/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-VariableLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 23:02:05,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 23:02:05,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 23:02:05,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 23:02:05,749 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 23:02:05,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 23:02:05,753 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 23:02:05,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 23:02:05,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 23:02:05,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 23:02:05,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 23:02:05,771 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 23:02:05,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 23:02:05,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 23:02:05,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 23:02:05,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 23:02:05,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 23:02:05,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 23:02:05,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 23:02:05,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 23:02:05,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 23:02:05,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 23:02:05,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 23:02:05,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 23:02:05,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 23:02:05,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 23:02:05,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 23:02:05,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 23:02:05,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 23:02:05,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 23:02:05,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 23:02:05,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 23:02:05,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 23:02:05,803 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 23:02:05,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 23:02:05,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 23:02:05,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 23:02:05,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 23:02:05,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 23:02:05,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 23:02:05,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 23:02:05,808 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-VariableLbe.epf [2020-04-17 23:02:05,823 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 23:02:05,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 23:02:05,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 23:02:05,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 23:02:05,824 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 23:02:05,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 23:02:05,825 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 23:02:05,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 23:02:05,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 23:02:05,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 23:02:05,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 23:02:05,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 23:02:05,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 23:02:05,826 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 23:02:05,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 23:02:05,826 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 23:02:05,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 23:02:05,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 23:02:05,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 23:02:05,827 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 23:02:05,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 23:02:05,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 23:02:05,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 23:02:05,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 23:02:05,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 23:02:05,828 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 23:02:05,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 23:02:05,829 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-04-17 23:02:05,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 23:02:05,829 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 23:02:06,100 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 23:02:06,118 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 23:02:06,121 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 23:02:06,123 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 23:02:06,123 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 23:02:06,124 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-04-17 23:02:06,190 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/387edc0a6/a4afdba9de554d6fb7ec2bba43d6b34a/FLAG31043e58d [2020-04-17 23:02:06,741 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 23:02:06,742 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2020-04-17 23:02:06,765 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/387edc0a6/a4afdba9de554d6fb7ec2bba43d6b34a/FLAG31043e58d [2020-04-17 23:02:07,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/387edc0a6/a4afdba9de554d6fb7ec2bba43d6b34a [2020-04-17 23:02:07,030 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 23:02:07,047 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 23:02:07,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 23:02:07,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 23:02:07,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 23:02:07,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 11:02:07" (1/1) ... [2020-04-17 23:02:07,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5afc5240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:07, skipping insertion in model container [2020-04-17 23:02:07,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 11:02:07" (1/1) ... [2020-04-17 23:02:07,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 23:02:07,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 23:02:07,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 23:02:07,555 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 23:02:07,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 23:02:07,692 INFO L208 MainTranslator]: Completed translation [2020-04-17 23:02:07,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:07 WrapperNode [2020-04-17 23:02:07,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 23:02:07,694 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 23:02:07,694 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 23:02:07,694 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 23:02:07,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:07" (1/1) ... [2020-04-17 23:02:07,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:07" (1/1) ... [2020-04-17 23:02:07,740 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 23:02:07,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 23:02:07,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 23:02:07,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 23:02:07,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:07" (1/1) ... [2020-04-17 23:02:07,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:07" (1/1) ... [2020-04-17 23:02:07,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:07" (1/1) ... [2020-04-17 23:02:07,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:07" (1/1) ... [2020-04-17 23:02:07,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:07" (1/1) ... [2020-04-17 23:02:07,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:07" (1/1) ... [2020-04-17 23:02:07,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:07" (1/1) ... [2020-04-17 23:02:07,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 23:02:07,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 23:02:07,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 23:02:07,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 23:02:07,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 23:02:07,830 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-17 23:02:07,831 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-17 23:02:07,831 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-17 23:02:07,831 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-17 23:02:07,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 23:02:07,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-17 23:02:07,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 23:02:07,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 23:02:07,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-17 23:02:07,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 23:02:07,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 23:02:07,835 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 23:02:08,160 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 23:02:08,160 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-17 23:02:08,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 11:02:08 BoogieIcfgContainer [2020-04-17 23:02:08,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 23:02:08,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 23:02:08,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 23:02:08,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 23:02:08,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 11:02:07" (1/3) ... [2020-04-17 23:02:08,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611ff10b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 11:02:08, skipping insertion in model container [2020-04-17 23:02:08,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:07" (2/3) ... [2020-04-17 23:02:08,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611ff10b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 11:02:08, skipping insertion in model container [2020-04-17 23:02:08,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 11:02:08" (3/3) ... [2020-04-17 23:02:08,176 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-04-17 23:02:08,186 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 23:02:08,186 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 23:02:08,192 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 23:02:08,193 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 23:02:08,220 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,220 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,220 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,221 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,221 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,222 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,222 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,223 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,223 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,223 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,223 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,224 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,224 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,224 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,225 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,225 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,225 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,226 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,226 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,226 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,227 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,227 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,227 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,229 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,230 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,230 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,230 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,230 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,239 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,239 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,239 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,240 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,240 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,241 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,250 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,251 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,251 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,251 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,251 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,252 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:08,265 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-17 23:02:08,282 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 23:02:08,282 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 23:02:08,282 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 23:02:08,282 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 23:02:08,282 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 23:02:08,282 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 23:02:08,283 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 23:02:08,283 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 23:02:08,298 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-04-17 23:02:08,300 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-17 23:02:08,341 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-17 23:02:08,342 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 23:02:08,348 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-04-17 23:02:08,350 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-17 23:02:08,369 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-17 23:02:08,370 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 23:02:08,371 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-04-17 23:02:08,373 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-04-17 23:02:08,374 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-17 23:02:09,511 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-04-17 23:02:09,760 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-04-17 23:02:09,760 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-04-17 23:02:09,764 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-04-17 23:02:09,776 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-17 23:02:09,778 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-17 23:02:09,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-17 23:02:09,786 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:09,787 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-17 23:02:09,787 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:09,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:09,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-04-17 23:02:09,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:09,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941634197] [2020-04-17 23:02:09,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:10,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941634197] [2020-04-17 23:02:10,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:02:10,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 23:02:10,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612564816] [2020-04-17 23:02:10,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 23:02:10,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:10,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 23:02:10,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 23:02:10,124 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-17 23:02:10,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:10,216 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-04-17 23:02:10,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 23:02:10,218 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-17 23:02:10,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:10,230 INFO L225 Difference]: With dead ends: 75 [2020-04-17 23:02:10,230 INFO L226 Difference]: Without dead ends: 42 [2020-04-17 23:02:10,232 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 23:02:10,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-04-17 23:02:10,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-04-17 23:02:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 23:02:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-04-17 23:02:10,273 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-04-17 23:02:10,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:10,274 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-04-17 23:02:10,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 23:02:10,274 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-04-17 23:02:10,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 23:02:10,275 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:10,275 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:10,276 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:10,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:10,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-04-17 23:02:10,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:10,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697617349] [2020-04-17 23:02:10,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:10,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697617349] [2020-04-17 23:02:10,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:02:10,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 23:02:10,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201212815] [2020-04-17 23:02:10,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 23:02:10,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:10,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 23:02:10,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 23:02:10,417 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-04-17 23:02:10,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:10,453 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-04-17 23:02:10,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 23:02:10,453 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 23:02:10,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:10,454 INFO L225 Difference]: With dead ends: 56 [2020-04-17 23:02:10,454 INFO L226 Difference]: Without dead ends: 50 [2020-04-17 23:02:10,455 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-04-17 23:02:10,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-04-17 23:02:10,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-04-17 23:02:10,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 23:02:10,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-04-17 23:02:10,462 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-04-17 23:02:10,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:10,463 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-04-17 23:02:10,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 23:02:10,464 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-04-17 23:02:10,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 23:02:10,465 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:10,465 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:10,465 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:10,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:10,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-04-17 23:02:10,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:10,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562213271] [2020-04-17 23:02:10,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:10,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562213271] [2020-04-17 23:02:10,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:02:10,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 23:02:10,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232280420] [2020-04-17 23:02:10,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 23:02:10,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:10,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 23:02:10,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-17 23:02:10,543 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-04-17 23:02:10,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:10,655 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-04-17 23:02:10,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 23:02:10,655 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 23:02:10,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:10,657 INFO L225 Difference]: With dead ends: 78 [2020-04-17 23:02:10,657 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 23:02:10,657 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:10,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 23:02:10,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-04-17 23:02:10,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 23:02:10,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 23:02:10,671 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-04-17 23:02:10,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:10,672 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 23:02:10,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 23:02:10,672 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 23:02:10,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 23:02:10,673 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:10,673 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:10,673 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:10,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:10,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-04-17 23:02:10,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:10,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061195978] [2020-04-17 23:02:10,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:10,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061195978] [2020-04-17 23:02:10,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:02:10,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 23:02:10,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925031653] [2020-04-17 23:02:10,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 23:02:10,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:10,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 23:02:10,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-17 23:02:10,779 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-04-17 23:02:10,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:10,881 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-04-17 23:02:10,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 23:02:10,882 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 23:02:10,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:10,883 INFO L225 Difference]: With dead ends: 54 [2020-04-17 23:02:10,883 INFO L226 Difference]: Without dead ends: 43 [2020-04-17 23:02:10,884 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-04-17 23:02:10,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-04-17 23:02:10,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-04-17 23:02:10,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-04-17 23:02:10,890 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-04-17 23:02:10,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:10,891 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-04-17 23:02:10,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 23:02:10,891 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-04-17 23:02:10,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 23:02:10,895 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:10,895 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:10,895 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:10,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:10,896 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-04-17 23:02:10,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:10,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795436128] [2020-04-17 23:02:10,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:10,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795436128] [2020-04-17 23:02:10,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:02:10,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 23:02:10,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124975130] [2020-04-17 23:02:10,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 23:02:10,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:10,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 23:02:10,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-04-17 23:02:10,995 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-04-17 23:02:11,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:11,077 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-04-17 23:02:11,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 23:02:11,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 23:02:11,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:11,080 INFO L225 Difference]: With dead ends: 57 [2020-04-17 23:02:11,080 INFO L226 Difference]: Without dead ends: 51 [2020-04-17 23:02:11,081 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:11,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-04-17 23:02:11,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-04-17 23:02:11,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-04-17 23:02:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-04-17 23:02:11,089 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-04-17 23:02:11,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:11,090 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-04-17 23:02:11,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 23:02:11,090 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-04-17 