761 transitions. Second operand 9 states. [2019-12-18 23:37:08,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:08,898 INFO L93 Difference]: Finished difference Result 629 states and 1489 transitions. [2019-12-18 23:37:08,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 23:37:08,898 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2019-12-18 23:37:08,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:08,902 INFO L225 Difference]: With dead ends: 629 [2019-12-18 23:37:08,902 INFO L226 Difference]: Without dead ends: 440 [2019-12-18 23:37:08,903 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-12-18 23:37:08,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2019-12-18 23:37:08,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 412. [2019-12-18 23:37:08,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2019-12-18 23:37:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 961 transitions. [2019-12-18 23:37:08,921 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 961 transitions. Word has length 34 [2019-12-18 23:37:08,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:08,921 INFO L462 AbstractCegarLoop]: Abstraction has 412 states and 961 transitions. [2019-12-18 23:37:08,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-18 23:37:08,921 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 961 transitions. [2019-12-18 23:37:08,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-18 23:37:08,922 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:08,922 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:09,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:09,126 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:09,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:09,126 INFO L82 PathProgramCache]: Analyzing trace with hash -40518361, now seen corresponding path program 2 times [2019-12-18 23:37:09,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:09,127 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572240990] [2019-12-18 23:37:09,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:09,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572240990] [2019-12-18 23:37:09,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184457434] [2019-12-18 23:37:09,250 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-12-18 23:37:09,328 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:37:09,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:09,334 INFO L264 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 23:37:09,343 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:09,376 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:09,377 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:09,379 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:09,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:09,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-18 23:37:09,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953056519] [2019-12-18 23:37:09,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 23:37:09,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:09,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 23:37:09,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-12-18 23:37:09,391 INFO L87 Difference]: Start difference. First operand 412 states and 961 transitions. Second operand 10 states. [2019-12-18 23:37:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:09,627 INFO L93 Difference]: Finished difference Result 669 states and 1569 transitions. [2019-12-18 23:37:09,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 23:37:09,628 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2019-12-18 23:37:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:09,631 INFO L225 Difference]: With dead ends: 669 [2019-12-18 23:37:09,631 INFO L226 Difference]: Without dead ends: 432 [2019-12-18 23:37:09,631 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2019-12-18 23:37:09,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2019-12-18 23:37:09,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 346. [2019-12-18 23:37:09,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2019-12-18 23:37:09,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 825 transitions. [2019-12-18 23:37:09,644 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 825 transitions. Word has length 38 [2019-12-18 23:37:09,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:09,644 INFO L462 AbstractCegarLoop]: Abstraction has 346 states and 825 transitions. [2019-12-18 23:37:09,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 23:37:09,644 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 825 transitions. [2019-12-18 23:37:09,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-18 23:37:09,646 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:09,646 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:09,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:09,858 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:09,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:09,859 INFO L82 PathProgramCache]: Analyzing trace with hash 57013188, now seen corresponding path program 3 times [2019-12-18 23:37:09,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:09,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147267190] [2019-12-18 23:37:09,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:09,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147267190] [2019-12-18 23:37:09,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797118340] [2019-12-18 23:37:09,986 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-18 23:37:10,060 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 23:37:10,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:10,061 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:37:10,064 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:10,087 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:10,089 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:10,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:10,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:10,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-18 23:37:10,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450557861] [2019-12-18 23:37:10,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-18 23:37:10,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:10,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-18 23:37:10,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-12-18 23:37:10,100 INFO L87 Difference]: Start difference. First operand 346 states and 825 transitions. Second operand 11 states. [2019-12-18 23:37:10,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:10,331 INFO L93 Difference]: Finished difference Result 677 states and 1585 transitions. [2019-12-18 23:37:10,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 23:37:10,331 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2019-12-18 23:37:10,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:10,335 INFO L225 Difference]: With dead ends: 677 [2019-12-18 23:37:10,335 INFO L226 Difference]: Without dead ends: 464 [2019-12-18 23:37:10,335 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2019-12-18 23:37:10,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2019-12-18 23:37:10,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 365. [2019-12-18 23:37:10,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2019-12-18 23:37:10,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 863 transitions. [2019-12-18 23:37:10,347 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 863 transitions. Word has length 42 [2019-12-18 23:37:10,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:10,348 INFO L462 AbstractCegarLoop]: Abstraction has 365 states and 863 transitions. [2019-12-18 23:37:10,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-18 23:37:10,348 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 863 transitions. [2019-12-18 23:37:10,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-12-18 23:37:10,349 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:10,349 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:10,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:10,556 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:10,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:10,556 INFO L82 PathProgramCache]: Analyzing trace with hash 2041820769, now seen corresponding path program 4 times [2019-12-18 23:37:10,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:10,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809328280] [2019-12-18 23:37:10,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:10,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809328280] [2019-12-18 23:37:10,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254699036] [2019-12-18 23:37:10,690 INFO L92 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 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 [2019-12-18 23:37:10,756 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:37:10,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:10,757 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:37:10,759 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:10,791 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:10,792 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:10,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:10,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-18 23:37:10,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18704452] [2019-12-18 23:37:10,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 23:37:10,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:10,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 23:37:10,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-12-18 23:37:10,798 INFO L87 Difference]: Start difference. First operand 365 states and 863 transitions. Second operand 12 states. [2019-12-18 23:37:11,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:11,002 INFO L93 Difference]: Finished difference Result 709 states and 1649 transitions. [2019-12-18 23:37:11,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 23:37:11,003 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2019-12-18 23:37:11,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:11,006 INFO L225 Difference]: With dead ends: 709 [2019-12-18 23:37:11,006 INFO L226 Difference]: Without dead ends: 496 [2019-12-18 23:37:11,007 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:37:11,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2019-12-18 23:37:11,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 378. [2019-12-18 23:37:11,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2019-12-18 23:37:11,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 889 transitions. [2019-12-18 23:37:11,020 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 889 transitions. Word has length 46 [2019-12-18 23:37:11,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:11,020 INFO L462 AbstractCegarLoop]: Abstraction has 378 states and 889 transitions. [2019-12-18 23:37:11,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 23:37:11,020 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 889 transitions. [2019-12-18 23:37:11,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-12-18 23:37:11,021 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:11,021 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:11,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:11,231 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:11,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:11,232 INFO L82 PathProgramCache]: Analyzing trace with hash 216399870, now seen corresponding path program 5 times [2019-12-18 23:37:11,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:11,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176231105] [2019-12-18 23:37:11,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:11,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176231105] [2019-12-18 23:37:11,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585626218] [2019-12-18 23:37:11,350 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-12-18 23:37:11,411 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 23:37:11,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:11,413 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:37:11,415 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:11,441 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:11,443 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:11,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:11,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-18 23:37:11,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602607453] [2019-12-18 23:37:11,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-18 23:37:11,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:11,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-18 23:37:11,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-12-18 23:37:11,468 INFO L87 Difference]: Start difference. First operand 378 states and 889 transitions. Second operand 13 states. [2019-12-18 23:37:11,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:11,712 INFO L93 Difference]: Finished difference Result 741 states and 1713 transitions. [2019-12-18 23:37:11,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 23:37:11,713 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2019-12-18 23:37:11,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:11,716 INFO L225 Difference]: With dead ends: 741 [2019-12-18 23:37:11,716 INFO L226 Difference]: Without dead ends: 528 [2019-12-18 23:37:11,717 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2019-12-18 23:37:11,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2019-12-18 23:37:11,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 397. [2019-12-18 23:37:11,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2019-12-18 23:37:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 927 transitions. [2019-12-18 23:37:11,730 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 927 transitions. Word has length 50 [2019-12-18 23:37:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:11,730 INFO L462 AbstractCegarLoop]: Abstraction has 397 states and 927 transitions. [2019-12-18 23:37:11,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-18 23:37:11,730 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 927 transitions. [2019-12-18 23:37:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-12-18 23:37:11,731 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:11,731 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:11,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:11,935 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:11,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:11,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1337338469, now seen corresponding path program 6 times [2019-12-18 23:37:11,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:11,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622355739] [2019-12-18 23:37:11,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:12,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622355739] [2019-12-18 23:37:12,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52507893] [2019-12-18 23:37:12,093 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-18 23:37:12,155 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-18 23:37:12,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:12,156 INFO L264 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-18 23:37:12,158 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:12,201 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:12,201 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:12,203 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:12,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:12,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-18 23:37:12,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438149598] [2019-12-18 23:37:12,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 23:37:12,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:12,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 23:37:12,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-12-18 23:37:12,209 INFO L87 Difference]: Start difference. First operand 397 states and 927 transitions. Second operand 14 states. [2019-12-18 23:37:12,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:12,496 INFO L93 Difference]: Finished difference Result 801 states and 1833 transitions. [2019-12-18 23:37:12,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 23:37:12,496 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2019-12-18 23:37:12,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:12,501 INFO L225 Difference]: With dead ends: 801 [2019-12-18 23:37:12,501 INFO L226 Difference]: Without dead ends: 612 [2019-12-18 23:37:12,501 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2019-12-18 23:37:12,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-12-18 23:37:12,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 572. [2019-12-18 23:37:12,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2019-12-18 23:37:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1281 transitions. [2019-12-18 23:37:12,516 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1281 transitions. Word has length 54 [2019-12-18 23:37:12,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:12,516 INFO L462 AbstractCegarLoop]: Abstraction has 572 states and 1281 transitions. [2019-12-18 23:37:12,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 23:37:12,517 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1281 transitions. [2019-12-18 23:37:12,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-12-18 23:37:12,518 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:12,518 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:12,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:12,724 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:12,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:12,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1662726712, now seen corresponding path program 7 times [2019-12-18 23:37:12,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:12,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599750226] [2019-12-18 23:37:12,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:12,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599750226] [2019-12-18 23:37:12,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31534016] [2019-12-18 23:37:12,942 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:12,993 INFO L264 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-18 23:37:12,995 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:13,025 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:13,026 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:13,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:13,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-18 23:37:13,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025963545] [2019-12-18 23:37:13,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-18 23:37:13,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:13,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-18 23:37:13,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-12-18 23:37:13,033 INFO L87 Difference]: Start difference. First operand 572 states and 1281 transitions. Second operand 15 states. [2019-12-18 23:37:13,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:13,337 INFO L93 Difference]: Finished difference Result 829 states and 1889 transitions. [2019-12-18 23:37:13,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 23:37:13,338 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2019-12-18 23:37:13,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:13,341 INFO L225 Difference]: With dead ends: 829 [2019-12-18 23:37:13,342 INFO L226 Difference]: Without dead ends: 616 [2019-12-18 23:37:13,342 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2019-12-18 23:37:13,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-12-18 23:37:13,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 604. [2019-12-18 23:37:13,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2019-12-18 23:37:13,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1345 transitions. [2019-12-18 23:37:13,357 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1345 transitions. Word has length 58 [2019-12-18 23:37:13,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:13,357 INFO L462 AbstractCegarLoop]: Abstraction has 604 states and 1345 transitions. [2019-12-18 23:37:13,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-18 23:37:13,357 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1345 transitions. [2019-12-18 23:37:13,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-12-18 23:37:13,359 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:13,359 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:13,562 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:13,566 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:13,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:13,566 INFO L82 PathProgramCache]: Analyzing trace with hash -774759723, now seen corresponding path program 8 times [2019-12-18 23:37:13,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:13,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045598800] [2019-12-18 23:37:13,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:13,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045598800] [2019-12-18 23:37:13,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146335932] [2019-12-18 23:37:13,730 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-12-18 23:37:13,799 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:37:13,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:13,800 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-18 23:37:13,809 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:13,845 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:13,846 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:13,847 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:13,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:13,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-18 23:37:13,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733127410] [2019-12-18 23:37:13,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 23:37:13,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:13,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 23:37:13,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:37:13,857 INFO L87 Difference]: Start difference. First operand 604 states and 1345 transitions. Second operand 16 states. [2019-12-18 23:37:14,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:14,304 INFO L93 Difference]: Finished difference Result 987 states and 2254 transitions. [2019-12-18 23:37:14,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 23:37:14,305 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2019-12-18 23:37:14,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:14,309 INFO L225 Difference]: With dead ends: 987 [2019-12-18 23:37:14,309 INFO L226 Difference]: Without dead ends: 692 [2019-12-18 23:37:14,310 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=640, Unknown=0, NotChecked=0, Total=870 [2019-12-18 23:37:14,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2019-12-18 23:37:14,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 636. [2019-12-18 23:37:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-12-18 23:37:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1409 transitions. [2019-12-18 23:37:14,326 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1409 transitions. Word has length 62 [2019-12-18 23:37:14,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:14,326 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1409 transitions. [2019-12-18 23:37:14,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 23:37:14,326 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1409 transitions. [2019-12-18 23:37:14,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-12-18 23:37:14,328 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:14,328 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:14,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:14,532 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:14,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:14,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1451259278, now seen corresponding path program 9 times [2019-12-18 23:37:14,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:14,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501043458] [2019-12-18 23:37:14,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:14,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501043458] [2019-12-18 23:37:14,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780533698] [2019-12-18 23:37:14,719 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-18 23:37:14,804 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-18 23:37:14,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:14,806 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-18 23:37:14,808 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:14,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:14,857 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:14,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:14,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-18 23:37:14,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195412052] [2019-12-18 23:37:14,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-18 23:37:14,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:14,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-18 23:37:14,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-12-18 23:37:14,865 INFO L87 Difference]: Start difference. First operand 636 states and 1409 transitions. Second operand 17 states. [2019-12-18 23:37:15,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:15,180 INFO L93 Difference]: Finished difference Result 893 states and 2017 transitions. [2019-12-18 23:37:15,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 23:37:15,180 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2019-12-18 23:37:15,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:15,184 INFO L225 Difference]: With dead ends: 893 [2019-12-18 23:37:15,184 INFO L226 Difference]: Without dead ends: 680 [2019-12-18 23:37:15,185 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2019-12-18 23:37:15,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2019-12-18 23:37:15,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 668. [2019-12-18 23:37:15,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 668 states. [2019-12-18 23:37:15,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1473 transitions. [2019-12-18 23:37:15,200 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1473 transitions. Word has length 66 [2019-12-18 23:37:15,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:15,200 INFO L462 AbstractCegarLoop]: Abstraction has 668 states and 1473 transitions. [2019-12-18 23:37:15,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-18 23:37:15,201 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1473 transitions. [2019-12-18 23:37:15,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-12-18 23:37:15,202 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:15,202 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:15,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:15,407 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:15,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:15,407 INFO L82 PathProgramCache]: Analyzing trace with hash -188316145, now seen corresponding path program 10 times [2019-12-18 23:37:15,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:15,407 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019965437] [2019-12-18 23:37:15,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:15,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019965437] [2019-12-18 23:37:15,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132382241] [2019-12-18 23:37:15,622 INFO L92 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 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 [2019-12-18 23:37:15,697 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:37:15,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:15,699 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-18 23:37:15,700 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:15,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:15,737 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:15,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:15,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-18 23:37:15,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880739370] [2019-12-18 23:37:15,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:37:15,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:15,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:37:15,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:37:15,746 INFO L87 Difference]: Start difference. First operand 668 states and 1473 transitions. Second operand 18 states. [2019-12-18 23:37:16,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:16,147 INFO L93 Difference]: Finished difference Result 1051 states and 2382 transitions. [2019-12-18 23:37:16,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 23:37:16,147 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2019-12-18 23:37:16,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:16,154 INFO L225 Difference]: With dead ends: 1051 [2019-12-18 23:37:16,154 INFO L226 Difference]: Without dead ends: 756 [2019-12-18 23:37:16,155 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 23:37:16,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2019-12-18 23:37:16,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 700. [2019-12-18 23:37:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2019-12-18 23:37:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1537 transitions. [2019-12-18 23:37:16,171 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1537 transitions. Word has length 70 [2019-12-18 23:37:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:16,171 INFO L462 AbstractCegarLoop]: Abstraction has 700 states and 1537 transitions. [2019-12-18 23:37:16,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:37:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1537 transitions. [2019-12-18 23:37:16,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-12-18 23:37:16,173 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:16,173 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:16,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:16,382 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:16,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:16,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1770850476, now seen corresponding path program 11 times [2019-12-18 23:37:16,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:16,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598968841] [2019-12-18 23:37:16,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:16,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598968841] [2019-12-18 23:37:16,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420718293] [2019-12-18 23:37:16,588 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-12-18 23:37:16,659 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-12-18 23:37:16,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:16,660 INFO L264 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-18 23:37:16,662 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:16,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:16,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:16,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:16,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-18 23:37:16,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315964881] [2019-12-18 23:37:16,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-18 23:37:16,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:16,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-18 23:37:16,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-12-18 23:37:16,734 INFO L87 Difference]: Start difference. First operand 700 states and 1537 transitions. Second operand 