23:02:11,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 23:02:11,091 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:11,091 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:11,091 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:11,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:11,091 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-04-17 23:02:11,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:11,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764889072] [2020-04-17 23:02:11,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:11,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764889072] [2020-04-17 23:02:11,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804592597] [2020-04-17 23:02:11,149 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:11,223 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:11,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:11,225 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 23:02:11,230 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:11,256 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:11,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:11,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 23:02:11,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256711275] [2020-04-17 23:02:11,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 23:02:11,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:11,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 23:02:11,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-04-17 23:02:11,276 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-04-17 23:02:11,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:11,419 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-04-17 23:02:11,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 23:02:11,419 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 23:02:11,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:11,420 INFO L225 Difference]: With dead ends: 48 [2020-04-17 23:02:11,420 INFO L226 Difference]: Without dead ends: 43 [2020-04-17 23:02:11,421 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:11,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-04-17 23:02:11,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-04-17 23:02:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-04-17 23:02:11,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-04-17 23:02:11,431 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-04-17 23:02:11,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:11,432 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-04-17 23:02:11,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 23:02:11,432 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-04-17 23:02:11,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 23:02:11,432 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:11,433 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:11,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:11,634 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:11,634 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-04-17 23:02:11,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:11,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677230470] [2020-04-17 23:02:11,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:11,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677230470] [2020-04-17 23:02:11,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506436915] [2020-04-17 23:02:11,715 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:11,762 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:11,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:11,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 23:02:11,764 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:11,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:11,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:11,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-17 23:02:11,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037478550] [2020-04-17 23:02:11,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 23:02:11,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:11,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 23:02:11,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 23:02:11,780 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-04-17 23:02:11,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:11,866 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-04-17 23:02:11,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 23:02:11,866 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-04-17 23:02:11,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:11,867 INFO L225 Difference]: With dead ends: 54 [2020-04-17 23:02:11,867 INFO L226 Difference]: Without dead ends: 48 [2020-04-17 23:02:11,868 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:11,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-04-17 23:02:11,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-04-17 23:02:11,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 23:02:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-04-17 23:02:11,880 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-04-17 23:02:11,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:11,880 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-04-17 23:02:11,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 23:02:11,881 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-04-17 23:02:11,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 23:02:11,882 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:11,882 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:12,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:12,093 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:12,094 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-04-17 23:02:12,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:12,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115444859] [2020-04-17 23:02:12,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:12,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:12,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115444859] [2020-04-17 23:02:12,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166561332] [2020-04-17 23:02:12,181 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:12,235 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 23:02:12,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:12,236 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 23:02:12,237 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:12,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:12,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:12,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 23:02:12,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901784552] [2020-04-17 23:02:12,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 23:02:12,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:12,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 23:02:12,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-04-17 23:02:12,263 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-04-17 23:02:12,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:12,407 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-04-17 23:02:12,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 23:02:12,408 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 23:02:12,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:12,409 INFO L225 Difference]: With dead ends: 58 [2020-04-17 23:02:12,409 INFO L226 Difference]: Without dead ends: 52 [2020-04-17 23:02:12,409 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:12,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-04-17 23:02:12,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-04-17 23:02:12,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-04-17 23:02:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-04-17 23:02:12,422 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-04-17 23:02:12,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:12,424 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-04-17 23:02:12,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 23:02:12,424 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-04-17 23:02:12,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 23:02:12,425 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:12,425 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:12,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:12,626 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:12,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:12,627 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-04-17 23:02:12,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:12,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080126466] [2020-04-17 23:02:12,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:12,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080126466] [2020-04-17 23:02:12,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629907083] [2020-04-17 23:02:12,686 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:12,757 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 23:02:12,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:12,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:12,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-17 23:02:12,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334894425] [2020-04-17 23:02:12,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 23:02:12,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:12,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 23:02:12,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-04-17 23:02:12,783 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-04-17 23:02:12,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:12,951 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-04-17 23:02:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:02:12,953 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-04-17 23:02:12,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:12,955 INFO L225 Difference]: With dead ends: 78 [2020-04-17 23:02:12,955 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 23:02:12,956 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:12,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 23:02:12,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-04-17 23:02:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 23:02:12,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-04-17 23:02:12,968 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-04-17 23:02:12,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:12,969 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-04-17 23:02:12,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 23:02:12,969 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-04-17 23:02:12,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 23:02:12,970 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:12,970 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:13,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:13,175 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:13,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:13,176 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-04-17 23:02:13,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:13,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570599383] [2020-04-17 23:02:13,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:13,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570599383] [2020-04-17 23:02:13,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469227688] [2020-04-17 23:02:13,288 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:13,359 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:13,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:13,360 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 23:02:13,362 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:13,404 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:13,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:13,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 23:02:13,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554178453] [2020-04-17 23:02:13,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 23:02:13,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:13,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 23:02:13,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-04-17 23:02:13,422 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-04-17 23:02:13,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:13,618 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-04-17 23:02:13,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 23:02:13,619 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 23:02:13,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:13,620 INFO L225 Difference]: With dead ends: 62 [2020-04-17 23:02:13,620 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 23:02:13,620 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:13,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 23:02:13,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-04-17 23:02:13,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-04-17 23:02:13,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-04-17 23:02:13,631 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-04-17 23:02:13,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:13,631 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-04-17 23:02:13,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 23:02:13,631 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-04-17 23:02:13,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 23:02:13,632 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:13,632 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:13,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:13,836 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:13,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:13,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-04-17 23:02:13,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:13,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393729206] [2020-04-17 23:02:13,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:13,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393729206] [2020-04-17 23:02:13,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239308293] [2020-04-17 23:02:13,916 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:13,967 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 23:02:13,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:13,968 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 23:02:13,970 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:13,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:13,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-17 23:02:13,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591885164] [2020-04-17 23:02:13,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 23:02:13,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:13,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 23:02:13,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-04-17 23:02:13,982 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-04-17 23:02:14,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:14,098 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-04-17 23:02:14,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 23:02:14,098 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-04-17 23:02:14,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:14,099 INFO L225 Difference]: With dead ends: 64 [2020-04-17 23:02:14,099 INFO L226 Difference]: Without dead ends: 58 [2020-04-17 23:02:14,100 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-04-17 23:02:14,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-04-17 23:02:14,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-04-17 23:02:14,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-04-17 23:02:14,104 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-04-17 23:02:14,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:14,104 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-04-17 23:02:14,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 23:02:14,105 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-04-17 23:02:14,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 23:02:14,105 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:14,105 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:14,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:14,309 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:14,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:14,310 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-04-17 23:02:14,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:14,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706156000] [2020-04-17 23:02:14,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:14,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706156000] [2020-04-17 23:02:14,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564011103] [2020-04-17 23:02:14,397 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:14,449 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:14,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:14,450 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 23:02:14,453 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:14,465 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:14,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:14,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 23:02:14,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679819445] [2020-04-17 23:02:14,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 23:02:14,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:14,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 23:02:14,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:14,478 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-04-17 23:02:14,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:14,673 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-04-17 23:02:14,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 23:02:14,673 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 23:02:14,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:14,674 INFO L225 Difference]: With dead ends: 61 [2020-04-17 23:02:14,675 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 23:02:14,675 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:02:14,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 23:02:14,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-04-17 23:02:14,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-04-17 23:02:14,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-04-17 23:02:14,680 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-04-17 23:02:14,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:14,680 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-04-17 23:02:14,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 23:02:14,681 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-04-17 23:02:14,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 23:02:14,681 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:14,681 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:14,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:14,888 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:14,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:14,888 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-04-17 23:02:14,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:14,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025320503] [2020-04-17 23:02:14,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:14,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025320503] [2020-04-17 23:02:14,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857772747] [2020-04-17 23:02:14,960 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:15,020 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:15,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:15,021 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 23:02:15,022 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:15,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:15,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-17 23:02:15,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000370504] [2020-04-17 23:02:15,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 23:02:15,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:15,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 23:02:15,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-04-17 23:02:15,041 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-04-17 23:02:15,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:15,193 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-04-17 23:02:15,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:02:15,194 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-04-17 23:02:15,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:15,196 INFO L225 Difference]: With dead ends: 77 [2020-04-17 23:02:15,196 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 23:02:15,196 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:15,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 23:02:15,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-04-17 23:02:15,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-04-17 23:02:15,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-04-17 23:02:15,201 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-04-17 23:02:15,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:15,202 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-04-17 23:02:15,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 23:02:15,202 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-04-17 23:02:15,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 23:02:15,203 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:15,203 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:15,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:15,412 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:15,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:15,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-04-17 23:02:15,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:15,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269393220] [2020-04-17 23:02:15,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:15,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269393220] [2020-04-17 23:02:15,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110759328] [2020-04-17 23:02:15,474 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:15,518 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 23:02:15,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:15,519 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 23:02:15,520 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:15,533 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:15,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:15,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 23:02:15,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085707317] [2020-04-17 23:02:15,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 23:02:15,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:15,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 23:02:15,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:15,543 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-04-17 23:02:15,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:15,777 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-04-17 23:02:15,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:02:15,777 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 23:02:15,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:15,778 INFO L225 Difference]: With dead ends: 58 [2020-04-17 23:02:15,778 INFO L226 Difference]: Without dead ends: 50 [2020-04-17 23:02:15,779 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:02:15,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-04-17 23:02:15,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-04-17 23:02:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-04-17 23:02:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-04-17 23:02:15,781 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-04-17 23:02:15,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:15,782 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-04-17 23:02:15,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 23:02:15,782 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-04-17 23:02:15,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 23:02:15,783 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:15,783 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:15,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:15,987 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:15,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:15,987 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-04-17 23:02:15,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:15,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071354613] [2020-04-17 23:02:15,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:16,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071354613] [2020-04-17 23:02:16,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631551227] [2020-04-17 23:02:16,052 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:16,095 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 23:02:16,096 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:16,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:16,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:16,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 23:02:16,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262119400] [2020-04-17 23:02:16,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 23:02:16,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:16,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 