19 states. [2019-12-18 23:37:17,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:17,129 INFO L93 Difference]: Finished difference Result 973 states and 2177 transitions. [2019-12-18 23:37:17,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 23:37:17,129 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 74 [2019-12-18 23:37:17,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:17,133 INFO L225 Difference]: With dead ends: 973 [2019-12-18 23:37:17,133 INFO L226 Difference]: Without dead ends: 784 [2019-12-18 23:37:17,133 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2019-12-18 23:37:17,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2019-12-18 23:37:17,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 517. [2019-12-18 23:37:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2019-12-18 23:37:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1167 transitions. [2019-12-18 23:37:17,145 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1167 transitions. Word has length 74 [2019-12-18 23:37:17,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:17,145 INFO L462 AbstractCegarLoop]: Abstraction has 517 states and 1167 transitions. [2019-12-18 23:37:17,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-18 23:37:17,146 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1167 transitions. [2019-12-18 23:37:17,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-12-18 23:37:17,147 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:17,147 INFO L411 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:17,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:17,356 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:17,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:17,357 INFO L82 PathProgramCache]: Analyzing trace with hash 362878793, now seen corresponding path program 12 times [2019-12-18 23:37:17,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:17,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051316617] [2019-12-18 23:37:17,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:17,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051316617] [2019-12-18 23:37:17,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970770608] [2019-12-18 23:37:17,568 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-18 23:37:17,635 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-12-18 23:37:17,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:17,636 INFO L264 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-18 23:37:17,638 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:17,687 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:17,688 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:17,688 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:17,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:17,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-18 23:37:17,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051899523] [2019-12-18 23:37:17,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:37:17,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:17,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:37:17,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:37:17,697 INFO L87 Difference]: Start difference. First operand 517 states and 1167 transitions. Second operand 20 states. [2019-12-18 23:37:18,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:18,189 INFO L93 Difference]: Finished difference Result 1111 states and 2502 transitions. [2019-12-18 23:37:18,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 23:37:18,189 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 78 [2019-12-18 23:37:18,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:18,193 INFO L225 Difference]: With dead ends: 1111 [2019-12-18 23:37:18,193 INFO L226 Difference]: Without dead ends: 816 [2019-12-18 23:37:18,194 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=371, Invalid=1035, Unknown=0, NotChecked=0, Total=1406 [2019-12-18 23:37:18,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2019-12-18 23:37:18,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 530. [2019-12-18 23:37:18,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2019-12-18 23:37:18,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1193 transitions. [2019-12-18 23:37:18,206 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1193 transitions. Word has length 78 [2019-12-18 23:37:18,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:18,207 INFO L462 AbstractCegarLoop]: Abstraction has 530 states and 1193 transitions. [2019-12-18 23:37:18,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:37:18,207 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1193 transitions. [2019-12-18 23:37:18,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-12-18 23:37:18,208 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:18,208 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:18,411 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:18,412 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:18,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:18,412 INFO L82 PathProgramCache]: Analyzing trace with hash 314420454, now seen corresponding path program 13 times [2019-12-18 23:37:18,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:18,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126130134] [2019-12-18 23:37:18,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:18,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126130134] [2019-12-18 23:37:18,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936385512] [2019-12-18 23:37:18,647 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:18,708 INFO L264 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-18 23:37:18,709 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:18,733 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:18,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:18,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:18,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-18 23:37:18,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124196046] [2019-12-18 23:37:18,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-18 23:37:18,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:18,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-18 23:37:18,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2019-12-18 23:37:18,743 INFO L87 Difference]: Start difference. First operand 530 states and 1193 transitions. Second operand 21 states. [2019-12-18 23:37:19,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:19,246 INFO L93 Difference]: Finished difference Result 1143 states and 2566 transitions. [2019-12-18 23:37:19,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 23:37:19,246 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 82 [2019-12-18 23:37:19,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:19,250 INFO L225 Difference]: With dead ends: 1143 [2019-12-18 23:37:19,250 INFO L226 Difference]: Without dead ends: 824 [2019-12-18 23:37:19,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=451, Invalid=1109, Unknown=0, NotChecked=0, Total=1560 [2019-12-18 23:37:19,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2019-12-18 23:37:19,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 796. [2019-12-18 23:37:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2019-12-18 23:37:19,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1729 transitions. [2019-12-18 23:37:19,267 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1729 transitions. Word has length 82 [2019-12-18 23:37:19,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:19,267 INFO L462 AbstractCegarLoop]: Abstraction has 796 states and 1729 transitions. [2019-12-18 23:37:19,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-18 23:37:19,267 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1729 transitions. [2019-12-18 23:37:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-12-18 23:37:19,269 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:19,269 INFO L411 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:19,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:19,473 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:19,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:19,473 INFO L82 PathProgramCache]: Analyzing trace with hash 383504003, now seen corresponding path program 14 times [2019-12-18 23:37:19,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:19,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208635454] [2019-12-18 23:37:19,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:19,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208635454] [2019-12-18 23:37:19,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967774630] [2019-12-18 23:37:19,745 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-12-18 23:37:19,815 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:37:19,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:19,817 INFO L264 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-18 23:37:19,819 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:19,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:19,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:19,857 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:19,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:19,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-18 23:37:19,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769479355] [2019-12-18 23:37:19,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:37:19,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:19,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:37:19,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2019-12-18 23:37:19,864 INFO L87 Difference]: Start difference. First operand 796 states and 1729 transitions. Second operand 22 states. [2019-12-18 23:37:20,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:20,411 INFO L93 Difference]: Finished difference Result 1151 states and 2582 transitions. [2019-12-18 23:37:20,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 23:37:20,411 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 86 [2019-12-18 23:37:20,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:20,415 INFO L225 Difference]: With dead ends: 1151 [2019-12-18 23:37:20,416 INFO L226 Difference]: Without dead ends: 832 [2019-12-18 23:37:20,416 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2019-12-18 23:37:20,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2019-12-18 23:37:20,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 538. [2019-12-18 23:37:20,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2019-12-18 23:37:20,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1209 transitions. [2019-12-18 23:37:20,428 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1209 transitions. Word has length 86 [2019-12-18 23:37:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:20,429 INFO L462 AbstractCegarLoop]: Abstraction has 538 states and 1209 transitions. [2019-12-18 23:37:20,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 23:37:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1209 transitions. [2019-12-18 23:37:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-12-18 23:37:20,430 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:20,430 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:20,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:20,634 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:20,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:20,635 INFO L82 PathProgramCache]: Analyzing trace with hash -91523296, now seen corresponding path program 15 times [2019-12-18 23:37:20,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:20,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593137338] [2019-12-18 23:37:20,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:20,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593137338] [2019-12-18 23:37:20,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489019355] [2019-12-18 23:37:20,888 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-18 23:37:20,973 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-12-18 23:37:20,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:20,974 INFO L264 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-18 23:37:20,976 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:21,008 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:21,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:21,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:21,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:21,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-18 23:37:21,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970075501] [2019-12-18 23:37:21,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-18 23:37:21,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:21,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-18 23:37:21,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2019-12-18 23:37:21,020 INFO L87 Difference]: Start difference. First operand 538 states and 1209 transitions. Second operand 23 states. [2019-12-18 23:37:21,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:21,570 INFO L93 Difference]: Finished difference Result 1061 states and 2353 transitions. [2019-12-18 23:37:21,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 23:37:21,570 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 90 [2019-12-18 23:37:21,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:21,575 INFO L225 Difference]: With dead ends: 1061 [2019-12-18 23:37:21,575 INFO L226 Difference]: Without dead ends: 848 [2019-12-18 23:37:21,576 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=486, Invalid=1320, Unknown=0, NotChecked=0, Total=1806 [2019-12-18 23:37:21,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2019-12-18 23:37:21,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 557. [2019-12-18 23:37:21,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 557 states. [2019-12-18 23:37:21,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1247 transitions. [2019-12-18 23:37:21,588 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1247 transitions. Word has length 90 [2019-12-18 23:37:21,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:21,588 INFO L462 AbstractCegarLoop]: Abstraction has 557 states and 1247 transitions. [2019-12-18 23:37:21,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-18 23:37:21,588 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1247 transitions. [2019-12-18 23:37:21,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-12-18 23:37:21,590 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:21,590 INFO L411 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:21,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:21,793 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:21,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:21,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1057969219, now seen corresponding path program 16 times [2019-12-18 23:37:21,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:21,794 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418265072] [2019-12-18 23:37:21,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:22,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418265072] [2019-12-18 23:37:22,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348813855] [2019-12-18 23:37:22,066 INFO L92 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 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 [2019-12-18 23:37:22,153 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:37:22,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:22,156 INFO L264 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-18 23:37:22,158 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:22,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:22,196 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:22,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:22,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-12-18 23:37:22,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790805067] [2019-12-18 23:37:22,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-18 23:37:22,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:22,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-18 23:37:22,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2019-12-18 23:37:22,208 INFO L87 Difference]: Start difference. First operand 557 states and 1247 transitions. Second operand 24 states. [2019-12-18 23:37:22,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:22,857 INFO L93 Difference]: Finished difference Result 1121 states and 2473 transitions. [2019-12-18 23:37:22,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 23:37:22,857 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 94 [2019-12-18 23:37:22,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:22,862 INFO L225 Difference]: With dead ends: 1121 [2019-12-18 23:37:22,862 INFO L226 Difference]: Without dead ends: 932 [2019-12-18 23:37:22,863 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=553, Invalid=1339, Unknown=0, NotChecked=0, Total=1892 [2019-12-18 23:37:22,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2019-12-18 23:37:22,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 892. [2019-12-18 23:37:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2019-12-18 23:37:22,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1921 transitions. [2019-12-18 23:37:22,880 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1921 transitions. Word has length 94 [2019-12-18 23:37:22,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:22,880 INFO L462 AbstractCegarLoop]: Abstraction has 892 states and 1921 transitions. [2019-12-18 23:37:22,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-18 23:37:22,881 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1921 transitions. [2019-12-18 23:37:22,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-12-18 23:37:22,884 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:22,884 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:23,089 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:23,090 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:23,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:23,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1550870362, now seen corresponding path program 17 times [2019-12-18 23:37:23,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:23,091 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841560854] [2019-12-18 23:37:23,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:23,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841560854] [2019-12-18 23:37:23,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928799890] [2019-12-18 23:37:23,365 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-12-18 23:37:23,433 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-12-18 23:37:23,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:23,434 INFO L264 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-18 23:37:23,436 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:23,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:23,470 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:23,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:23,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-12-18 23:37:23,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435534990] [2019-12-18 23:37:23,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-18 23:37:23,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:23,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-18 23:37:23,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2019-12-18 23:37:23,483 INFO L87 Difference]: Start difference. First operand 892 states and 1921 transitions. Second operand 25 states. [2019-12-18 23:37:24,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:24,128 INFO L93 Difference]: Finished difference Result 1149 states and 2529 transitions. [2019-12-18 23:37:24,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-18 23:37:24,129 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 98 [2019-12-18 23:37:24,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:24,135 INFO L225 Difference]: With dead ends: 1149 [2019-12-18 23:37:24,136 INFO L226 Difference]: Without dead ends: 936 [2019-12-18 23:37:24,137 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=647, Invalid=1515, Unknown=0, NotChecked=0, Total=2162 [2019-12-18 23:37:24,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2019-12-18 23:37:24,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 924. [2019-12-18 23:37:24,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 924 states. [2019-12-18 23:37:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1985 transitions. [2019-12-18 23:37:24,181 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1985 transitions. Word has length 98 [2019-12-18 23:37:24,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:24,182 INFO L462 AbstractCegarLoop]: Abstraction has 924 states and 1985 transitions. [2019-12-18 23:37:24,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-18 23:37:24,182 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1985 transitions. [2019-12-18 23:37:24,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-12-18 23:37:24,184 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:24,184 INFO L411 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:24,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:24,389 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:24,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:24,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1034309897, now seen corresponding path program 18 times [2019-12-18 23:37:24,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:24,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096520866] [2019-12-18 23:37:24,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:24,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096520866] [2019-12-18 23:37:24,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624442434] [2019-12-18 23:37:24,663 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-18 23:37:24,741 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-12-18 23:37:24,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:24,743 INFO L264 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-18 23:37:24,744 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:24,779 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:24,780 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:24,781 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:24,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:24,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-12-18 23:37:24,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700633190] [2019-12-18 23:37:24,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-18 23:37:24,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:24,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-18 23:37:24,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2019-12-18 23:37:24,790 INFO L87 Difference]: Start difference. First operand 924 states and 1985 transitions. Second operand 26 states. [2019-12-18 23:37:25,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:25,446 INFO L93 Difference]: Finished difference Result 1279 states and 2838 transitions. [2019-12-18 23:37:25,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-18 23:37:25,447 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 102 [2019-12-18 23:37:25,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:25,452 INFO L225 Difference]: With dead ends: 1279 [2019-12-18 23:37:25,452 INFO L226 Difference]: Without dead ends: 960 [2019-12-18 23:37:25,453 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=650, Invalid=1800, Unknown=0, NotChecked=0, Total=2450 [2019-12-18 23:37:25,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2019-12-18 23:37:25,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 602. [2019-12-18 23:37:25,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2019-12-18 23:37:25,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1337 transitions. [2019-12-18 23:37:25,465 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1337 transitions. Word has length 102 [2019-12-18 23:37:25,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:25,465 INFO L462 AbstractCegarLoop]: Abstraction has 602 states and 1337 transitions. [2019-12-18 23:37:25,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-18 23:37:25,465 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1337 transitions. [2019-12-18 23:37:25,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-12-18 23:37:25,467 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:25,467 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:25,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:25,671 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:25,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:25,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1508277652, now seen corresponding path program 19 times [2019-12-18 23:37:25,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:25,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133011132] [2019-12-18 23:37:25,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:26,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133011132] [2019-12-18 23:37:26,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370221428] [2019-12-18 23:37:26,015 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:26,083 INFO L264 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-18 23:37:26,085 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:26,123 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:26,125 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:26,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:26,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-12-18 23:37:26,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596481721] [2019-12-18 23:37:26,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-18 23:37:26,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:26,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-18 23:37:26,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2019-12-18 23:37:26,134 INFO L87 Difference]: Start difference. First operand 602 states and 1337 transitions. Second operand 27 states. [2019-12-18 23:37:26,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:26,805 INFO L93 Difference]: Finished difference Result 1189 states and 2609 transitions. [2019-12-18 23:37:26,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-18 23:37:26,806 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 106 [2019-12-18 23:37:26,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:26,810 INFO L225 Difference]: With dead ends: 1189 [2019-12-18 23:37:26,810 INFO L226 Difference]: Without dead ends: 976 [2019-12-18 23:37:26,811 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=765, Invalid=1785, Unknown=0, NotChecked=0, Total=2550 [2019-12-18 23:37:26,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2019-12-18 23:37:26,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 621. [2019-12-18 23:37:26,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-12-18 23:37:26,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1375 transitions. [2019-12-18 23:37:26,822 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1375 transitions. Word has length 106 [2019-12-18 23:37:26,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:26,823 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 1375 transitions. [2019-12-18 23:37:26,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-18 23:37:26,823 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1375 transitions. [2019-12-18 23:37:26,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-12-18 23:37:26,825 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:26,825 INFO L411 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:27,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:27,029 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:27,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:27,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1349461967, now seen corresponding path program 20 times [2019-12-18 23:37:27,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:27,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367960419] [2019-12-18 23:37:27,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:27,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367960419] [2019-12-18 23:37:27,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734629744] [2019-12-18 23:37:27,377 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-12-18 23:37:27,465 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:37:27,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:27,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-18 23:37:27,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:27,506 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:27,506 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:27,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:27,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:27,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-12-18 23:37:27,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933938950] [2019-12-18 23:37:27,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-18 23:37:27,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:27,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-18 23:37:27,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2019-12-18 23:37:27,522 INFO L87 Difference]: Start difference. First operand 621 states and 1375 transitions. Second operand 28 states. [2019-12-18 23:37:28,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:28,217 INFO L93 Difference]: Finished difference Result 1221 states and 2673 transitions. [2019-12-18 23:37:28,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-18 23:37:28,218 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 110 [2019-12-18 23:37:28,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:28,222 INFO L225 Difference]: With dead ends: 1221 [2019-12-18 23:37:28,223 INFO L226 Difference]: Without dead ends: 1008 [2019-12-18 23:37:28,224 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=753, Invalid=2003, Unknown=0, NotChecked=0, Total=2756 [2019-12-18 23:37:28,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2019-12-18 23:37:28,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 634. [2019-12-18 23:37:28,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634 states. [2019-12-18 23:37:28,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1401 transitions. [2019-12-18 23:37:28,236 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1401 transitions. Word has length 110 [2019-12-18 23:37:28,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:28,237 INFO L462 AbstractCegarLoop]: Abstraction has 634 states and 1401 transitions. [2019-12-18 23:37:28,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-18 23:37:28,237 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1401 transitions. [2019-12-18 23:37:28,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-12-18 23:37:28,238 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:28,239 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:28,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:28,442 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:28,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:28,443 INFO L82 PathProgramCache]: Analyzing trace with hash -93865522, now seen corresponding path program 21 times [2019-12-18 23:37:28,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:28,444 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798993595] [2019-12-18 23:37:28,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:28,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798993595] [2019-12-18 23:37:28,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023279087] [2019-12-18 23:37:28,847 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-18 23:37:28,921 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-12-18 23:37:28,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:28,923 INFO L264 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-18 23:37:28,925 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:28,959 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:28,960 