23:02:16,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:16,122 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-04-17 23:02:16,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:16,330 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-04-17 23:02:16,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:02:16,330 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 23:02:16,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:16,331 INFO L225 Difference]: With dead ends: 60 [2020-04-17 23:02:16,332 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 23:02:16,332 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:02:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 23:02:16,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-04-17 23:02:16,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 23:02:16,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 23:02:16,336 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-04-17 23:02:16,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:16,336 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 23:02:16,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 23:02:16,336 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 23:02:16,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:16,337 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:16,337 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:16,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:16,545 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:16,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:16,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-04-17 23:02:16,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:16,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565454995] [2020-04-17 23:02:16,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:16,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565454995] [2020-04-17 23:02:16,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843559542] [2020-04-17 23:02:16,615 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:16,668 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:16,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:16,669 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 23:02:16,670 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:16,686 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:16,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:16,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 23:02:16,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752677502] [2020-04-17 23:02:16,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:16,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:16,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:16,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:16,698 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-04-17 23:02:16,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:16,908 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-04-17 23:02:16,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:02:16,913 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 23:02:16,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:16,914 INFO L225 Difference]: With dead ends: 54 [2020-04-17 23:02:16,914 INFO L226 Difference]: Without dead ends: 49 [2020-04-17 23:02:16,914 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:02:16,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-04-17 23:02:16,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-04-17 23:02:16,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-04-17 23:02:16,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-04-17 23:02:16,917 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-04-17 23:02:16,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:16,917 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-04-17 23:02:16,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:16,918 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-04-17 23:02:16,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:16,918 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:16,918 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:17,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:17,124 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:17,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:17,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-04-17 23:02:17,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:17,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237131352] [2020-04-17 23:02:17,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:17,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237131352] [2020-04-17 23:02:17,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149516412] [2020-04-17 23:02:17,207 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:17,259 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:02:17,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:17,260 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 23:02:17,261 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:17,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:17,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 23:02:17,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015898744] [2020-04-17 23:02:17,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 23:02:17,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:17,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 23:02:17,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:17,270 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-04-17 23:02:17,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:17,399 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-04-17 23:02:17,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 23:02:17,400 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 23:02:17,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:17,400 INFO L225 Difference]: With dead ends: 60 [2020-04-17 23:02:17,400 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 23:02:17,401 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:17,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 23:02:17,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-04-17 23:02:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 23:02:17,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-04-17 23:02:17,404 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-04-17 23:02:17,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:17,405 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-04-17 23:02:17,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 23:02:17,405 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-04-17 23:02:17,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:17,405 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:17,406 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:17,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:17,609 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:17,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:17,610 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-04-17 23:02:17,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:17,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850971266] [2020-04-17 23:02:17,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:17,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:17,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850971266] [2020-04-17 23:02:17,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140548011] [2020-04-17 23:02:17,694 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:17,765 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:17,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:17,766 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 23:02:17,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:17,779 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:17,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:17,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 23:02:17,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457278689] [2020-04-17 23:02:17,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:17,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:17,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:17,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:17,789 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-04-17 23:02:17,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:17,947 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-04-17 23:02:17,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 23:02:17,948 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 23:02:17,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:17,948 INFO L225 Difference]: With dead ends: 66 [2020-04-17 23:02:17,948 INFO L226 Difference]: Without dead ends: 60 [2020-04-17 23:02:17,949 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:02:17,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-17 23:02:17,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-04-17 23:02:17,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-04-17 23:02:17,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-04-17 23:02:17,951 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-04-17 23:02:17,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:17,952 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-04-17 23:02:17,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:17,952 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-04-17 23:02:17,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:17,952 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:17,952 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:18,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:18,156 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:18,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:18,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-04-17 23:02:18,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:18,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75936065] [2020-04-17 23:02:18,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:18,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:18,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75936065] [2020-04-17 23:02:18,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118975644] [2020-04-17 23:02:18,227 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:18,271 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:02:18,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:18,272 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 23:02:18,273 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:18,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:18,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 23:02:18,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938031178] [2020-04-17 23:02:18,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 23:02:18,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:18,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 23:02:18,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:18,297 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-04-17 23:02:18,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:18,483 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-04-17 23:02:18,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 23:02:18,484 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 23:02:18,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:18,485 INFO L225 Difference]: With dead ends: 67 [2020-04-17 23:02:18,485 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 23:02:18,486 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:02:18,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 23:02:18,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-04-17 23:02:18,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-04-17 23:02:18,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-04-17 23:02:18,489 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-04-17 23:02:18,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:18,490 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-04-17 23:02:18,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 23:02:18,490 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-04-17 23:02:18,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:18,490 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:18,490 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:18,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:18,695 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:18,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:18,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-04-17 23:02:18,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:18,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582137272] [2020-04-17 23:02:18,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:18,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582137272] [2020-04-17 23:02:18,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678680039] [2020-04-17 23:02:18,793 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:18,848 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:02:18,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:18,849 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 23:02:18,850 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:18,865 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:18,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:18,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 23:02:18,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528996958] [2020-04-17 23:02:18,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:18,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:18,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:18,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:18,877 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-04-17 23:02:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:19,104 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-04-17 23:02:19,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:02:19,104 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 23:02:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:19,105 INFO L225 Difference]: With dead ends: 69 [2020-04-17 23:02:19,105 INFO L226 Difference]: Without dead ends: 63 [2020-04-17 23:02:19,105 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:02:19,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-04-17 23:02:19,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-04-17 23:02:19,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 23:02:19,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 23:02:19,108 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-04-17 23:02:19,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:19,108 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 23:02:19,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:19,109 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 23:02:19,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:19,109 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:19,109 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:19,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:19,313 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:19,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:19,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-04-17 23:02:19,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:19,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737115153] [2020-04-17 23:02:19,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:19,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737115153] [2020-04-17 23:02:19,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487349733] [2020-04-17 23:02:19,379 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:19,422 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 23:02:19,423 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:19,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:19,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 23:02:19,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430601543] [2020-04-17 23:02:19,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 23:02:19,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:19,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 23:02:19,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:19,441 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-04-17 23:02:19,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:19,651 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-04-17 23:02:19,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:19,654 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 23:02:19,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:19,655 INFO L225 Difference]: With dead ends: 88 [2020-04-17 23:02:19,655 INFO L226 Difference]: Without dead ends: 82 [2020-04-17 23:02:19,656 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:02:19,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-04-17 23:02:19,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-04-17 23:02:19,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 23:02:19,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-04-17 23:02:19,659 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-04-17 23:02:19,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:19,660 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-04-17 23:02:19,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 23:02:19,660 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-04-17 23:02:19,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:19,660 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:19,660 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:19,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:19,864 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:19,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:19,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-04-17 23:02:19,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:19,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648653797] [2020-04-17 23:02:19,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:19,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648653797] [2020-04-17 23:02:19,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408091870] [2020-04-17 23:02:19,935 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:19,982 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:19,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:19,983 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:19,984 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:20,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:20,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 23:02:20,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749418128] [2020-04-17 23:02:20,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:20,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:20,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:20,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:20,011 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-04-17 23:02:20,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:20,311 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-04-17 23:02:20,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:02:20,311 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 23:02:20,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:20,312 INFO L225 Difference]: With dead ends: 69 [2020-04-17 23:02:20,312 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 23:02:20,312 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:02:20,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 23:02:20,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-04-17 23:02:20,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-04-17 23:02:20,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-04-17 23:02:20,315 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-04-17 23:02:20,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:20,315 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-04-17 23:02:20,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:20,315 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-04-17 23:02:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:20,318 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:20,318 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:20,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:20,521 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:20,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:20,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-04-17 23:02:20,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:20,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786408267] [2020-04-17 23:02:20,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:20,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:20,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786408267] [2020-04-17 23:02:20,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738853726] [2020-04-17 23:02:20,607 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:20,652 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:02:20,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:20,653 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:20,655 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:20,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:20,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 23:02:20,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087582865] [2020-04-17 23:02:20,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:20,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:20,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:20,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:20,670 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-04-17 23:02:20,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:20,819 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-04-17 23:02:20,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:02:20,820 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 23:02:20,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:20,821 INFO L225 Difference]: With dead ends: 74 [2020-04-17 23:02:20,821 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 23:02:20,821 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:02:20,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 23:02:20,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-04-17 23:02:20,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 23:02:20,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 23:02:20,826 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-04-17 23:02:20,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:20,827 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 23:02:20,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:20,827 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 23:02:20,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:20,828 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:20,828 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:21,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:21,029 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:21,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:21,029 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-04-17 23:02:21,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:21,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039533125] [2020-04-17 23:02:21,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:21,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039533125] [2020-04-17 23:02:21,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270188946] [2020-04-17 23:02:21,118 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:21,164 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:21,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:21,164 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:21,165 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:21,185 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:21,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:21,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 23:02:21,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194514800] [2020-04-17 23:02:21,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:21,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:21,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:21,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:21,195 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-04-17 23:02:21,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:21,417 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-04-17 23:02:21,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:02:21,418 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 23:02:21,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:21,419 INFO L225 Difference]: With dead ends: 71 [2020-04-17 23:02:21,419 INFO L226 Difference]: Without dead ends: 65 [2020-04-17 23:02:21,419 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:02:21,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-04-17 23:02:21,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-04-17 23:02:21,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 23:02:21,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 23:02:21,422 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-04-17 23:02:21,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:21,422 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 23:02:21,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 23:02:21,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:21,423 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:21,423 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:21,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:21,624 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:21,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:21,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-04-17 