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:28,960 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:28,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:28,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-12-18 23:37:28,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604893996] [2019-12-18 23:37:28,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-18 23:37:28,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:28,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-18 23:37:28,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2019-12-18 23:37:28,972 INFO L87 Difference]: Start difference. First operand 634 states and 1401 transitions. Second operand 29 states. [2019-12-18 23:37:29,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:29,808 INFO L93 Difference]: Finished difference Result 1253 states and 2737 transitions. [2019-12-18 23:37:29,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-18 23:37:29,809 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 114 [2019-12-18 23:37:29,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:29,815 INFO L225 Difference]: With dead ends: 1253 [2019-12-18 23:37:29,815 INFO L226 Difference]: Without dead ends: 1040 [2019-12-18 23:37:29,816 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=804, Invalid=2166, Unknown=0, NotChecked=0, Total=2970 [2019-12-18 23:37:29,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2019-12-18 23:37:29,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 653. [2019-12-18 23:37:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 653 states. [2019-12-18 23:37:29,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1439 transitions. [2019-12-18 23:37:29,835 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1439 transitions. Word has length 114 [2019-12-18 23:37:29,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:29,836 INFO L462 AbstractCegarLoop]: Abstraction has 653 states and 1439 transitions. [2019-12-18 23:37:29,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-18 23:37:29,836 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1439 transitions. [2019-12-18 23:37:29,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-12-18 23:37:29,838 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:29,838 INFO L411 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:30,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:30,042 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:30,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:30,043 INFO L82 PathProgramCache]: Analyzing trace with hash 51390315, now seen corresponding path program 22 times [2019-12-18 23:37:30,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:30,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886499567] [2019-12-18 23:37:30,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:30,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:30,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886499567] [2019-12-18 23:37:30,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679867586] [2019-12-18 23:37:30,480 INFO L92 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 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 [2019-12-18 23:37:30,548 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:37:30,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:30,550 INFO L264 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-18 23:37:30,552 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:30,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:30,589 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:30,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:30,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-12-18 23:37:30,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006140597] [2019-12-18 23:37:30,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-18 23:37:30,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:30,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-18 23:37:30,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2019-12-18 23:37:30,602 INFO L87 Difference]: Start difference. First operand 653 states and 1439 transitions. Second operand 30 states. [2019-12-18 23:37:31,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:31,396 INFO L93 Difference]: Finished difference Result 1313 states and 2857 transitions. [2019-12-18 23:37:31,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-18 23:37:31,401 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 118 [2019-12-18 23:37:31,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:31,407 INFO L225 Difference]: With dead ends: 1313 [2019-12-18 23:37:31,407 INFO L226 Difference]: Without dead ends: 1124 [2019-12-18 23:37:31,409 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=910, Invalid=2170, Unknown=0, NotChecked=0, Total=3080 [2019-12-18 23:37:31,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2019-12-18 23:37:31,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1084. [2019-12-18 23:37:31,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1084 states. [2019-12-18 23:37:31,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 2305 transitions. [2019-12-18 23:37:31,425 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 2305 transitions. Word has length 118 [2019-12-18 23:37:31,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:31,426 INFO L462 AbstractCegarLoop]: Abstraction has 1084 states and 2305 transitions. [2019-12-18 23:37:31,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-18 23:37:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 2305 transitions. [2019-12-18 23:37:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-12-18 23:37:31,429 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:31,429 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:31,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:31,633 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:31,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:31,633 INFO L82 PathProgramCache]: Analyzing trace with hash 728636424, now seen corresponding path program 23 times [2019-12-18 23:37:31,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:31,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717391223] [2019-12-18 23:37:31,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:32,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717391223] [2019-12-18 23:37:32,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999803302] [2019-12-18 23:37:32,210 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-12-18 23:37:32,287 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-12-18 23:37:32,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:32,289 INFO L264 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-18 23:37:32,292 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:32,323 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:32,324 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:32,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:32,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-12-18 23:37:32,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234491684] [2019-12-18 23:37:32,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-18 23:37:32,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:32,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-18 23:37:32,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2019-12-18 23:37:32,343 INFO L87 Difference]: Start difference. First operand 1084 states and 2305 transitions. Second operand 31 states. [2019-12-18 23:37:33,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:33,231 INFO L93 Difference]: Finished difference Result 1341 states and 2913 transitions. [2019-12-18 23:37:33,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-18 23:37:33,231 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 122 [2019-12-18 23:37:33,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:33,239 INFO L225 Difference]: With dead ends: 1341 [2019-12-18 23:37:33,239 INFO L226 Difference]: Without dead ends: 1128 [2019-12-18 23:37:33,242 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1031, Invalid=2391, Unknown=0, NotChecked=0, Total=3422 [2019-12-18 23:37:33,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2019-12-18 23:37:33,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1116. [2019-12-18 23:37:33,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1116 states. [2019-12-18 23:37:33,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 2369 transitions. [2019-12-18 23:37:33,257 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 2369 transitions. Word has length 122 [2019-12-18 23:37:33,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:33,257 INFO L462 AbstractCegarLoop]: Abstraction has 1116 states and 2369 transitions. [2019-12-18 23:37:33,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-18 23:37:33,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 2369 transitions. [2019-12-18 23:37:33,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-12-18 23:37:33,260 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:33,260 INFO L411 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:33,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:33,463 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:33,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:33,464 INFO L82 PathProgramCache]: Analyzing trace with hash 491887781, now seen corresponding path program 24 times [2019-12-18 23:37:33,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:33,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528957699] [2019-12-18 23:37:33,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:34,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528957699] [2019-12-18 23:37:34,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93541799] [2019-12-18 23:37:34,073 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-18 23:37:34,163 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-12-18 23:37:34,163 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:34,165 INFO L264 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-18 23:37:34,167 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:34,201 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:34,201 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:34,202 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:34,218 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:34,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:34,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-12-18 23:37:34,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755635544] [2019-12-18 23:37:34,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-18 23:37:34,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:34,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-18 23:37:34,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2019-12-18 23:37:34,221 INFO L87 Difference]: Start difference. First operand 1116 states and 2369 transitions. Second operand 32 states. [2019-12-18 23:37:35,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:35,202 INFO L93 Difference]: Finished difference Result 1499 states and 3278 transitions. [2019-12-18 23:37:35,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-18 23:37:35,202 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2019-12-18 23:37:35,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:35,206 INFO L225 Difference]: With dead ends: 1499 [2019-12-18 23:37:35,206 INFO L226 Difference]: Without dead ends: 1204 [2019-12-18 23:37:35,207 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1010, Invalid=2772, Unknown=0, NotChecked=0, Total=3782 [2019-12-18 23:37:35,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2019-12-18 23:37:35,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1148. [2019-12-18 23:37:35,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1148 states. [2019-12-18 23:37:35,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 2433 transitions. [2019-12-18 23:37:35,223 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 2433 transitions. Word has length 126 [2019-12-18 23:37:35,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:35,224 INFO L462 AbstractCegarLoop]: Abstraction has 1148 states and 2433 transitions. [2019-12-18 23:37:35,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-18 23:37:35,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 2433 transitions. [2019-12-18 23:37:35,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-12-18 23:37:35,225 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:35,225 INFO L411 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:35,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:35,426 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:35,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:35,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1066163134, now seen corresponding path program 25 times [2019-12-18 23:37:35,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:35,427 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77308044] [2019-12-18 23:37:35,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:35,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77308044] [2019-12-18 23:37:35,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308711697] [2019-12-18 23:37:35,965 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:36,047 INFO L264 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-18 23:37:36,049 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:36,117 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:36,118 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:36,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:36,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-12-18 23:37:36,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608112604] [2019-12-18 23:37:36,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-18 23:37:36,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:36,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-18 23:37:36,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2019-12-18 23:37:36,148 INFO L87 Difference]: Start difference. First operand 1148 states and 2433 transitions. Second operand 33 states. [2019-12-18 23:37:37,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:37,230 INFO L93 Difference]: Finished difference Result 1405 states and 3041 transitions. [2019-12-18 23:37:37,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-18 23:37:37,231 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 130 [2019-12-18 23:37:37,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:37,235 INFO L225 Difference]: With dead ends: 1405 [2019-12-18 23:37:37,235 INFO L226 Difference]: Without dead ends: 1192 [2019-12-18 23:37:37,236 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1179, Invalid=2727, Unknown=0, NotChecked=0, Total=3906 [2019-12-18 23:37:37,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2019-12-18 23:37:37,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1180. [2019-12-18 23:37:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1180 states. [2019-12-18 23:37:37,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 2497 transitions. [2019-12-18 23:37:37,248 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 2497 transitions. Word has length 130 [2019-12-18 23:37:37,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:37,249 INFO L462 AbstractCegarLoop]: Abstraction has 1180 states and 2497 transitions. [2019-12-18 23:37:37,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-18 23:37:37,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 2497 transitions. [2019-12-18 23:37:37,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-12-18 23:37:37,250 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:37,250 INFO L411 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:37,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:37,453 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:37,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:37,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1154430943, now seen corresponding path program 26 times [2019-12-18 23:37:37,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:37,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853244284] [2019-12-18 23:37:37,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:38,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853244284] [2019-12-18 23:37:38,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511569106] [2019-12-18 23:37:38,035 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-12-18 23:37:38,109 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:37:38,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:38,110 INFO L264 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-18 23:37:38,112 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:38,141 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:38,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:38,143 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:38,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:38,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-12-18 23:37:38,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774545462] [2019-12-18 23:37:38,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-18 23:37:38,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:38,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-18 23:37:38,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 23:37:38,158 INFO L87 Difference]: Start difference. First operand 1180 states and 2497 transitions. Second operand 34 states. [2019-12-18 23:37:39,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:39,212 INFO L93 Difference]: Finished difference Result 1563 states and 3406 transitions. [2019-12-18 23:37:39,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-18 23:37:39,213 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 134 [2019-12-18 23:37:39,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:39,215 INFO L225 Difference]: With dead ends: 1563 [2019-12-18 23:37:39,215 INFO L226 Difference]: Without dead ends: 1268 [2019-12-18 23:37:39,216 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1148, Invalid=3142, Unknown=0, NotChecked=0, Total=4290 [2019-12-18 23:37:39,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2019-12-18 23:37:39,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 1212. [2019-12-18 23:37:39,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1212 states. [2019-12-18 23:37:39,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 2561 transitions. [2019-12-18 23:37:39,231 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 2561 transitions. Word has length 134 [2019-12-18 23:37:39,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:39,232 INFO L462 AbstractCegarLoop]: Abstraction has 1212 states and 2561 transitions. [2019-12-18 23:37:39,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-18 23:37:39,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 2561 transitions. [2019-12-18 23:37:39,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-12-18 23:37:39,234 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:39,234 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:39,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:39,438 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:39,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:39,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1928483452, now seen corresponding path program 27 times [2019-12-18 23:37:39,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:39,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269857911] [2019-12-18 23:37:39,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:39,949 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269857911] [2019-12-18 23:37:39,949 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959514754] [2019-12-18 23:37:39,949 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-18 23:37:40,036 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-12-18 23:37:40,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:40,038 INFO L264 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 37 conjunts are in the unsatisfiable core [2019-12-18 23:37:40,040 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:40,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:40,091 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:40,091 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:40,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:40,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-12-18 23:37:40,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770477907] [2019-12-18 23:37:40,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-18 23:37:40,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:40,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-18 23:37:40,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2019-12-18 23:37:40,112 INFO L87 Difference]: Start difference. First operand 1212 states and 2561 transitions. Second operand 35 states. [2019-12-18 23:37:41,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:41,202 INFO L93 Difference]: Finished difference Result 1485 states and 3201 transitions. [2019-12-18 23:37:41,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-18 23:37:41,203 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 138 [2019-12-18 23:37:41,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:41,206 INFO L225 Difference]: With dead ends: 1485 [2019-12-18 23:37:41,206 INFO L226 Difference]: Without dead ends: 1296 [2019-12-18 23:37:41,207 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1203, Invalid=3219, Unknown=0, NotChecked=0, Total=4422 [2019-12-18 23:37:41,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2019-12-18 23:37:41,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 773. [2019-12-18 23:37:41,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 773 states. [2019-12-18 23:37:41,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1679 transitions. [2019-12-18 23:37:41,226 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1679 transitions. Word has length 138 [2019-12-18 23:37:41,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:41,226 INFO L462 AbstractCegarLoop]: Abstraction has 773 states and 1679 transitions. [2019-12-18 23:37:41,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-18 23:37:41,226 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1679 transitions. [2019-12-18 23:37:41,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-12-18 23:37:41,228 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:41,228 INFO L411 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:41,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:41,432 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:41,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:41,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1509754599, now seen corresponding path program 28 times [2019-12-18 23:37:41,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:41,433 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296668645] [2019-12-18 23:37:41,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:41,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296668645] [2019-12-18 23:37:41,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69392460] [2019-12-18 23:37:41,899 INFO L92 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 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 [2019-12-18 23:37:41,970 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:37:41,970 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:41,972 INFO L264 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 37 conjunts are in the unsatisfiable core [2019-12-18 23:37:41,974 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:42,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:42,012 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:42,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:42,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-12-18 23:37:42,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845052897] [2019-12-18 23:37:42,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-18 23:37:42,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:42,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-18 23:37:42,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=964, Unknown=0, NotChecked=0, Total=1260 [2019-12-18 23:37:42,032 INFO L87 Difference]: Start difference. First operand 773 states and 1679 transitions. Second operand 36 states. [2019-12-18 23:37:43,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:43,158 INFO L93 Difference]: Finished difference Result 1623 states and 3526 transitions. [2019-12-18 23:37:43,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-18 23:37:43,158 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 142 [2019-12-18 23:37:43,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:43,161 INFO L225 Difference]: With dead ends: 1623 [2019-12-18 23:37:43,162 INFO L226 Difference]: Without dead ends: 1280 [2019-12-18 23:37:43,162 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1367, Invalid=3325, Unknown=0, NotChecked=0, Total=4692 [2019-12-18 23:37:43,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2019-12-18 23:37:43,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 762. [2019-12-18 23:37:43,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 762 states. [2019-12-18 23:37:43,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1657 transitions. [2019-12-18 23:37:43,178 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1657 transitions. Word has length 142 [2019-12-18 23:37:43,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:43,178 INFO L462 AbstractCegarLoop]: Abstraction has 762 states and 1657 transitions. [2019-12-18 23:37:43,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-18 23:37:43,178 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1657 transitions. [2019-12-18 23:37:43,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-12-18 23:37:43,180 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:43,180 INFO L411 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:43,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:43,384 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:43,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:43,385 INFO L82 PathProgramCache]: Analyzing trace with hash -496752970, now seen corresponding path program 29 times [2019-12-18 23:37:43,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:43,385 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800673852] [2019-12-18 23:37:43,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:44,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800673852] [2019-12-18 23:37:44,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187801326] [2019-12-18 23:37:44,160 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-12-18 23:37:44,242 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-12-18 23:37:44,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:44,244 INFO L264 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-18 23:37:44,246 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:44,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:44,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:44,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:44,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-12-18 23:37:44,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034506198] [2019-12-18 23:37:44,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-18 23:37:44,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:44,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-18 23:37:44,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2019-12-18 23:37:44,292 INFO L87 Difference]: Start difference. First operand 762 states and 1657 transitions. Second operand 37 states. [2019-12-18 23:37:45,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:45,412 INFO L93 Difference]: Finished difference Result 1509 states and 3249 transitions. [2019-12-18 23:37:45,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-18 23:37:45,413 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 146 [2019-12-18 23:37:45,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:45,416 INFO L225 Difference]: With dead ends: 1509 [2019-12-18 23:37:45,416 INFO L226 Difference]: Without dead ends: 1296 [2019-12-18 23:37:45,417 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1505, Invalid=3465, Unknown=0, NotChecked=0, Total=4970 [2019-12-18 23:37:45,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2019-12-18 23:37:45,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 781. [2019-12-18 23:37:45,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 781 states. [2019-12-18 23:37:45,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1695 transitions. [2019-12-18 23:37:45,432 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1695 transitions. Word has length 146 [2019-12-18 23:37:45,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:45,432 INFO L462 AbstractCegarLoop]: Abstraction has 781 states and 1695 transitions. [2019-12-18 23:37:45,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-18 23:37:45,433 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1695 transitions. [2019-12-18 23:37:45,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-12-18 23:37:45,434 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:45,434 INFO L411 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:45,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:45,638 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:45,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:45,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1399251027, now seen corresponding path program 30 times [2019-12-18 23:37:45,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:45,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520793875] [2019-12-18 23:37:45,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:46,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520793875] [2019-12-18 23:37:46,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47473884] [2019-12-18 23:37:46,143 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-18 23:37:46,229 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-12-18 23:37:46,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:46,231 INFO L264 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-18 23:37:46,234 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:46,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:46,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:46,285 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:46,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:46,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-12-18 23:37:46,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449923815] [2019-12-18 23:37:46,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-18 23:37:46,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:46,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-18 23:37:46,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2019-12-18 23:37:46,307 INFO L87 Difference]: Start difference. First operand 781 states and 1695 transitions. Second operand 38 states. [2019-12-18 23:37:47,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:47,411 INFO L93 Difference]: Finished difference Result 1541 states and 3313 transitions. [2019-12-18 23:37:47,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-18 23:37:47,414 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 150 [2019-12-18 23:37:47,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:47,416 INFO L225 Difference]: With dead ends: 1541 [2019-12-18 23:37:47,417 INFO L226 Difference]: Without dead ends: 1328 [2019-12-18 23:37:47,417 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1443, Invalid=3813, Unknown=0, NotChecked=0, Total=5256 [2019-12-18 23:37:47,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2019-12-18 23:37:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 794. [2019-12-18 23:37:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2019-12-18 23:37:47,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1721 transitions. [2019-12-18 23:37:47,432 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1721 transitions. Word has length 150 [2019-12-18 23:37:47,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:47,433 INFO L462 AbstractCegarLoop]: Abstraction has 794 states and 1721 