23:02:21,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:21,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740911303] [2020-04-17 23:02:21,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:21,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740911303] [2020-04-17 23:02:21,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326549077] [2020-04-17 23:02:21,701 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:21,749 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:02:21,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:21,750 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:21,751 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:21,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:21,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 23:02:21,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711704021] [2020-04-17 23:02:21,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:21,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:21,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:21,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:21,787 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-04-17 23:02:21,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:21,974 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-04-17 23:02:21,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 23:02:21,975 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 23:02:21,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:21,976 INFO L225 Difference]: With dead ends: 68 [2020-04-17 23:02:21,976 INFO L226 Difference]: Without dead ends: 62 [2020-04-17 23:02:21,977 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:02:21,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-04-17 23:02:21,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-04-17 23:02:21,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 23:02:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 23:02:21,981 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-04-17 23:02:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:21,981 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 23:02:21,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:21,982 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 23:02:21,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:21,982 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:21,982 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:22,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:22,186 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:22,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:22,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-04-17 23:02:22,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:22,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093127208] [2020-04-17 23:02:22,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:22,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:22,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093127208] [2020-04-17 23:02:22,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373765871] [2020-04-17 23:02:22,268 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:22,314 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:02:22,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:22,315 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:22,316 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:22,339 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:22,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:22,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 23:02:22,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63674446] [2020-04-17 23:02:22,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:22,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:22,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:22,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:22,350 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-04-17 23:02:22,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:22,626 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-04-17 23:02:22,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:02:22,627 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 23:02:22,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:22,628 INFO L225 Difference]: With dead ends: 67 [2020-04-17 23:02:22,628 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 23:02:22,628 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:02:22,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 23:02:22,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-04-17 23:02:22,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 23:02:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 23:02:22,632 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-04-17 23:02:22,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:22,632 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 23:02:22,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 23:02:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:22,633 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:22,633 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:22,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:22,837 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:22,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:22,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-04-17 23:02:22,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:22,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833941100] [2020-04-17 23:02:22,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:22,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833941100] [2020-04-17 23:02:22,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791691198] [2020-04-17 23:02:22,907 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:22,953 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:22,956 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:22,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:22,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 23:02:22,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162461096] [2020-04-17 23:02:22,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:22,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:22,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:22,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:22,969 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-04-17 23:02:23,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:23,202 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-04-17 23:02:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:23,203 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 23:02:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:23,203 INFO L225 Difference]: With dead ends: 83 [2020-04-17 23:02:23,204 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 23:02:23,204 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:02:23,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 23:02:23,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-04-17 23:02:23,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 23:02:23,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-04-17 23:02:23,207 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-04-17 23:02:23,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:23,207 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-04-17 23:02:23,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:23,208 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-04-17 23:02:23,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:23,208 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:23,208 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:23,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:23,409 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:23,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:23,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-04-17 23:02:23,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:23,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084566512] [2020-04-17 23:02:23,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:23,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084566512] [2020-04-17 23:02:23,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519750369] [2020-04-17 23:02:23,483 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:23,538 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:23,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:23,539 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:23,540 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:23,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:23,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:23,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 23:02:23,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396163706] [2020-04-17 23:02:23,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:23,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:23,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:23,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:23,576 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-04-17 23:02:23,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:23,913 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-04-17 23:02:23,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:02:23,914 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 23:02:23,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:23,914 INFO L225 Difference]: With dead ends: 64 [2020-04-17 23:02:23,914 INFO L226 Difference]: Without dead ends: 56 [2020-04-17 23:02:23,915 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:02:23,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-04-17 23:02:23,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-04-17 23:02:23,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-04-17 23:02:23,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-04-17 23:02:23,917 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-04-17 23:02:23,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:23,917 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-04-17 23:02:23,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:23,918 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-04-17 23:02:23,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:23,918 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:23,918 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:24,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:24,122 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:24,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:24,122 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-04-17 23:02:24,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:24,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315672865] [2020-04-17 23:02:24,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:24,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315672865] [2020-04-17 23:02:24,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047730336] [2020-04-17 23:02:24,210 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:24,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:02:24,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:24,256 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:24,257 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:24,277 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:24,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:24,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 23:02:24,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958510528] [2020-04-17 23:02:24,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:24,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:24,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:24,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:24,289 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-04-17 23:02:24,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:24,615 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-04-17 23:02:24,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:24,615 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 23:02:24,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:24,616 INFO L225 Difference]: With dead ends: 68 [2020-04-17 23:02:24,616 INFO L226 Difference]: Without dead ends: 63 [2020-04-17 23:02:24,617 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:02:24,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-04-17 23:02:24,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-04-17 23:02:24,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 23:02:24,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-04-17 23:02:24,620 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-04-17 23:02:24,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:24,621 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-04-17 23:02:24,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:24,621 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-04-17 23:02:24,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:24,621 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:24,621 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:24,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:24,825 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:24,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:24,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-04-17 23:02:24,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:24,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732460687] [2020-04-17 23:02:24,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:24,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732460687] [2020-04-17 23:02:24,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062088752] [2020-04-17 23:02:24,897 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:24,949 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:24,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:24,950 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:24,951 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:24,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:25,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:25,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 23:02:25,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286144944] [2020-04-17 23:02:25,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:25,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:25,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:25,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:25,001 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-04-17 23:02:25,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:25,293 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-04-17 23:02:25,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:25,293 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 23:02:25,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:25,294 INFO L225 Difference]: With dead ends: 60 [2020-04-17 23:02:25,294 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 23:02:25,295 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:02:25,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 23:02:25,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-04-17 23:02:25,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 23:02:25,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-04-17 23:02:25,297 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-04-17 23:02:25,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:25,297 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-04-17 23:02:25,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:25,298 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-04-17 23:02:25,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:25,298 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:25,298 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:25,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:25,501 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:25,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:25,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-04-17 23:02:25,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:25,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53577814] [2020-04-17 23:02:25,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:25,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:25,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53577814] [2020-04-17 23:02:25,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955092952] [2020-04-17 23:02:25,602 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:25,649 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 23:02:25,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:25,650 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:25,651 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:25,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:25,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 23:02:25,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923654073] [2020-04-17 23:02:25,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:25,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:25,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:25,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:25,659 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-04-17 23:02:25,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:25,840 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-04-17 23:02:25,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:02:25,847 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 23:02:25,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:25,848 INFO L225 Difference]: With dead ends: 66 [2020-04-17 23:02:25,848 INFO L226 Difference]: Without dead ends: 60 [2020-04-17 23:02:25,849 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:02:25,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-17 23:02:25,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-04-17 23:02:25,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 23:02:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-04-17 23:02:25,851 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-04-17 23:02:25,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:25,852 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-04-17 23:02:25,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:25,852 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-04-17 23:02:25,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:25,852 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:25,853 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:26,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:26,057 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:26,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:26,057 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-04-17 23:02:26,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:26,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737966061] [2020-04-17 23:02:26,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:26,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737966061] [2020-04-17 23:02:26,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241463908] [2020-04-17 23:02:26,189 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:26,263 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 23:02:26,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:26,264 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:26,266 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:26,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:26,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:26,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 23:02:26,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350839381] [2020-04-17 23:02:26,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:26,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:26,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:26,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:26,327 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-04-17 23:02:26,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:26,571 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-04-17 23:02:26,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:02:26,572 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 23:02:26,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:26,573 INFO L225 Difference]: With dead ends: 74 [2020-04-17 23:02:26,573 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 23:02:26,574 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:02:26,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 23:02:26,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-04-17 23:02:26,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-04-17 23:02:26,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-04-17 23:02:26,580 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-04-17 23:02:26,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:26,581 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-04-17 23:02:26,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:26,581 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-04-17 23:02:26,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:26,582 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:26,582 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:26,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:26,787 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:26,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:26,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-04-17 23:02:26,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:26,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351748257] [2020-04-17 23:02:26,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:26,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351748257] [2020-04-17 23:02:26,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122288117] [2020-04-17 23:02:26,888 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:26,935 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:26,936 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:26,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:26,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:26,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 23:02:26,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100109335] [2020-04-17 23:02:26,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:26,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:26,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:26,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:26,948 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-04-17 23:02:27,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:27,150 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-04-17 23:02:27,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:27,150 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 23:02:27,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:27,151 INFO L225 Difference]: With dead ends: 75 [2020-04-17 23:02:27,151 INFO L226 Difference]: Without dead ends: 69 [2020-04-17 23:02:27,151 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:02:27,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-04-17 23:02:27,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-04-17 23:02:27,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 23:02:27,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 23:02:27,155 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-04-17 23:02:27,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:27,156 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 23:02:27,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:27,157 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 23:02:27,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:27,157 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:27,157 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:27,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:27,361 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:27,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:27,361 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-04-17 23:02:27,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:27,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524901485] [2020-04-17 23:02:27,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:27,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524901485] [2020-04-17 23:02:27,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924418738] [2020-04-17 23:02:27,488 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:27,558 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:27,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:27,559 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:27,561 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:27,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:27,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:27,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 23:02:27,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327588645] [2020-04-17 23:02:27,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:27,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:27,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:27,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:27,599 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-04-17 23:02:27,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:27,888 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-04-17 23:02:27,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:02:27,889 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 23:02:27,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:27,890 INFO L225 Difference]: With dead ends: 79 [2020-04-17 23:02:27,890 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 23:02:27,890 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:02:27,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 23:02:27,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-04-17 