transitions. [2019-12-18 23:37:47,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-18 23:37:47,433 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1721 transitions. [2019-12-18 23:37:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-12-18 23:37:47,434 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:47,434 INFO L411 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:47,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:47,638 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:47,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:47,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1807539984, now seen corresponding path program 31 times [2019-12-18 23:37:47,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:47,639 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156054231] [2019-12-18 23:37:47,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:48,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156054231] [2019-12-18 23:37:48,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870859483] [2019-12-18 23:37:48,314 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-12-18 23:37:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:48,399 INFO L264 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-18 23:37:48,402 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:48,438 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:48,439 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:48,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:48,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-12-18 23:37:48,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280392460] [2019-12-18 23:37:48,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-12-18 23:37:48,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:48,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-12-18 23:37:48,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1133, Unknown=0, NotChecked=0, Total=1482 [2019-12-18 23:37:48,459 INFO L87 Difference]: Start difference. First operand 794 states and 1721 transitions. Second operand 39 states. [2019-12-18 23:37:50,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:50,084 INFO L93 Difference]: Finished difference Result 1573 states and 3377 transitions. [2019-12-18 23:37:50,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-18 23:37:50,085 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 154 [2019-12-18 23:37:50,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:50,089 INFO L225 Difference]: With dead ends: 1573 [2019-12-18 23:37:50,089 INFO L226 Difference]: Without dead ends: 1360 [2019-12-18 23:37:50,090 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1683, Invalid=3867, Unknown=0, NotChecked=0, Total=5550 [2019-12-18 23:37:50,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2019-12-18 23:37:50,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 813. [2019-12-18 23:37:50,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 813 states. [2019-12-18 23:37:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1759 transitions. [2019-12-18 23:37:50,106 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1759 transitions. Word has length 154 [2019-12-18 23:37:50,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:50,107 INFO L462 AbstractCegarLoop]: Abstraction has 813 states and 1759 transitions. [2019-12-18 23:37:50,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-12-18 23:37:50,107 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1759 transitions. [2019-12-18 23:37:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-12-18 23:37:50,108 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:50,108 INFO L411 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:50,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:50,312 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:50,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:50,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1165290893, now seen corresponding path program 32 times [2019-12-18 23:37:50,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:50,312 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831877435] [2019-12-18 23:37:50,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:51,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831877435] [2019-12-18 23:37:51,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642434844] [2019-12-18 23:37:51,064 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-12-18 23:37:51,150 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:37:51,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:51,152 INFO L264 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-18 23:37:51,155 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:51,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:51,185 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:51,185 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:51,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:51,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-12-18 23:37:51,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100716092] [2019-12-18 23:37:51,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-18 23:37:51,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:51,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-18 23:37:51,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2019-12-18 23:37:51,205 INFO L87 Difference]: Start difference. First operand 813 states and 1759 transitions. Second operand 40 states. [2019-12-18 23:37:52,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:52,450 INFO L93 Difference]: Finished difference Result 1633 states and 3497 transitions. [2019-12-18 23:37:52,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-18 23:37:52,450 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 158 [2019-12-18 23:37:52,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:52,452 INFO L225 Difference]: With dead ends: 1633 [2019-12-18 23:37:52,452 INFO L226 Difference]: Without dead ends: 1444 [2019-12-18 23:37:52,453 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1608, Invalid=4244, Unknown=0, NotChecked=0, Total=5852 [2019-12-18 23:37:52,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2019-12-18 23:37:52,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1404. [2019-12-18 23:37:52,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1404 states. [2019-12-18 23:37:52,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 2945 transitions. [2019-12-18 23:37:52,473 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 2945 transitions. Word has length 158 [2019-12-18 23:37:52,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:52,473 INFO L462 AbstractCegarLoop]: Abstraction has 1404 states and 2945 transitions. [2019-12-18 23:37:52,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-18 23:37:52,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 2945 transitions. [2019-12-18 23:37:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-12-18 23:37:52,475 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:52,475 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:52,679 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:52,680 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:52,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:52,680 INFO L82 PathProgramCache]: Analyzing trace with hash -200720086, now seen corresponding path program 33 times [2019-12-18 23:37:52,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:52,681 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845751343] [2019-12-18 23:37:52,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:53,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845751343] [2019-12-18 23:37:53,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525578572] [2019-12-18 23:37:53,412 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-18 23:37:53,504 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-12-18 23:37:53,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:53,509 INFO L264 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-18 23:37:53,522 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:53,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:53,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:53,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:53,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:53,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-12-18 23:37:53,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004356356] [2019-12-18 23:37:53,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-12-18 23:37:53,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:53,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-12-18 23:37:53,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1253, Unknown=0, NotChecked=0, Total=1640 [2019-12-18 23:37:53,601 INFO L87 Difference]: Start difference. First operand 1404 states and 2945 transitions. Second operand 41 states. [2019-12-18 23:37:54,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:54,813 INFO L93 Difference]: Finished difference Result 1661 states and 3553 transitions. [2019-12-18 23:37:54,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-18 23:37:54,814 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 162 [2019-12-18 23:37:54,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:54,816 INFO L225 Difference]: With dead ends: 1661 [2019-12-18 23:37:54,816 INFO L226 Difference]: Without dead ends: 1448 [2019-12-18 23:37:54,818 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1683, Invalid=4479, Unknown=0, NotChecked=0, Total=6162 [2019-12-18 23:37:54,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2019-12-18 23:37:54,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1436. [2019-12-18 23:37:54,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2019-12-18 23:37:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 3009 transitions. [2019-12-18 23:37:54,835 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 3009 transitions. Word has length 162 [2019-12-18 23:37:54,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:54,836 INFO L462 AbstractCegarLoop]: Abstraction has 1436 states and 3009 transitions. [2019-12-18 23:37:54,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-12-18 23:37:54,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 3009 transitions. [2019-12-18 23:37:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-12-18 23:37:54,837 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:54,838 INFO L411 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:55,038 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:55,038 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:55,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:55,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1520902343, now seen corresponding path program 34 times [2019-12-18 23:37:55,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:55,040 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047211402] [2019-12-18 23:37:55,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:55,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047211402] [2019-12-18 23:37:55,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40784389] [2019-12-18 23:37:55,655 INFO L92 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 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 [2019-12-18 23:37:55,734 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:37:55,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:55,736 INFO L264 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-18 23:37:55,738 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:55,790 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:55,791 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:55,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:55,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:55,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-12-18 23:37:55,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099733566] [2019-12-18 23:37:55,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-12-18 23:37:55,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:55,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-12-18 23:37:55,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1315, Unknown=0, NotChecked=0, Total=1722 [2019-12-18 23:37:55,820 INFO L87 Difference]: Start difference. First operand 1436 states and 3009 transitions. Second operand 42 states. [2019-12-18 23:37:57,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:57,235 INFO L93 Difference]: Finished difference Result 1819 states and 3918 transitions. [2019-12-18 23:37:57,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-18 23:37:57,235 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 166 [2019-12-18 23:37:57,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:57,237 INFO L225 Difference]: With dead ends: 1819 [2019-12-18 23:37:57,237 INFO L226 Difference]: Without dead ends: 1524 [2019-12-18 23:37:57,238 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1904, Invalid=4576, Unknown=0, NotChecked=0, Total=6480 [2019-12-18 23:37:57,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2019-12-18 23:37:57,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1468. [2019-12-18 23:37:57,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1468 states. [2019-12-18 23:37:57,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 3073 transitions. [2019-12-18 23:37:57,258 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 3073 transitions. Word has length 166 [2019-12-18 23:37:57,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:57,258 INFO L462 AbstractCegarLoop]: Abstraction has 1468 states and 3073 transitions. [2019-12-18 23:37:57,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-12-18 23:37:57,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 3073 transitions. [2019-12-18 23:37:57,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-12-18 23:37:57,261 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:57,261 INFO L411 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:57,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:57,465 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:57,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:57,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1395689316, now seen corresponding path program 35 times [2019-12-18 23:37:57,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:57,466 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945622717] [2019-12-18 23:37:57,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:37:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:58,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945622717] [2019-12-18 23:37:58,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511529527] [2019-12-18 23:37:58,082 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-12-18 23:37:58,174 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-12-18 23:37:58,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:37:58,176 INFO L264 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-18 23:37:58,178 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:37:58,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:58,228 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:37:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:37:58,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:37:58,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-12-18 23:37:58,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561085367] [2019-12-18 23:37:58,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-18 23:37:58,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:37:58,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-18 23:37:58,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2019-12-18 23:37:58,253 INFO L87 Difference]: Start difference. First operand 1468 states and 3073 transitions. Second operand 43 states. [2019-12-18 23:37:59,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:37:59,647 INFO L93 Difference]: Finished difference Result 1741 states and 3713 transitions. [2019-12-18 23:37:59,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-12-18 23:37:59,648 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 170 [2019-12-18 