23:02:27,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 23:02:27,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 23:02:27,893 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-04-17 23:02:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:27,893 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 23:02:27,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:27,894 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 23:02:27,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:27,894 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:27,894 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:28,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:28,098 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:28,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:28,098 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-04-17 23:02:28,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:28,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529893793] [2020-04-17 23:02:28,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:28,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529893793] [2020-04-17 23:02:28,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754204762] [2020-04-17 23:02:28,200 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:28,257 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 23:02:28,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:28,258 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:28,265 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:28,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:28,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 23:02:28,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716811407] [2020-04-17 23:02:28,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:28,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:28,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:28,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:28,280 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-04-17 23:02:28,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:28,568 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-04-17 23:02:28,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:02:28,574 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 23:02:28,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:28,575 INFO L225 Difference]: With dead ends: 79 [2020-04-17 23:02:28,575 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 23:02:28,575 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:02:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 23:02:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-04-17 23:02:28,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-04-17 23:02:28,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-04-17 23:02:28,581 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-04-17 23:02:28,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:28,581 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-04-17 23:02:28,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:28,582 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-04-17 23:02:28,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:28,582 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:28,582 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:28,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:28,786 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:28,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:28,786 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-04-17 23:02:28,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:28,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931053562] [2020-04-17 23:02:28,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:28,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931053562] [2020-04-17 23:02:28,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925846245] [2020-04-17 23:02:28,856 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:28,912 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:28,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:28,913 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:28,913 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:28,962 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:28,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:28,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 23:02:28,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216301730] [2020-04-17 23:02:28,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:28,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:28,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:28,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:28,994 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-04-17 23:02:29,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:29,634 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-04-17 23:02:29,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:02:29,634 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 23:02:29,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:29,636 INFO L225 Difference]: With dead ends: 76 [2020-04-17 23:02:29,636 INFO L226 Difference]: Without dead ends: 70 [2020-04-17 23:02:29,637 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:02:29,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-17 23:02:29,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-04-17 23:02:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 23:02:29,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-04-17 23:02:29,641 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-04-17 23:02:29,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:29,641 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-04-17 23:02:29,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:29,642 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-04-17 23:02:29,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:29,642 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:29,643 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:29,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:29,847 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:29,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:29,847 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-04-17 23:02:29,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:29,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222630535] [2020-04-17 23:02:29,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:29,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222630535] [2020-04-17 23:02:29,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631261388] [2020-04-17 23:02:29,924 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:29,974 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 23:02:29,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:29,975 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:29,976 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:29,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:29,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 23:02:29,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479041768] [2020-04-17 23:02:29,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:29,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:29,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:29,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:29,991 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-04-17 23:02:30,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:30,303 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-04-17 23:02:30,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:02:30,303 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 23:02:30,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:30,304 INFO L225 Difference]: With dead ends: 96 [2020-04-17 23:02:30,304 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 23:02:30,304 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:02:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 23:02:30,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-04-17 23:02:30,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 23:02:30,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-04-17 23:02:30,307 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-04-17 23:02:30,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:30,308 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-04-17 23:02:30,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:30,308 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-04-17 23:02:30,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:30,308 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:30,308 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:30,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:30,512 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:30,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:30,513 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-04-17 23:02:30,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:30,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264136191] [2020-04-17 23:02:30,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:30,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264136191] [2020-04-17 23:02:30,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742004669] [2020-04-17 23:02:30,600 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:30,660 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 23:02:30,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:30,661 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:30,662 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:30,686 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:30,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:30,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 23:02:30,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781822328] [2020-04-17 23:02:30,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:30,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:30,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:30,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:30,700 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-04-17 23:02:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:31,070 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-04-17 23:02:31,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:02:31,071 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 23:02:31,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:31,072 INFO L225 Difference]: With dead ends: 77 [2020-04-17 23:02:31,072 INFO L226 Difference]: Without dead ends: 69 [2020-04-17 23:02:31,073 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:02:31,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-04-17 23:02:31,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-04-17 23:02:31,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 23:02:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-04-17 23:02:31,076 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-04-17 23:02:31,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:31,076 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-04-17 23:02:31,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-04-17 23:02:31,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:31,077 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:31,077 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:31,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:31,280 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:31,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:31,281 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-04-17 23:02:31,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:31,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004931049] [2020-04-17 23:02:31,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:31,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004931049] [2020-04-17 23:02:31,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897893183] [2020-04-17 23:02:31,387 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:31,455 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:31,456 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:31,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:31,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 23:02:31,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575980143] [2020-04-17 23:02:31,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:31,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:31,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:31,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:31,468 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-04-17 23:02:31,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:31,715 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-04-17 23:02:31,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 23:02:31,715 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 23:02:31,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:31,717 INFO L225 Difference]: With dead ends: 84 [2020-04-17 23:02:31,717 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 23:02:31,717 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:02:31,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 23:02:31,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-04-17 23:02:31,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 23:02:31,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 23:02:31,720 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 23:02:31,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:31,720 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 23:02:31,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:31,721 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 23:02:31,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:31,721 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:31,721 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:31,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:31,924 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:31,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:31,925 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-04-17 23:02:31,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:31,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370054516] [2020-04-17 23:02:31,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:32,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370054516] [2020-04-17 23:02:32,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685078503] [2020-04-17 23:02:32,040 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:32,079 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:32,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:32,080 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:32,081 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:32,093 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:32,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:32,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 23:02:32,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088459865] [2020-04-17 23:02:32,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:32,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:32,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:32,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:32,105 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 23:02:32,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:32,347 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-04-17 23:02:32,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:02:32,348 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 23:02:32,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:32,349 INFO L225 Difference]: With dead ends: 81 [2020-04-17 23:02:32,349 INFO L226 Difference]: Without dead ends: 75 [2020-04-17 23:02:32,349 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:02:32,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-17 23:02:32,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-04-17 23:02:32,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 23:02:32,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 23:02:32,352 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 23:02:32,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:32,352 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 23:02:32,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:32,352 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 23:02:32,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:32,353 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:32,353 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:32,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:32,559 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:32,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:32,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-04-17 23:02:32,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:32,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942974760] [2020-04-17 23:02:32,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:32,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942974760] [2020-04-17 23:02:32,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679282602] [2020-04-17 23:02:32,651 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:32,709 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 23:02:32,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:32,710 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:32,711 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:32,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:32,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 23:02:32,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717257207] [2020-04-17 23:02:32,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:32,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:32,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:32,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:32,725 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 23:02:32,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:32,960 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-04-17 23:02:32,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:32,961 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 23:02:32,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:32,961 INFO L225 Difference]: With dead ends: 78 [2020-04-17 23:02:32,961 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 23:02:32,962 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:02:32,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 23:02:32,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-04-17 23:02:32,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 23:02:32,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 23:02:32,964 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 23:02:32,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:32,964 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 23:02:32,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:32,964 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 23:02:32,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:32,965 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:32,965 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:33,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:33,165 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:33,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:33,166 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-04-17 23:02:33,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:33,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675483729] [2020-04-17 23:02:33,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:33,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675483729] [2020-04-17 23:02:33,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173117133] [2020-04-17 23:02:33,246 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:33,295 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:33,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:33,296 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:33,297 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:33,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:33,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:33,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 23:02:33,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515795859] [2020-04-17 23:02:33,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:33,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:33,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:33,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:33,332 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 23:02:33,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:33,639 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-04-17 23:02:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:02:33,640 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 23:02:33,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:33,641 INFO L225 Difference]: With dead ends: 77 [2020-04-17 23:02:33,641 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 23:02:33,642 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:02:33,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 23:02:33,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-04-17 23:02:33,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 23:02:33,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 23:02:33,644 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 23:02:33,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:33,645 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 23:02:33,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:33,645 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 23:02:33,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:33,645 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:33,645 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:33,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:33,849 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:33,850 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-04-17 23:02:33,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:33,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767907398] [2020-04-17 23:02:33,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:33,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767907398] [2020-04-17 23:02:33,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467680487] [2020-04-17 23:02:33,935 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:33,982 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 23:02:33,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:33,983 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:33,985 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:34,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:34,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 23:02:34,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13729678] [2020-04-17 23:02:34,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:34,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:34,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:34,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:34,007 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 23:02:34,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:34,295 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-04-17 23:02:34,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:02:34,296 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 23:02:34,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:34,297 INFO L225 Difference]: With dead ends: 74 [2020-04-17 23:02:34,297 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 23:02:34,297 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:02:34,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 23:02:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-04-17 23:02:34,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 23:02:34,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 23:02:34,301 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 23:02:34,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:34,301 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 23:02:34,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:34,301 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 23:02:34,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:34,302 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:34,302 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:34,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:34,506 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:34,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:34,506 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-04-17 23:02:34,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:34,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946358329] [2020-04-17 23:02:34,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:34,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946358329] [2020-04-17 23:02:34,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443628938] [2020-04-17 23:02:34,593 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:34,641 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 23:02:34,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:34,642 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:34,643 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:34,664 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:34,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:34,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 23:02:34,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223528472] [2020-04-17 23:02:34,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:34,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:34,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:34,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:34,676 