23:37:59,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:37:59,650 INFO L225 Difference]: With dead ends: 1741 [2019-12-18 23:37:59,650 INFO L226 Difference]: Without dead ends: 1552 [2019-12-18 23:37:59,651 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2069, Invalid=4737, Unknown=0, NotChecked=0, Total=6806 [2019-12-18 23:37:59,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2019-12-18 23:37:59,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 901. [2019-12-18 23:37:59,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 901 states. [2019-12-18 23:37:59,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1935 transitions. [2019-12-18 23:37:59,667 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1935 transitions. Word has length 170 [2019-12-18 23:37:59,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:37:59,667 INFO L462 AbstractCegarLoop]: Abstraction has 901 states and 1935 transitions. [2019-12-18 23:37:59,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-18 23:37:59,667 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1935 transitions. [2019-12-18 23:37:59,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-12-18 23:37:59,669 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:37:59,669 INFO L411 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:37:59,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:37:59,873 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:37:59,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:37:59,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1467447809, now seen corresponding path program 36 times [2019-12-18 23:37:59,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:37:59,873 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060087628] [2019-12-18 23:37:59,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:37:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:38:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:38:00,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060087628] [2019-12-18 23:38:00,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411982849] [2019-12-18 23:38:00,813 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-18 23:38:00,913 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-12-18 23:38:00,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:38:00,915 INFO L264 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 46 conjunts are in the unsatisfiable core [2019-12-18 23:38:00,918 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:38:00,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:38:00,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:38:00,981 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:38:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:38:01,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:38:01,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2019-12-18 23:38:01,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805099852] [2019-12-18 23:38:01,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-12-18 23:38:01,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:38:01,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-12-18 23:38:01,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2019-12-18 23:38:01,033 INFO L87 Difference]: Start difference. First operand 901 states and 1935 transitions. Second operand 44 states. [2019-12-18 23:38:02,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:38:02,505 INFO L93 Difference]: Finished difference Result 1781 states and 3793 transitions. [2019-12-18 23:38:02,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-12-18 23:38:02,505 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 174 [2019-12-18 23:38:02,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:38:02,507 INFO L225 Difference]: With dead ends: 1781 [2019-12-18 23:38:02,507 INFO L226 Difference]: Without dead ends: 1544 [2019-12-18 23:38:02,507 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1967, Invalid=5173, Unknown=0, NotChecked=0, Total=7140 [2019-12-18 23:38:02,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2019-12-18 23:38:02,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1516. [2019-12-18 23:38:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1516 states. [2019-12-18 23:38:02,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 3169 transitions. [2019-12-18 23:38:02,521 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 3169 transitions. Word has length 174 [2019-12-18 23:38:02,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:38:02,521 INFO L462 AbstractCegarLoop]: Abstraction has 1516 states and 3169 transitions. [2019-12-18 23:38:02,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-12-18 23:38:02,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 3169 transitions. [2019-12-18 23:38:02,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-12-18 23:38:02,523 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:38:02,523 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:38:02,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:38:02,724 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:38:02,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:38:02,724 INFO L82 PathProgramCache]: Analyzing trace with hash -382536802, now seen corresponding path program 37 times [2019-12-18 23:38:02,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:38:02,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111775548] [2019-12-18 23:38:02,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:38:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:38:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:38:03,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111775548] [2019-12-18 23:38:03,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233219964] [2019-12-18 23:38:03,380 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-12-18 23:38:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:38:03,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 46 conjunts are in the unsatisfiable core [2019-12-18 23:38:03,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:38:03,501 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:38:03,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:38:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:38:03,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:38:03,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-12-18 23:38:03,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271708108] [2019-12-18 23:38:03,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-12-18 23:38:03,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:38:03,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-12-18 23:38:03,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=1511, Unknown=0, NotChecked=0, Total=1980 [2019-12-18 23:38:03,524 INFO L87 Difference]: Start difference. First operand 1516 states and 3169 transitions. Second operand 45 states. [2019-12-18 23:38:05,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:38:05,164 INFO L93 Difference]: Finished difference Result 1887 states and 4054 transitions. [2019-12-18 23:38:05,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-12-18 23:38:05,165 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 178 [2019-12-18 23:38:05,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:38:05,167 INFO L225 Difference]: With dead ends: 1887 [2019-12-18 23:38:05,167 INFO L226 Difference]: Without dead ends: 1592 [2019-12-18 23:38:05,168 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2287, Invalid=5369, Unknown=0, NotChecked=0, Total=7656 [2019-12-18 23:38:05,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2019-12-18 23:38:05,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1548. [2019-12-18 23:38:05,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1548 states. [2019-12-18 23:38:05,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 3233 transitions. [2019-12-18 23:38:05,183 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 3233 transitions. Word has length 178 [2019-12-18 23:38:05,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:38:05,184 INFO L462 AbstractCegarLoop]: Abstraction has 1548 states and 3233 transitions. [2019-12-18 23:38:05,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-12-18 23:38:05,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 3233 transitions. [2019-12-18 23:38:05,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-12-18 23:38:05,187 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:38:05,187 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:38:05,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:38:05,388 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:38:05,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:38:05,388 INFO L82 PathProgramCache]: Analyzing trace with hash -166276022, now seen corresponding path program 38 times [2019-12-18 23:38:05,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:38:05,389 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966605972] [2019-12-18 23:38:05,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:38:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-18 23:38:05,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-18 23:38:05,536 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-18 23:38:05,537 INFO L476 BasicCegarLoop]: Counterexample might be feasible [2019-12-18 23:38:05,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 11:38:05 BasicIcfg [2019-12-18 23:38:05,698 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 23:38:05,700 INFO L168 Benchmark]: Toolchain (without parser) took 61665.83 ms. Allocated memory was 146.8 MB in the beginning and 586.2 MB in the end (delta: 439.4 MB). Free memory was 103.6 MB in the beginning and 193.4 MB in the end (delta: -89.8 MB). Peak memory consumption was 349.6 MB. Max. memory is 7.1 GB. [2019-12-18 23:38:05,701 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 146.8 MB. Free memory is still 122.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-12-18 23:38:05,701 INFO L168 Benchmark]: CACSL2BoogieTranslator took 694.61 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 103.6 MB in the beginning and 163.8 MB in the end (delta: -60.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2019-12-18 23:38:05,701 INFO L168 Benchmark]: Boogie Procedure Inliner took 76.96 ms. Allocated memory is still 204.5 MB. Free memory was 163.8 MB in the beginning and 161.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2019-12-18 23:38:05,702 INFO L168 Benchmark]: Boogie Preprocessor took 25.80 ms. Allocated memory is still 204.5 MB. Free memory was 161.9 MB in the beginning and 161.0 MB in the end (delta: 938.3 kB). Peak memory consumption was 938.3 kB. Max. memory is 7.1 GB. [2019-12-18 23:38:05,702 INFO L168 Benchmark]: RCFGBuilder took 441.56 ms. Allocated memory is still 204.5 MB. Free memory was 161.0 MB in the beginning and 140.9 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2019-12-18 23:38:05,703 INFO L168 Benchmark]: TraceAbstraction took 60421.56 ms. Allocated memory was 204.5 MB in the beginning and 586.2 MB in the end (delta: 381.7 MB). Free memory was 140.9 MB in the beginning and 193.4 MB in the end (delta: -52.4 MB). Peak memory consumption was 329.2 MB. Max. memory is 7.1 GB. [2019-12-18 23:38:05,705 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 146.8 MB. Free memory is still 122.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 694.61 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 103.6 MB in the beginning and 163.8 MB in the end (delta: -60.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 76.96 ms. Allocated memory is still 204.5 MB. Free memory was 163.8 MB in the beginning and 161.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.80 ms. Allocated memory is still 204.5 MB. Free memory was 161.9 MB in the beginning and 161.0 MB in the end (delta: 938.3 kB). Peak memory consumption was 938.3 kB. Max. memory is 7.1 GB. * RCFGBuilder took 441.56 ms. Allocated memory is still 204.5 MB. Free memory was 161.0 MB in the beginning and 140.9 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 60421.56 ms. Allocated memory was 204.5 MB in the beginning and 586.2 MB in the end (delta: 381.7 MB). Free memory was 140.9 MB in the beginning and 193.4 MB in the end (delta: -52.4 MB). Peak memory consumption was 329.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; VAL [i=3, j=6] [L693] 0 pthread_t id1, id2; VAL [i=3, j=6] [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=7] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=10] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=10, k=10] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=11, k=10] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=10] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=11] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=11, k=11] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=11, k=12] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=11, k=12] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=12] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=12, k=12] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=13, k=12] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=12] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=13] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=13, k=13] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=14, k=13] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=13] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=14] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=14, k=14] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=14, k=15] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=14, k=15] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=15, k=15] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=15, k=15] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=16, k=15] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=15] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=16] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=16, k=16] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=16, k=17] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=16] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=17] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=17, k=17] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=17, k=18] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=17, k=18] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=18, k=18] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=18, k=18] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=19, k=18] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=18] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=19] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=19, k=19] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=19, k=19] [L697] 0 int condI = i >= (2*20 +6); [L700] 0 int condJ = j >= (2*20 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=19, k=19] [L702] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=19, k=19] [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=19, k=19] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Result: UNSAFE, OverallTime: 60.1s, OverallIterations: 44, TraceHistogramMax: 20, AutomataDifference: 29.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 2504 SDtfs, 20095 SDslu, 30174 SDs, 0 SdLazy, 5687 SolverSat, 3265 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5851 GetRequests, 3990 SyntacticMatches, 0 SemanticMatches, 1861 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20429 ImplicationChecksByTransitivity, 35.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1548occurred in iteration=43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 43 MinimizatonAttempts, 7188 StatesRemovedByMinimization, 41 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 16.6s InterpolantComputationTime, 8234 NumberOfCodeBlocks, 8234 NumberOfCodeBlocksAsserted, 284 NumberOfCheckSat, 7974 ConstructedInterpolants, 0 QuantifiedInterpolants, 2869510 SizeOfPredicates, 937 NumberOfNonLiveVariables, 9095 ConjunctsInSsa, 1071 ConjunctsInUnsatCore, 82 InterpolantComputations, 4 PerfectInterpolantSequences, 0/36596 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...