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 23:02:35,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:35,054 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-04-17 23:02:35,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:02:35,057 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 23:02:35,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:35,058 INFO L225 Difference]: With dead ends: 73 [2020-04-17 23:02:35,058 INFO L226 Difference]: Without dead ends: 67 [2020-04-17 23:02:35,059 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-04-17 23:02:35,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-04-17 23:02:35,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-04-17 23:02:35,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 23:02:35,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 23:02:35,061 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 23:02:35,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:35,062 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 23:02:35,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:35,062 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 23:02:35,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:35,062 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:35,062 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:35,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:35,263 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:35,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:35,264 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-04-17 23:02:35,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:35,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022280351] [2020-04-17 23:02:35,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:35,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022280351] [2020-04-17 23:02:35,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093832982] [2020-04-17 23:02:35,341 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:35,396 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:35,397 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:35,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:35,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:35,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 23:02:35,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882407174] [2020-04-17 23:02:35,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:35,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:35,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:35,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:35,407 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 23:02:35,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:35,708 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-04-17 23:02:35,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:02:35,709 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 23:02:35,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:35,710 INFO L225 Difference]: With dead ends: 89 [2020-04-17 23:02:35,710 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 23:02:35,711 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:02:35,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 23:02:35,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-04-17 23:02:35,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-17 23:02:35,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-04-17 23:02:35,714 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-04-17 23:02:35,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:35,714 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-04-17 23:02:35,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:35,715 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-04-17 23:02:35,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:35,715 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:35,715 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:35,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:35,918 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:35,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:35,918 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-04-17 23:02:35,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:35,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118352487] [2020-04-17 23:02:35,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:36,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118352487] [2020-04-17 23:02:36,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090931433] [2020-04-17 23:02:36,013 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:36,062 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:36,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:36,063 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:36,064 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:36,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:36,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 23:02:36,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668762477] [2020-04-17 23:02:36,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:36,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:36,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:36,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:36,093 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-04-17 23:02:36,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:36,465 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-04-17 23:02:36,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:02:36,466 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 23:02:36,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:36,466 INFO L225 Difference]: With dead ends: 68 [2020-04-17 23:02:36,467 INFO L226 Difference]: Without dead ends: 60 [2020-04-17 23:02:36,467 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-04-17 23:02:36,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-17 23:02:36,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-04-17 23:02:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-04-17 23:02:36,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-04-17 23:02:36,471 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-04-17 23:02:36,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:36,471 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-04-17 23:02:36,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:36,471 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-04-17 23:02:36,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:36,471 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:36,472 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:36,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:36,674 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:36,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:36,675 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-04-17 23:02:36,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:36,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614982686] [2020-04-17 23:02:36,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:36,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614982686] [2020-04-17 23:02:36,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650051333] [2020-04-17 23:02:36,759 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:36,805 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 23:02:36,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:36,806 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:36,807 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:36,823 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:36,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:36,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 23:02:36,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354979935] [2020-04-17 23:02:36,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:36,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:36,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:36,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:36,836 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-04-17 23:02:37,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:37,226 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-04-17 23:02:37,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:02:37,226 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 23:02:37,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:37,227 INFO L225 Difference]: With dead ends: 76 [2020-04-17 23:02:37,227 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 23:02:37,228 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-04-17 23:02:37,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 23:02:37,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-04-17 23:02:37,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 23:02:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-04-17 23:02:37,231 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-04-17 23:02:37,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:37,232 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-04-17 23:02:37,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:37,232 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-04-17 23:02:37,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:37,232 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:37,232 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:37,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:37,436 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:37,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:37,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-04-17 23:02:37,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:37,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356400125] [2020-04-17 23:02:37,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:37,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356400125] [2020-04-17 23:02:37,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381261039] [2020-04-17 23:02:37,555 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:37,610 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:37,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:37,611 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:37,612 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:37,629 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:37,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:37,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 23:02:37,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5137634] [2020-04-17 23:02:37,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:37,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:37,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:37,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:37,643 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-04-17 23:02:38,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:38,045 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-04-17 23:02:38,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:02:38,046 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 23:02:38,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:38,047 INFO L225 Difference]: With dead ends: 66 [2020-04-17 23:02:38,047 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 23:02:38,048 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-04-17 23:02:38,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 23:02:38,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-04-17 23:02:38,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 23:02:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-04-17 23:02:38,051 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-04-17 23:02:38,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:38,051 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-04-17 23:02:38,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:38,052 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-04-17 23:02:38,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:38,052 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:38,052 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:38,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:38,255 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:38,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:38,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-04-17 23:02:38,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:38,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189595532] [2020-04-17 23:02:38,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:38,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:38,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189595532] [2020-04-17 23:02:38,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132552607] [2020-04-17 23:02:38,383 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:38,431 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 23:02:38,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:38,432 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:38,433 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:38,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:38,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 23:02:38,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957223687] [2020-04-17 23:02:38,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:38,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:38,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:38,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:38,442 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-04-17 23:02:38,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:38,611 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-04-17 23:02:38,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 23:02:38,612 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 23:02:38,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:38,613 INFO L225 Difference]: With dead ends: 72 [2020-04-17 23:02:38,613 INFO L226 Difference]: Without dead ends: 66 [2020-04-17 23:02:38,613 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:02:38,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-04-17 23:02:38,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-04-17 23:02:38,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 23:02:38,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-04-17 23:02:38,616 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-04-17 23:02:38,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:38,616 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-04-17 23:02:38,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:38,616 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-04-17 23:02:38,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:38,617 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:38,617 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:38,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:38,820 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:38,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:38,821 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-04-17 23:02:38,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:38,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137116457] [2020-04-17 23:02:38,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:38,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137116457] [2020-04-17 23:02:38,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650844727] [2020-04-17 23:02:38,953 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:39,028 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 23:02:39,029 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:39,030 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:39,030 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:39,053 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:39,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:39,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 23:02:39,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562531753] [2020-04-17 23:02:39,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:39,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:39,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:39,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:39,085 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-04-17 23:02:39,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:39,418 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-04-17 23:02:39,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:02:39,418 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 23:02:39,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:39,420 INFO L225 Difference]: With dead ends: 82 [2020-04-17 23:02:39,420 INFO L226 Difference]: Without dead ends: 76 [2020-04-17 23:02:39,421 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:02:39,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-04-17 23:02:39,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-04-17 23:02:39,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 23:02:39,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-04-17 23:02:39,424 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-04-17 23:02:39,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:39,424 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-04-17 23:02:39,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:39,424 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-04-17 23:02:39,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:39,424 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:39,424 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:39,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:39,625 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:39,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:39,626 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-04-17 23:02:39,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:39,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906917687] [2020-04-17 23:02:39,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:39,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906917687] [2020-04-17 23:02:39,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351573541] [2020-04-17 23:02:39,741 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:39,795 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:39,796 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:39,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:39,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:39,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 23:02:39,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274023621] [2020-04-17 23:02:39,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:39,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:39,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:39,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:39,816 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-04-17 23:02:40,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:40,080 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-04-17 23:02:40,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:02:40,080 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 23:02:40,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:40,082 INFO L225 Difference]: With dead ends: 83 [2020-04-17 23:02:40,082 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 23:02:40,082 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:02:40,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 23:02:40,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-04-17 23:02:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 23:02:40,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-04-17 23:02:40,085 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-04-17 23:02:40,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:40,085 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-04-17 23:02:40,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:40,085 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-04-17 23:02:40,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:40,086 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:40,086 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:40,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:40,289 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:40,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:40,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-04-17 23:02:40,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:40,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141864475] [2020-04-17 23:02:40,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:40,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141864475] [2020-04-17 23:02:40,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472055512] [2020-04-17 23:02:40,407 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:40,453 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:40,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:40,454 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:40,455 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:40,473 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:40,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:40,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:40,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 23:02:40,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865458345] [2020-04-17 23:02:40,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:40,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:40,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:40,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:40,485 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-04-17 23:02:40,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:40,770 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-04-17 23:02:40,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:02:40,775 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 23:02:40,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:40,776 INFO L225 Difference]: With dead ends: 89 [2020-04-17 23:02:40,776 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 23:02:40,776 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:02:40,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 23:02:40,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-04-17 23:02:40,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 23:02:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-04-17 23:02:40,778 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-04-17 23:02:40,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:40,779 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-04-17 23:02:40,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:40,779 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-04-17 23:02:40,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:40,779 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:40,779 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:40,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:40,982 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:40,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:40,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-04-17 23:02:40,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:40,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848158955] [2020-04-17 23:02:40,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:41,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848158955] [2020-04-17 23:02:41,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907317511] [2020-04-17 23:02:41,086 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:41,134 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 23:02:41,134 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:41,135 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:41,136 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:41,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:41,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 23:02:41,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105683996] [2020-04-17 23:02:41,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:41,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:41,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:41,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:41,146 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-04-17 23:02:41,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:41,467 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-04-17 23:02:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:02:41,468 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 23:02:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:41,469 INFO L225 Difference]: With dead ends: 89 [2020-04-17 23:02:41,469 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 23:02:41,469 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-04-17 23:02:41,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 23:02:41,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-04-17 23:02:41,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 23:02:41,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 23:02:41,472 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-04-17 23:02:41,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:41,473 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 23:02:41,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:41,473 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 23:02:41,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:41,473 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:41,473 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:41,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:41,677 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:41,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:41,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-04-17 23:02:41,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:41,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320933817] [2020-04-17 23:02:41,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:41,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320933817] [2020-04-17 23:02:41,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097995202] [2020-04-17 23:02:41,776 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:41,822 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:41,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:41,823 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:41,824 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:41,839 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:41,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:41,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 23:02:41,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012857978] [2020-04-17 23:02:41,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:41,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:41,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:41,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:41,848 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-04-17 23:02:42,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:42,247 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-04-17 23:02:42,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:02:42,247 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 23:02:42,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:42,248 INFO L225 Difference]: With dead ends: 86 [2020-04-17 23:02:42,248 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 23:02:42,248 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-04-17 23:02:42,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 23:02:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-04-17 23:02:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 23:02:42,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 23:02:42,250 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-04-17 23:02:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:42,250 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 23:02:42,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:42,250 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 23:02:42,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:42,251 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:42,251 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:42,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:42,451 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:42,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:42,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-04-17 23:02:42,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:42,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088469151] [2020-04-17 23:02:42,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:42,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088469151] [2020-04-17 23:02:42,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297887620] [2020-04-17 23:02:42,532 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:42,577 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 23:02:42,577 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:42,578 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:42,579 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:42,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:42,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:42,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 23:02:42,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890899431] [2020-04-17 23:02:42,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:42,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:42,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:42,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:42,601 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-04-17 23:02:42,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:42,951 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-04-17 23:02:42,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 23:02:42,951 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 23:02:42,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:42,952 INFO L225 Difference]: With dead ends: 87 [2020-04-17 23:02:42,952 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 23:02:42,953 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-04-17 23:02:42,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 23:02:42,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-04-17 23:02:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-04-17 23:02:42,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-04-17 23:02:42,957 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-04-17 23:02:42,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:42,957 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-04-17 23:02:42,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:42,958 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-04-17 23:02:42,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:42,958 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:42,958 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:43,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:43,162 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:43,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:43,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-04-17 23:02:43,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:43,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743583936] [2020-04-17 23:02:43,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:43,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:43,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743583936] [2020-04-17 23:02:43,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316532783] [2020-04-17 23:02:43,251 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:43,296 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 23:02:43,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:43,298 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:43,299 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:43,318 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:43,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:43,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 23:02:43,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694834130] [2020-04-17 23:02:43,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:43,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:43,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:43,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:43,329 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-04-17 23:02:43,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:43,789 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-04-17 23:02:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:02:43,789 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 23:02:43,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:43,790 INFO L225 Difference]: With dead ends: 84 [2020-04-17 23:02:43,790 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 23:02:43,791 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-04-17 23:02:43,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 23:02:43,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-04-17 23:02:43,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 23:02:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-04-17 23:02:43,795 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-04-17 23:02:43,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:43,795 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-04-17 23:02:43,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-04-17 23:02:43,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:43,796 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:43,796 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:43,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:43,999 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:43,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:43,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-04-17 23:02:44,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:44,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328967486] [2020-04-17 23:02:44,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:44,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328967486] [2020-04-17 23:02:44,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789199431] [2020-04-17 23:02:44,087 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:44,135 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:44,136 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:44,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:44,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 23:02:44,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690049706] [2020-04-17 23:02:44,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:44,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:44,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:44,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:44,157 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-04-17 23:02:44,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:44,543 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-04-17 23:02:44,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:02:44,544 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 23:02:44,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:44,545 INFO L225 Difference]: With dead ends: 104 [2020-04-17 23:02:44,545 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 23:02:44,545 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-04-17 23:02:44,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 23:02:44,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-04-17 23:02:44,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 23:02:44,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-04-17 23:02:44,548 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-04-17 23:02:44,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:44,549 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-04-17 23:02:44,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:44,549 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-04-17 23:02:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:44,549 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:44,549 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:44,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:44,752 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:44,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:44,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-04-17 23:02:44,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:44,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710295463] [2020-04-17 23:02:44,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:44,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710295463] [2020-04-17 23:02:44,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356471469] [2020-04-17 23:02:44,832 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:44,874 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:44,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:44,876 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:44,877 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:44,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:44,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:44,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 23:02:44,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849722278] [2020-04-17 23:02:44,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:44,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:44,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:44,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:44,904 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-04-17 23:02:45,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:45,406 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-04-17 23:02:45,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:02:45,406 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 23:02:45,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:45,407 INFO L225 Difference]: With dead ends: 85 [2020-04-17 23:02:45,407 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 23:02:45,408 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 23:02:45,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 23:02:45,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-04-17 23:02:45,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-17 23:02:45,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-04-17 23:02:45,410 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-04-17 23:02:45,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:45,411 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-04-17 23:02:45,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:45,411 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-04-17 23:02:45,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:45,412 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:45,412 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:45,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:45,616 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:45,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:45,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-04-17 23:02:45,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:45,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359156552] [2020-04-17 23:02:45,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:45,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359156552] [2020-04-17 23:02:45,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681525436] [2020-04-17 23:02:45,786 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:45,865 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 23:02:45,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:45,866 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:45,868 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:45,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:45,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 23:02:45,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198142645] [2020-04-17 23:02:45,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:45,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:45,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:45,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:45,889 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-04-17 23:02:46,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:46,129 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-04-17 23:02:46,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:46,130 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 23:02:46,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:46,130 INFO L225 Difference]: With dead ends: 94 [2020-04-17 23:02:46,131 INFO L226 Difference]: Without dead ends: 88 [2020-04-17 23:02:46,131 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:02:46,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-04-17 23:02:46,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-04-17 23:02:46,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 23:02:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 23:02:46,133 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 23:02:46,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:46,133 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 23:02:46,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:46,134 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 23:02:46,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:46,134 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:46,134 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:46,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:46,338 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:46,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:46,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-04-17 23:02:46,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:46,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292440166] [2020-04-17 23:02:46,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:46,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292440166] [2020-04-17 23:02:46,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132762864] [2020-04-17 23:02:46,529 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:46,590 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:46,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:46,591 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:46,592 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:46,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:46,618 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:46,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:46,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 23:02:46,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928075265] [2020-04-17 23:02:46,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:46,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:46,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:46,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:46,619 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 23:02:46,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:46,922 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-04-17 23:02:46,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:02:46,922 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 23:02:46,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:46,923 INFO L225 Difference]: With dead ends: 91 [2020-04-17 23:02:46,924 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 23:02:46,924 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-04-17 23:02:46,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 23:02:46,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-04-17 23:02:46,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 23:02:46,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 23:02:46,926 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 23:02:46,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:46,927 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 23:02:46,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:46,927 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 23:02:46,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:46,927 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:46,927 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:47,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:47,128 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:47,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:47,129 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-04-17 23:02:47,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:47,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070781329] [2020-04-17 23:02:47,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:47,252 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:47,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070781329] [2020-04-17 23:02:47,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790683422] [2020-04-17 23:02:47,253 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:47,308 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 23:02:47,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:47,309 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:47,310 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:47,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:47,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 23:02:47,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669454289] [2020-04-17 23:02:47,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:47,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:47,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:47,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:47,321 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 23:02:47,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:47,593 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-04-17 23:02:47,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:02:47,594 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 23:02:47,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:47,595 INFO L225 Difference]: With dead ends: 88 [2020-04-17 23:02:47,595 INFO L226 Difference]: Without dead ends: 82 [2020-04-17 23:02:47,595 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:02:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-04-17 23:02:47,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-04-17 23:02:47,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 23:02:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 23:02:47,598 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 23:02:47,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:47,599 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 23:02:47,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 23:02:47,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:47,599 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:47,599 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:47,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:47,803 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:47,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:47,803 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-04-17 23:02:47,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:47,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394699325] [2020-04-17 23:02:47,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:47,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394699325] [2020-04-17 23:02:47,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074760915] [2020-04-17 23:02:47,916 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:47,964 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 23:02:47,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:47,965 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:47,965 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:47,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:47,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:47,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 23:02:47,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14620792] [2020-04-17 23:02:47,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:47,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:47,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:47,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:47,997 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 23:02:48,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:48,396 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-04-17 23:02:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:02:48,397 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 23:02:48,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:48,398 INFO L225 Difference]: With dead ends: 87 [2020-04-17 23:02:48,398 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 23:02:48,398 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-04-17 23:02:48,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 23:02:48,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-04-17 23:02:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 23:02:48,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 23:02:48,401 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 23:02:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:48,401 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 23:02:48,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:48,401 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 23:02:48,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:48,402 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:48,402 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:48,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:48,603 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:48,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:48,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-04-17 23:02:48,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:48,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715692701] [2020-04-17 23:02:48,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:48,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715692701] [2020-04-17 23:02:48,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733618009] [2020-04-17 23:02:48,733 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:48,786 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:48,787 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:48,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:48,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 23:02:48,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185942453] [2020-04-17 23:02:48,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:48,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:48,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:48,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:48,813 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 23:02:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:49,127 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-04-17 23:02:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:02:49,127 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 23:02:49,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:49,128 INFO L225 Difference]: With dead ends: 84 [2020-04-17 23:02:49,128 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 23:02:49,129 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-04-17 23:02:49,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 23:02:49,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-04-17 23:02:49,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 23:02:49,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 23:02:49,131 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 23:02:49,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:49,131 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 23:02:49,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:49,131 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 23:02:49,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:49,132 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:49,132 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:49,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:49,332 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:49,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:49,333 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-04-17 23:02:49,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:49,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703147224] [2020-04-17 23:02:49,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:49,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703147224] [2020-04-17 23:02:49,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585275174] [2020-04-17 23:02:49,467 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:49,511 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:49,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:49,512 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:49,513 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:49,526 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:49,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:49,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 23:02:49,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892405803] [2020-04-17 23:02:49,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:49,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:49,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:49,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:49,537 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 23:02:49,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:49,994 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-04-17 23:02:49,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:02:49,995 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 23:02:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:49,996 INFO L225 Difference]: With dead ends: 83 [2020-04-17 23:02:49,996 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 23:02:49,997 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-04-17 23:02:49,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 23:02:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-04-17 23:02:49,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 23:02:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 23:02:50,000 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 23:02:50,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:50,000 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 23:02:50,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:50,001 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 23:02:50,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:50,001 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:50,001 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:50,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:50,205 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:50,205 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-04-17 23:02:50,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:50,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480816309] [2020-04-17 23:02:50,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:50,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:50,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480816309] [2020-04-17 23:02:50,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486918918] [2020-04-17 23:02:50,317 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:50,367 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 23:02:50,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:50,368 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:50,369 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:50,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:50,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 23:02:50,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657251216] [2020-04-17 23:02:50,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:50,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:50,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:50,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:50,380 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 23:02:50,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:50,752 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-04-17 23:02:50,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 23:02:50,753 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 23:02:50,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:50,754 INFO L225 Difference]: With dead ends: 80 [2020-04-17 23:02:50,754 INFO L226 Difference]: Without dead ends: 74 [2020-04-17 23:02:50,755 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-04-17 23:02:50,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-04-17 23:02:50,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-04-17 23:02:50,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 23:02:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 23:02:50,758 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 23:02:50,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:50,758 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 23:02:50,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:50,758 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 23:02:50,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:50,759 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:50,759 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:50,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:50,962 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:50,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:50,962 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-04-17 23:02:50,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:50,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401700149] [2020-04-17 23:02:50,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:51,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401700149] [2020-04-17 23:02:51,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557413525] [2020-04-17 23:02:51,069 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:51,115 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:51,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:51,116 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:51,116 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:51,129 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:51,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:51,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 23:02:51,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108039665] [2020-04-17 23:02:51,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:51,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:51,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:51,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:51,141 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 23:02:51,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:51,638 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-04-17 23:02:51,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:02:51,639 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 23:02:51,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:51,640 INFO L225 Difference]: With dead ends: 79 [2020-04-17 23:02:51,640 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 23:02:51,641 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 23:02:51,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 23:02:51,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-04-17 23:02:51,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 23:02:51,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 23:02:51,643 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 23:02:51,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:51,644 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 23:02:51,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:51,644 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 23:02:51,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:51,644 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:51,644 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:51,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:51,845 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:51,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:51,846 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-04-17 23:02:51,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:51,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648740771] [2020-04-17 23:02:51,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:51,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648740771] [2020-04-17 23:02:51,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393634402] [2020-04-17 23:02:51,944 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:51,991 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 23:02:51,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:51,992 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:51,993 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:52,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:52,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 23:02:52,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143513352] [2020-04-17 23:02:52,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:52,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:52,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:52,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:52,005 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 23:02:52,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:52,404 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-04-17 23:02:52,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:02:52,404 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 23:02:52,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:52,405 INFO L225 Difference]: With dead ends: 95 [2020-04-17 23:02:52,406 INFO L226 Difference]: Without dead ends: 89 [2020-04-17 23:02:52,406 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 23:02:52,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-04-17 23:02:52,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-04-17 23:02:52,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 23:02:52,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-04-17 23:02:52,408 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-04-17 23:02:52,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:52,408 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-04-17 23:02:52,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:52,409 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-04-17 23:02:52,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:52,409 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:52,409 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:52,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:52,610 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:52,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:52,610 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-04-17 23:02:52,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:52,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49954663] [2020-04-17 23:02:52,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:52,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49954663] [2020-04-17 23:02:52,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118499866] [2020-04-17 23:02:52,709 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:52,753 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 23:02:52,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:52,754 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:52,754 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:52,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:52,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:52,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 23:02:52,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454019857] [2020-04-17 23:02:52,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:52,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:52,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:52,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:52,781 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-04-17 23:02:53,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:53,335 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-04-17 23:02:53,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:02:53,336 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 23:02:53,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:53,337 INFO L225 Difference]: With dead ends: 76 [2020-04-17 23:02:53,337 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 23:02:53,337 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 23:02:53,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 23:02:53,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-04-17 23:02:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-04-17 23:02:53,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-04-17 23:02:53,340 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-04-17 23:02:53,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:53,340 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-04-17 23:02:53,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:53,341 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-04-17 23:02:53,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:53,341 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:53,341 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:53,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:53,544 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:53,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:53,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-04-17 23:02:53,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:53,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382198478] [2020-04-17 23:02:53,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:53,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382198478] [2020-04-17 23:02:53,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498773177] [2020-04-17 23:02:53,647 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:53,693 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:53,694 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:53,708 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:53,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:53,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 23:02:53,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051202407] [2020-04-17 23:02:53,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:53,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:53,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:53,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:53,720 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-04-17 23:02:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:54,215 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-04-17 23:02:54,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:02:54,216 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 23:02:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:54,217 INFO L225 Difference]: With dead ends: 84 [2020-04-17 23:02:54,217 INFO L226 Difference]: Without dead ends: 79 [2020-04-17 23:02:54,217 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 23:02:54,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-04-17 23:02:54,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-04-17 23:02:54,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 23:02:54,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-04-17 23:02:54,220 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-04-17 23:02:54,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:54,220 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-04-17 23:02:54,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:54,220 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-04-17 23:02:54,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:02:54,220 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:54,221 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:54,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:54,421 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:54,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:54,422 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-04-17 23:02:54,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:54,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366418738] [2020-04-17 23:02:54,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:54,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366418738] [2020-04-17 23:02:54,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046637877] [2020-04-17 23:02:54,499 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:54,576 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:54,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:54,577 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 23:02:54,578 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:54,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 23:02:54,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-04-17 23:02:54,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510314087] [2020-04-17 23:02:54,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 23:02:54,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:54,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 23:02:54,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:54,598 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 8 states. [2020-04-17 23:02:54,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:54,632 INFO L93 Difference]: Finished difference Result 151 states and 338 transitions. [2020-04-17 23:02:54,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 23:02:54,633 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-04-17 23:02:54,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:54,633 INFO L225 Difference]: With dead ends: 151 [2020-04-17 23:02:54,633 INFO L226 Difference]: Without dead ends: 50 [2020-04-17 23:02:54,634 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:54,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-04-17 23:02:54,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-04-17 23:02:54,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 23:02:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 100 transitions. [2020-04-17 23:02:54,635 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 100 transitions. Word has length 19 [2020-04-17 23:02:54,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:54,636 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 100 transitions. [2020-04-17 23:02:54,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 23:02:54,636 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 100 transitions. [2020-04-17 23:02:54,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:02:54,636 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:54,636 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:54,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:54,841 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:54,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:54,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-04-17 23:02:54,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:54,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160368928] [2020-04-17 23:02:54,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:54,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160368928] [2020-04-17 23:02:55,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644164537] [2020-04-17 23:02:55,000 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:55,050 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 23:02:55,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:55,051 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 23:02:55,051 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:55,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 23:02:55,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 22 [2020-04-17 23:02:55,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510974180] [2020-04-17 23:02:55,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 23:02:55,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:55,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 23:02:55,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:02:55,139 INFO L87 Difference]: Start difference. First operand 50 states and 100 transitions. Second operand 8 states. [2020-04-17 23:02:55,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:55,157 INFO L93 Difference]: Finished difference Result 86 states and 150 transitions. [2020-04-17 23:02:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 23:02:55,158 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-04-17 23:02:55,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:55,158 INFO L225 Difference]: With dead ends: 86 [2020-04-17 23:02:55,158 INFO L226 Difference]: Without dead ends: 0 [2020-04-17 23:02:55,159 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:02:55,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-04-17 23:02:55,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-04-17 23:02:55,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-04-17 23:02:55,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-04-17 23:02:55,159 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-04-17 23:02:55,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:55,160 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-04-17 23:02:55,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 23:02:55,160 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-04-17 23:02:55,160 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-17 23:02:55,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:55,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 11:02:55 BasicIcfg [2020-04-17 23:02:55,364 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 23:02:55,365 INFO L168 Benchmark]: Toolchain (without parser) took 48334.59 ms. Allocated memory was 139.5 MB in the beginning and 422.6 MB in the end (delta: 283.1 MB). Free memory was 101.3 MB in the beginning and 127.1 MB in the end (delta: -25.8 MB). Peak memory consumption was 257.3 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:55,366 INFO L168 Benchmark]: CDTParser took 1.01 ms. Allocated memory is still 139.5 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-04-17 23:02:55,366 INFO L168 Benchmark]: CACSL2BoogieTranslator took 645.56 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 99.3 MB in the beginning and 163.3 MB in the end (delta: -64.1 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:55,367 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.27 ms. Allocated memory is still 203.9 MB. Free memory was 163.3 MB in the beginning and 161.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:55,367 INFO L168 Benchmark]: Boogie Preprocessor took 27.70 ms. Allocated memory is still 203.9 MB. Free memory was 161.4 MB in the beginning and 159.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:55,367 INFO L168 Benchmark]: RCFGBuilder took 396.13 ms. Allocated memory is still 203.9 MB. Free memory was 159.4 MB in the beginning and 139.4 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:55,368 INFO L168 Benchmark]: TraceAbstraction took 47198.33 ms. Allocated memory was 203.9 MB in the beginning and 422.6 MB in the end (delta: 218.6 MB). Free memory was 139.4 MB in the beginning and 127.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 230.9 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:55,370 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.01 ms. Allocated memory is still 139.5 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 645.56 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 99.3 MB in the beginning and 163.3 MB in the end (delta: -64.1 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.27 ms. Allocated memory is still 203.9 MB. Free memory was 163.3 MB in the beginning and 161.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.70 ms. Allocated memory is still 203.9 MB. Free memory was 161.4 MB in the beginning and 159.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 396.13 ms. Allocated memory is still 203.9 MB. Free memory was 159.4 MB in the beginning and 139.4 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 47198.33 ms. Allocated memory was 203.9 MB in the beginning and 422.6 MB in the end (delta: 218.6 MB). Free memory was 139.4 MB in the beginning and 127.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 230.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 47.0s, OverallIterations: 71, TraceHistogramMax: 6, AutomataDifference: 19.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 1140 SDtfs, 3043 SDslu, 4491 SDs, 0 SdLazy, 4783 SolverSat, 2190 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2336 GetRequests, 835 SyntacticMatches, 64 SemanticMatches, 1437 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6979 ImplicationChecksByTransitivity, 18.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 71 MinimizatonAttempts, 1147 StatesRemovedByMinimization, 68 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 2056 NumberOfCodeBlocks, 2056 NumberOfCodeBlocksAsserted, 254 NumberOfCheckSat, 1919 ConstructedInterpolants, 0 QuantifiedInterpolants, 119241 SizeOfPredicates, 456 NumberOfNonLiveVariables, 6614 ConjunctsInSsa, 728 ConjunctsInUnsatCore, 137 InterpolantComputations, 7 PerfectInterpolantSequences, 70/1440 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...